FULLTEXT DEL 2 AV 6

10-Q – 2026-07-29 – pfg-20260630x10q.htm

Föregående del · Dokumentindex · Nästa del

http://fasb.org/us-gaap/2026#DebtSecuritiesAvailableForSaleExcludingAccruedInterest http://fasb.org/us-gaap/2026#MortgageLoansOnRealEstateCommercialAndConsumerNet http://principal.com/20260630#ContractholderFunds 0001126328 --12-31 2026 Q2 false http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://principal.com/20260630#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20260630#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#DebtSecuritiesAvailableForSaleExcludingAccruedInterest http://fasb.org/us-gaap/2026#MortgageLoansOnRealEstateCommercialAndConsumerNet http://principal.com/20260630#ContractholderFunds http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#GainLossOnInvestments http://principal.com/20260630#ChangeInFairValueOfFundsWithheldEmbeddedDerivative http://fasb.org/us-gaap/2026#ValuationTechniqueDiscountedCashFlowMember http://fasb.org/us-gaap/2026#ValuationTechniqueDiscountedCashFlowMember http://fasb.org/us-gaap/2026#ValuationTechniqueDiscountedCashFlowMember http://fasb.org/us-gaap/2026#ValuationTechniqueDiscountedCashFlowMember http://fasb.org/us-gaap/2026#ValuationTechniqueDiscountedCashFlowMember http://fasb.org/us-gaap/2026#ValuationTechniqueDiscountedCashFlowMember http://fasb.org/us-gaap/2026#ValuationTechniqueDiscountedCashFlowMember http://fasb.org/us-gaap/2026#ValuationTechniqueDiscountedCashFlowMember 0001126328 us-gaap:TreasuryStockCommonMember 2026-04-01 2026-06-30 0001126328 us-gaap:TreasuryStockCommonMember 2026-01-01 2026-06-30 0001126328 us-gaap:TreasuryStockCommonMember 2025-04-01 2025-06-30 0001126328 us-gaap:TreasuryStockCommonMember 2025-01-01 2025-06-30 0001126328 us-gaap:CommonStockMember 2026-04-01 2026-06-30 0001126328 us-gaap:CommonStockMember 2026-01-01 2026-06-30 0001126328 us-gaap:CommonStockMember 2025-04-01 2025-06-30 0001126328 us-gaap:CommonStockMember 2025-01-01 2025-06-30 0001126328 us-gaap:TreasuryStockCommonMember 2026-06-30 0001126328 us-gaap:RetainedEarningsMember 2026-06-30 0001126328 us-gaap:NoncontrollingInterestMember 2026-06-30 0001126328 us-gaap:AdditionalPaidInCapitalMember 2026-06-30 0001126328 us-gaap:TreasuryStockCommonMember 2026-03-31 0001126328 us-gaap:RetainedEarningsMember 2026-03-31 0001126328 us-gaap:NoncontrollingInterestMember 2026-03-31 0001126328 us-gaap:AdditionalPaidInCapitalMember 2026-03-31 0001126328 us-gaap:TreasuryStockCommonMember 2025-12-31 0001126328 us-gaap:RetainedEarningsMember 2025-12-31 0001126328 us-gaap:NoncontrollingInterestMember 2025-12-31 0001126328 us-gaap:AdditionalPaidInCapitalMember 2025-12-31 0001126328 us-gaap:TreasuryStockCommonMember 2025-06-30 0001126328 us-gaap:RetainedEarningsMember 2025-06-30 0001126328 us-gaap:NoncontrollingInterestMember 2025-06-30 0001126328 us-gaap:AdditionalPaidInCapitalMember 2025-06-30 0001126328 us-gaap:TreasuryStockCommonMember 2025-03-31 0001126328 us-gaap:RetainedEarningsMember 2025-03-31 0001126328 us-gaap:NoncontrollingInterestMember 2025-03-31 0001126328 us-gaap:AdditionalPaidInCapitalMember 2025-03-31 0001126328 us-gaap:TreasuryStockCommonMember 2024-12-31 0001126328 us-gaap:RetainedEarningsMember 2024-12-31 0001126328 us-gaap:NoncontrollingInterestMember 2024-12-31 0001126328 us-gaap:AdditionalPaidInCapitalMember 2024-12-31 0001126328 us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskParentMember 2026-06-30 0001126328 us-gaap:AociLiabilityForFuturePolicyBenefitParentMember 2026-06-30 0001126328 us-gaap:AccumulatedTranslationAdjustmentMember 2026-06-30 0001126328 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2026-06-30 0001126328 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2026-06-30 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2026-06-30 0001126328 us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskParentMember 2026-03-31 0001126328 us-gaap:AociLiabilityForFuturePolicyBenefitParentMember 2026-03-31 0001126328 us-gaap:AccumulatedTranslationAdjustmentMember 2026-03-31 0001126328 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2026-03-31 0001126328 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2026-03-31 0001126328 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2026-03-31 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2026-03-31 0001126328 us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskParentMember 2025-12-31 0001126328 us-gaap:AociLiabilityForFuturePolicyBenefitParentMember 2025-12-31 0001126328 us-gaap:AccumulatedTranslationAdjustmentMember 2025-12-31 0001126328 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-12-31 0001126328 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2025-12-31 0001126328 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2025-12-31 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-12-31 0001126328 us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskParentMember 2025-06-30 0001126328 us-gaap:AociLiabilityForFuturePolicyBenefitParentMember 2025-06-30 0001126328 us-gaap:AccumulatedTranslationAdjustmentMember 2025-06-30 0001126328 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-06-30 0001126328 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2025-06-30 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-06-30 0001126328 us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskParentMember 2025-03-31 0001126328 us-gaap:AociLiabilityForFuturePolicyBenefitParentMember 2025-03-31 0001126328 us-gaap:AccumulatedTranslationAdjustmentMember 2025-03-31 0001126328 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-03-31 0001126328 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2025-03-31 0001126328 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2025-03-31 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-03-31 0001126328 us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskParentMember 2024-12-31 0001126328 us-gaap:AociLiabilityForFuturePolicyBenefitParentMember 2024-12-31 0001126328 us-gaap:AccumulatedTranslationAdjustmentMember 2024-12-31 0001126328 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-12-31 0001126328 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2024-12-31 0001126328 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2024-12-31 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2024-12-31 0001126328 us-gaap:CommonStockMember 2026-06-30 0001126328 us-gaap:CommonStockMember 2026-03-31 0001126328 us-gaap:CommonStockMember 2025-12-31 0001126328 us-gaap:CommonStockMember 2025-06-30 0001126328 us-gaap:CommonStockMember 2025-03-31 0001126328 us-gaap:CommonStockMember 2024-12-31 0001126328 pfg:StockBasedCompensationPlans2026StockIncentivePlanMember 2026-06-30 0001126328 pfg:PensionMember srt:LatinAmericaMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2024-12-31 0001126328 pfg:GroupRetirementContractsProductMember pfg:SegmentRetirementAndIncomeSolutionsMember 2024-12-31 0001126328 pfg:PensionMember srt:LatinAmericaMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2026-06-30 0001126328 pfg:GroupRetirementContractsProductMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:PensionMember srt:LatinAmericaMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2025-12-31 0001126328 pfg:GroupRetirementContractsProductMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:USTreasuryAndGovernmentMember us-gaap:SeparateAccountDebtSecurityMember 2026-06-30 0001126328 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:SeparateAccountDebtSecurityMember 2026-06-30 0001126328 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:SeparateAccountDebtSecurityMember 2026-06-30 0001126328 us-gaap:OtherDebtSecuritiesMember us-gaap:SeparateAccountDebtSecurityMember 2026-06-30 0001126328 us-gaap:ForeignGovernmentDebtSecuritiesMember us-gaap:SeparateAccountDebtSecurityMember 2026-06-30 0001126328 us-gaap:CorporateDebtSecuritiesMember us-gaap:SeparateAccountDebtSecurityMember 2026-06-30 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:SeparateAccountDebtSecurityMember 2026-06-30 0001126328 us-gaap:SeparateAccountRealEstateMember 2026-06-30 0001126328 us-gaap:SeparateAccountEquitySecurityMember 2026-06-30 0001126328 us-gaap:SeparateAccountDebtSecurityMember 2026-06-30 0001126328 us-gaap:SeparateAccountCashAndCashEquivalentsMember 2026-06-30 0001126328 pfg:SeparateAccountOtherInvestmentsMember 2026-06-30 0001126328 pfg:SeparateAccountOtherAssetsMember 2026-06-30 0001126328 us-gaap:USTreasuryAndGovernmentMember us-gaap:SeparateAccountDebtSecurityMember 2025-12-31 0001126328 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:SeparateAccountDebtSecurityMember 2025-12-31 0001126328 us-gaap:ResidentialMortgageBackedSecuritiesMember us-gaap:SeparateAccountDebtSecurityMember 2025-12-31 0001126328 us-gaap:OtherDebtSecuritiesMember us-gaap:SeparateAccountDebtSecurityMember 2025-12-31 0001126328 us-gaap:ForeignGovernmentDebtSecuritiesMember us-gaap:SeparateAccountDebtSecurityMember 2025-12-31 0001126328 us-gaap:CorporateDebtSecuritiesMember us-gaap:SeparateAccountDebtSecurityMember 2025-12-31 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:SeparateAccountDebtSecurityMember 2025-12-31 0001126328 us-gaap:SeparateAccountRealEstateMember 2025-12-31 0001126328 us-gaap:SeparateAccountEquitySecurityMember 2025-12-31 0001126328 us-gaap:SeparateAccountDebtSecurityMember 2025-12-31 0001126328 us-gaap:SeparateAccountCashAndCashEquivalentsMember 2025-12-31 0001126328 pfg:SeparateAccountOtherInvestmentsMember 2025-12-31 0001126328 pfg:SeparateAccountOtherAssetsMember 2025-12-31 0001126328 us-gaap:OperatingSegmentsMember us-gaap:ManagementServiceMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInvestmentManagementMember 2026-04-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:ManagementServiceMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2026-04-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:FinancialServiceOtherMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInvestmentManagementMember 2026-04-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:FinancialServiceOtherMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2026-04-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:AdministrativeServiceMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentSpecialtyBenefitsMember 2026-04-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:AdministrativeServiceMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-04-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:FinancialServiceOtherMember pfg:SegmentCorporateMember 2026-04-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:DepositAccountMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-04-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:AdministrativeServiceMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-04-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentPrincipalAssetManagementEliminationsMember 2026-04-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:ProductsAndServicesEliminationsMember pfg:SegmentCorporateMember 2026-04-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:CommissionIncomeMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-04-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:CommissionIncomeMember pfg:SegmentCorporateMember 2026-04-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:ManagementServiceMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInvestmentManagementMember 2026-01-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:ManagementServiceMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2026-01-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:FinancialServiceOtherMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInvestmentManagementMember 2026-01-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:FinancialServiceOtherMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2026-01-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:AdministrativeServiceMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentSpecialtyBenefitsMember 2026-01-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:AdministrativeServiceMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-01-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:FinancialServiceOtherMember pfg:SegmentCorporateMember 2026-01-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:DepositAccountMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-01-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:AdministrativeServiceMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-01-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentPrincipalAssetManagementEliminationsMember 2026-01-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:ProductsAndServicesEliminationsMember pfg:SegmentCorporateMember 2026-01-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:CommissionIncomeMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-01-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:CommissionIncomeMember pfg:SegmentCorporateMember 2026-01-01 2026-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:ManagementServiceMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInvestmentManagementMember 2025-04-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:ManagementServiceMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2025-04-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:FinancialServiceOtherMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInvestmentManagementMember 2025-04-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:FinancialServiceOtherMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2025-04-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:AdministrativeServiceMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentSpecialtyBenefitsMember 2025-04-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:AdministrativeServiceMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-04-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:CommissionIncomeMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-04-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:FinancialServiceOtherMember pfg:SegmentCorporateMember 2025-04-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:DepositAccountMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-04-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:AdministrativeServiceMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-04-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentPrincipalAssetManagementEliminationsMember 2025-04-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:ProductsAndServicesEliminationsMember pfg:SegmentCorporateMember 2025-04-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:CommissionIncomeMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-04-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:CommissionIncomeMember pfg:SegmentCorporateMember 2025-04-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:ManagementServiceMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInvestmentManagementMember 2025-01-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:ManagementServiceMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2025-01-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:FinancialServiceOtherMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInvestmentManagementMember 2025-01-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:FinancialServiceOtherMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2025-01-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:AdministrativeServiceMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentSpecialtyBenefitsMember 2025-01-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:AdministrativeServiceMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-01-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:CommissionIncomeMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-01-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:FinancialServiceOtherMember pfg:SegmentCorporateMember 2025-01-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:DepositAccountMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-01-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember us-gaap:AdministrativeServiceMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-01-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentPrincipalAssetManagementEliminationsMember 2025-01-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:ProductsAndServicesEliminationsMember pfg:SegmentCorporateMember 2025-01-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:CommissionIncomeMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-01-01 2025-06-30 0001126328 us-gaap:OperatingSegmentsMember pfg:CommissionIncomeMember pfg:SegmentCorporateMember 2025-01-01 2025-06-30 0001126328 us-gaap:InterestRateContractMember us-gaap:CashFlowHedgingMember pfg:BenefitsClaimsAndSettlementExpenses 2026-04-01 2026-06-30 0001126328 us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember pfg:NetRealizedCapitalGainsLosses 2026-04-01 2026-06-30 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember pfg:OperatingExpenses 2026-04-01 2026-06-30 0001126328 us-gaap:InterestRateContractMember us-gaap:CashFlowHedgingMember pfg:BenefitsClaimsAndSettlementExpenses 2026-01-01 2026-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:CashFlowHedgingMember pfg:NetRealizedCapitalGainsLosses 2026-01-01 2026-06-30 0001126328 us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember pfg:NetRealizedCapitalGainsLosses 2026-01-01 2026-06-30 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember pfg:OperatingExpenses 2026-01-01 2026-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:CashFlowHedgingMember pfg:NetRealizedCapitalGainsLosses 2025-04-01 2025-06-30 0001126328 us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember pfg:NetRealizedCapitalGainsLosses 2025-04-01 2025-06-30 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember pfg:OperatingExpenses 2025-04-01 2025-06-30 0001126328 us-gaap:InterestRateContractMember us-gaap:CashFlowHedgingMember pfg:BenefitsClaimsAndSettlementExpenses 2025-01-01 2025-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:CashFlowHedgingMember pfg:NetRealizedCapitalGainsLosses 2025-01-01 2025-06-30 0001126328 us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember pfg:NetRealizedCapitalGainsLosses 2025-01-01 2025-06-30 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember pfg:OperatingExpenses 2025-01-01 2025-06-30 0001126328 us-gaap:IntersegmentEliminationMember pfg:SegmentCorporateMember 2026-06-30 0001126328 us-gaap:IntersegmentEliminationMember pfg:SegmentCorporateMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MinimumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember srt:MaximumMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:NetInvestmentHedgingMember 2026-04-01 2026-06-30 0001126328 us-gaap:NetInvestmentHedgingMember 2026-04-01 2026-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:NetInvestmentHedgingMember 2026-01-01 2026-06-30 0001126328 us-gaap:NetInvestmentHedgingMember 2026-01-01 2026-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:NetInvestmentHedgingMember 2025-04-01 2025-06-30 0001126328 us-gaap:NetInvestmentHedgingMember 2025-04-01 2025-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:NetInvestmentHedgingMember 2025-01-01 2025-06-30 0001126328 us-gaap:NetInvestmentHedgingMember 2025-01-01 2025-06-30 0001126328 pfg:InterestRateContractsFixedMaturitiesAvailableForSaleHedgedMember 2026-04-01 2026-06-30 0001126328 pfg:ForeignExchangeContractsFixedMaturitiesAvailableForSaleHedgedMember 2026-04-01 2026-06-30 0001126328 pfg:InterestRateContractsFixedMaturitiesAvailableForSaleHedgedMember 2026-01-01 2026-06-30 0001126328 pfg:ForeignExchangeContractsFixedMaturitiesAvailableForSaleHedgedMember 2026-01-01 2026-06-30 0001126328 pfg:InterestRateContractsFixedMaturitiesAvailableForSaleHedgedMember 2025-04-01 2025-06-30 0001126328 pfg:ForeignExchangeContractsFixedMaturitiesAvailableForSaleHedgedMember 2025-04-01 2025-06-30 0001126328 pfg:InterestRateContractsFixedMaturitiesAvailableForSaleHedgedMember 2025-01-01 2025-06-30 0001126328 pfg:ForeignExchangeContractsFixedMaturitiesAvailableForSaleHedgedMember 2025-01-01 2025-06-30 0001126328 us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskIncludingNoncontrollingInterestMember 2026-04-01 2026-06-30 0001126328 us-gaap:AociLiabilityForFuturePolicyBenefitIncludingNoncontrollingInterestMember 2026-04-01 2026-06-30 0001126328 us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskIncludingNoncontrollingInterestMember 2026-01-01 2026-06-30 0001126328 us-gaap:AociLiabilityForFuturePolicyBenefitIncludingNoncontrollingInterestMember 2026-01-01 2026-06-30 0001126328 us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskIncludingNoncontrollingInterestMember 2025-04-01 2025-06-30 0001126328 us-gaap:AociLiabilityForFuturePolicyBenefitIncludingNoncontrollingInterestMember 2025-04-01 2025-06-30 0001126328 us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember 2025-04-01 2025-06-30 0001126328 us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskIncludingNoncontrollingInterestMember 2025-01-01 2025-06-30 0001126328 us-gaap:AociLiabilityForFuturePolicyBenefitIncludingNoncontrollingInterestMember 2025-01-01 2025-06-30 0001126328 us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember 2025-01-01 2025-06-30 0001126328 us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember 2026-04-01 2026-06-30 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember 2026-04-01 2026-06-30 0001126328 us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember 2026-01-01 2026-06-30 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember 2026-01-01 2026-06-30 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember 2025-04-01 2025-06-30 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember 2025-01-01 2025-06-30 0001126328 us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskParentMember 2026-04-01 2026-06-30 0001126328 us-gaap:AociLiabilityForFuturePolicyBenefitParentMember 2026-04-01 2026-06-30 0001126328 us-gaap:AccumulatedTranslationAdjustmentMember 2026-04-01 2026-06-30 0001126328 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2026-04-01 2026-06-30 0001126328 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2026-04-01 2026-06-30 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2026-04-01 2026-06-30 0001126328 us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskParentMember 2026-01-01 2026-06-30 0001126328 us-gaap:AociLiabilityForFuturePolicyBenefitParentMember 2026-01-01 2026-06-30 0001126328 us-gaap:AccumulatedTranslationAdjustmentMember 2026-01-01 2026-06-30 0001126328 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2026-01-01 2026-06-30 0001126328 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2026-01-01 2026-06-30 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2026-01-01 2026-06-30 0001126328 us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskParentMember 2025-04-01 2025-06-30 0001126328 us-gaap:AociLiabilityForFuturePolicyBenefitParentMember 2025-04-01 2025-06-30 0001126328 us-gaap:AccumulatedTranslationAdjustmentMember 2025-04-01 2025-06-30 0001126328 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2025-04-01 2025-06-30 0001126328 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2025-04-01 2025-06-30 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-04-01 2025-06-30 0001126328 us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskParentMember 2025-01-01 2025-06-30 0001126328 us-gaap:AociLiabilityForFuturePolicyBenefitParentMember 2025-01-01 2025-06-30 0001126328 us-gaap:AccumulatedTranslationAdjustmentMember 2025-01-01 2025-06-30 0001126328 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2025-01-01 2025-06-30 0001126328 us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember 2025-01-01 2025-06-30 0001126328 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-01-01 2025-06-30 0001126328 us-gaap:AssetPledgedAsCollateralMember us-gaap:FederalHomeLoanBankAdvancesMember 2026-06-30 0001126328 us-gaap:AssetPledgedAsCollateralMember us-gaap:FederalHomeLoanBankAdvancesMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:WeightedAverageMember us-gaap:MeasurementInputPriceVolatilityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:WeightedAverageMember us-gaap:MeasurementInputLapseRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:WeightedAverageMember pfg:MeasurementInputNonPerformanceRiskMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:WeightedAverageMember pfg:MeasurementInputLongDurationInterestRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember us-gaap:MeasurementInputPriceVolatilityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember us-gaap:MeasurementInputLapseRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember pfg:MeasurementInputNonPerformanceRiskMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember pfg:MeasurementInputLongDurationInterestRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember us-gaap:MeasurementInputPriceVolatilityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember us-gaap:MeasurementInputLapseRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember pfg:MeasurementInputNonPerformanceRiskMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember pfg:MeasurementInputLongDurationInterestRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember srt:WeightedAverageMember us-gaap:MeasurementInputPriceVolatilityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:WeightedAverageMember us-gaap:MeasurementInputLapseRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:WeightedAverageMember pfg:MeasurementInputNonPerformanceRiskMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:WeightedAverageMember pfg:MeasurementInputLongDurationInterestRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember us-gaap:MeasurementInputPriceVolatilityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember us-gaap:MeasurementInputLapseRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember pfg:MeasurementInputNonPerformanceRiskMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MinimumMember pfg:MeasurementInputLongDurationInterestRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember us-gaap:MeasurementInputPriceVolatilityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember us-gaap:MeasurementInputLapseRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember pfg:MeasurementInputNonPerformanceRiskMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember srt:MaximumMember pfg:MeasurementInputLongDurationInterestRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:FixedAnnuityMember srt:LatinAmericaMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2026-04-01 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-04-01 2026-06-30 0001126328 us-gaap:TermLifeInsuranceMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-04-01 2026-06-30 0001126328 pfg:IndividualDisabilityMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentSpecialtyBenefitsMember 2026-04-01 2026-06-30 0001126328 us-gaap:FixedAnnuityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-04-01 2026-06-30 0001126328 pfg:PensionRiskTransferMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-04-01 2026-06-30 0001126328 pfg:LongTermCareInsuranceMember pfg:SegmentCorporateMember 2026-04-01 2026-06-30 0001126328 pfg:SegmentRetirementAndIncomeSolutionsMember 2026-04-01 2026-06-30 0001126328 pfg:SegmentBenefitsAndProtectionMember 2026-04-01 2026-06-30 0001126328 us-gaap:FixedAnnuityMember srt:LatinAmericaMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2025-04-01 2025-06-30 0001126328 us-gaap:UniversalLifeMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-04-01 2025-06-30 0001126328 us-gaap:TermLifeInsuranceMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-04-01 2025-06-30 0001126328 pfg:IndividualDisabilityMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentSpecialtyBenefitsMember 2025-04-01 2025-06-30 0001126328 us-gaap:FixedAnnuityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-04-01 2025-06-30 0001126328 pfg:PensionRiskTransferMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-04-01 2025-06-30 0001126328 pfg:LongTermCareInsuranceMember pfg:SegmentCorporateMember 2025-04-01 2025-06-30 0001126328 pfg:SegmentRetirementAndIncomeSolutionsMember 2025-04-01 2025-06-30 0001126328 pfg:SegmentBenefitsAndProtectionMember 2025-04-01 2025-06-30 0001126328 us-gaap:FixedAnnuityMember srt:LatinAmericaMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2025-01-01 2025-06-30 0001126328 us-gaap:UniversalLifeMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-01-01 2025-06-30 0001126328 us-gaap:TermLifeInsuranceMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-01-01 2025-06-30 0001126328 pfg:IndividualDisabilityMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentSpecialtyBenefitsMember 2025-01-01 2025-06-30 0001126328 us-gaap:FixedAnnuityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-01-01 2025-06-30 0001126328 pfg:PensionRiskTransferMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-01-01 2025-06-30 0001126328 pfg:LongTermCareInsuranceMember pfg:SegmentCorporateMember 2025-01-01 2025-06-30 0001126328 pfg:SegmentRetirementAndIncomeSolutionsMember 2025-01-01 2025-06-30 0001126328 pfg:SegmentBenefitsAndProtectionMember 2025-01-01 2025-06-30 0001126328 us-gaap:FixedAnnuityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-01-01 2026-06-30 0001126328 pfg:LongTermCareInsuranceMember pfg:SegmentCorporateMember 2026-01-01 2026-06-30 0001126328 us-gaap:FixedAnnuityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-01-01 2025-12-31 0001126328 pfg:LongTermCareInsuranceMember pfg:SegmentCorporateMember 2025-01-01 2025-12-31 0001126328 us-gaap:DebtSecuritiesMember 2026-06-30 0001126328 us-gaap:DebtSecuritiesMember 2025-12-31 0001126328 us-gaap:RestrictedStockUnitsRSUMember 2026-04-01 2026-06-30 0001126328 us-gaap:PerformanceSharesMember 2026-04-01 2026-06-30 0001126328 us-gaap:EmployeeStockOptionMember 2026-04-01 2026-06-30 0001126328 us-gaap:EmployeeStockOptionMember 2026-01-01 2026-06-30 0001126328 us-gaap:RestrictedStockUnitsRSUMember 2025-04-01 2025-06-30 0001126328 us-gaap:PerformanceSharesMember 2025-04-01 2025-06-30 0001126328 us-gaap:EmployeeStockOptionMember 2025-04-01 2025-06-30 0001126328 us-gaap:RestrictedStockUnitsRSUMember 2025-01-01 2025-06-30 0001126328 us-gaap:PerformanceSharesMember 2025-01-01 2025-06-30 0001126328 us-gaap:EmployeeStockOptionMember 2025-01-01 2025-06-30 0001126328 pfg:GuaranteesToUnconsolidatedTrustsUnderContingentFundingAgreementsMember 2026-06-30 0001126328 pfg:GuaranteesToThirdPartiesPrimarilyRelatedToFormerSubsidiariesAndJointVenturesMember 2026-06-30 0001126328 us-gaap:FairValueHedgingMember pfg:NetInvestmentIncomeLoss 2026-04-01 2026-06-30 0001126328 us-gaap:FairValueHedgingMember pfg:BenefitsClaimsAndSettlementExpenses 2026-04-01 2026-06-30 0001126328 us-gaap:CashFlowHedgingMember pfg:NetInvestmentIncomeLoss 2026-04-01 2026-06-30 0001126328 us-gaap:FairValueHedgingMember pfg:NetInvestmentIncomeLoss 2026-01-01 2026-06-30 0001126328 us-gaap:FairValueHedgingMember pfg:BenefitsClaimsAndSettlementExpenses 2026-01-01 2026-06-30 0001126328 us-gaap:CashFlowHedgingMember pfg:NetRealizedCapitalGainsLosses 2026-01-01 2026-06-30 0001126328 us-gaap:CashFlowHedgingMember pfg:NetInvestmentIncomeLoss 2026-01-01 2026-06-30 0001126328 us-gaap:CashFlowHedgingMember pfg:BenefitsClaimsAndSettlementExpenses 2026-01-01 2026-06-30 0001126328 us-gaap:FairValueHedgingMember pfg:NetInvestmentIncomeLoss 2025-04-01 2025-06-30 0001126328 us-gaap:FairValueHedgingMember pfg:BenefitsClaimsAndSettlementExpenses 2025-04-01 2025-06-30 0001126328 us-gaap:CashFlowHedgingMember pfg:NetRealizedCapitalGainsLosses 2025-04-01 2025-06-30 0001126328 us-gaap:CashFlowHedgingMember pfg:NetInvestmentIncomeLoss 2025-04-01 2025-06-30 0001126328 us-gaap:FairValueHedgingMember pfg:NetInvestmentIncomeLoss 2025-01-01 2025-06-30 0001126328 us-gaap:FairValueHedgingMember pfg:BenefitsClaimsAndSettlementExpenses 2025-01-01 2025-06-30 0001126328 us-gaap:CashFlowHedgingMember pfg:NetRealizedCapitalGainsLosses 2025-01-01 2025-06-30 0001126328 us-gaap:CashFlowHedgingMember pfg:NetInvestmentIncomeLoss 2025-01-01 2025-06-30 0001126328 us-gaap:CashFlowHedgingMember pfg:BenefitsClaimsAndSettlementExpenses 2025-01-01 2025-06-30 0001126328 us-gaap:EquitySecuritiesMember 2026-06-30 0001126328 pfg:OtherInvestments1Member 2026-06-30 0001126328 pfg:MortgageLoansMember 2026-06-30 0001126328 pfg:FixedMaturitiesTradingMember 2026-06-30 0001126328 pfg:FixedMaturitiesSecuritiesAvailableForSaleMember 2026-06-30 0001126328 pfg:AssetsCashAndCashEquivalentsMember 2026-06-30 0001126328 pfg:AccruedInterestIncomeReceivableMember 2026-06-30 0001126328 us-gaap:EquitySecuritiesMember 2025-12-31 0001126328 pfg:OtherInvestments1Member 2025-12-31 0001126328 pfg:MortgageLoansMember 2025-12-31 0001126328 pfg:FixedMaturitiesTradingMember 2025-12-31 0001126328 pfg:FixedMaturitiesSecuritiesAvailableForSaleMember 2025-12-31 0001126328 pfg:AssetsCashAndCashEquivalentsMember 2025-12-31 0001126328 pfg:AccruedInterestIncomeReceivableMember 2025-12-31 0001126328 us-gaap:ResidentialPortfolioSegmentMember 2026-04-01 2026-06-30 0001126328 pfg:ReinsuranceRecoverablesMember 2026-04-01 2026-06-30 0001126328 pfg:ReinsuranceRecoverablesMember 2026-01-01 2026-06-30 0001126328 pfg:ReinsuranceRecoverablesMember 2025-01-01 2025-06-30 0001126328 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2026-06-30 0001126328 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2026-06-30 0001126328 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2026-06-30 0001126328 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancialAssetPastDueMember 2026-06-30 0001126328 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancialAssetNotPastDueMember 2026-06-30 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2026-06-30 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2026-06-30 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2026-06-30 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancialAssetPastDueMember 2026-06-30 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancialAssetNotPastDueMember 2026-06-30 0001126328 pfg:StandardPoorsBPlusAndBelowRatingMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 pfg:StandardPoorsBBPlusThruBBMinusRatingMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 pfg:StandardPoorsBBBPlusThruBBBMinusRatingMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 pfg:StandardPoorsAMinusAndAboveRatingMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 pfg:PerformingMember us-gaap:ResidentialPortfolioSegmentMember 2026-06-30 0001126328 pfg:PerformingMember us-gaap:ConsumerPortfolioSegmentMember 2026-06-30 0001126328 pfg:NonperformingMember us-gaap:ConsumerPortfolioSegmentMember 2026-06-30 0001126328 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2025-12-31 0001126328 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-12-31 0001126328 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-12-31 0001126328 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancialAssetPastDueMember 2025-12-31 0001126328 us-gaap:ConsumerPortfolioSegmentMember us-gaap:FinancialAssetNotPastDueMember 2025-12-31 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2025-12-31 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-12-31 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-12-31 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancialAssetPastDueMember 2025-12-31 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember us-gaap:FinancialAssetNotPastDueMember 2025-12-31 0001126328 pfg:PerformingMember us-gaap:ConsumerPortfolioSegmentMember 2025-12-31 0001126328 pfg:NonperformingMember us-gaap:ConsumerPortfolioSegmentMember 2025-12-31 0001126328 us-gaap:ResidentialPortfolioSegmentMember 2025-04-01 2025-06-30 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-04-01 2025-06-30 0001126328 us-gaap:ResidentialPortfolioSegmentMember 2025-01-01 2025-06-30 0001126328 pfg:ReinsuranceRecoverablesMember 2026-06-30 0001126328 us-gaap:ResidentialPortfolioSegmentMember 2026-03-31 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-03-31 0001126328 pfg:ReinsuranceRecoverablesMember 2026-03-31 0001126328 pfg:ReinsuranceRecoverablesMember 2025-12-31 0001126328 us-gaap:ResidentialPortfolioSegmentMember 2025-06-30 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-06-30 0001126328 pfg:ReinsuranceRecoverablesMember 2025-06-30 0001126328 us-gaap:ResidentialPortfolioSegmentMember 2025-03-31 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-03-31 0001126328 pfg:ReinsuranceRecoverablesMember 2025-03-31 0001126328 pfg:ReinsuranceRecoverablesMember 2024-12-31 0001126328 us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-01-01 2025-06-30 0001126328 us-gaap:AssetPledgedAsCollateralWithRightMember 2026-06-30 0001126328 us-gaap:AssetPledgedAsCollateralWithRightMember 2025-12-31 0001126328 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember pfg:CertainOtherLoansMember 2026-04-01 2026-06-30 0001126328 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember pfg:CertainOtherLoansMember 2026-01-01 2026-06-30 0001126328 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember pfg:CertainOtherLoansMember 2025-04-01 2025-06-30 0001126328 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember pfg:CertainOtherLoansMember 2025-01-01 2025-06-30 0001126328 us-gaap:FairValueMeasurementsRecurringMember 2026-03-31 0001126328 us-gaap:FairValueMeasurementsRecurringMember 2025-06-30 0001126328 us-gaap:FairValueMeasurementsRecurringMember 2025-03-31 0001126328 us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001126328 pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember 2026-06-30 0001126328 pfg:FundsWithheldPayableEmbeddedDerivativeMember us-gaap:FairValueMeasurementsRecurringMember 2026-06-30 0001126328 pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember 2026-03-31 0001126328 pfg:FundsWithheldPayableEmbeddedDerivativeMember us-gaap:FairValueMeasurementsRecurringMember 2026-03-31 0001126328 pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember 2025-12-31 0001126328 pfg:FundsWithheldPayableEmbeddedDerivativeMember us-gaap:FairValueMeasurementsRecurringMember 2025-12-31 0001126328 pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember 2025-06-30 0001126328 pfg:FundsWithheldPayableEmbeddedDerivativeMember us-gaap:FairValueMeasurementsRecurringMember 2025-06-30 0001126328 pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember 2025-03-31 0001126328 pfg:FundsWithheldPayableEmbeddedDerivativeMember us-gaap:FairValueMeasurementsRecurringMember 2025-03-31 0001126328 pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001126328 pfg:FundsWithheldPayableEmbeddedDerivativeMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001126328 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2026-06-30 0001126328 us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2026-06-30 0001126328 us-gaap:DebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2026-06-30 0001126328 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2026-06-30 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2026-06-30 0001126328 us-gaap:FixedMaturitiesMember us-gaap:FairValueMeasurementsRecurringMember 2026-06-30 0001126328 pfg:SeparateAccountAssetsMember us-gaap:FairValueMeasurementsRecurringMember 2026-06-30 0001126328 pfg:InvestmentsOtherMember us-gaap:FairValueMeasurementsRecurringMember 2026-06-30 0001126328 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2026-03-31 0001126328 us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2026-03-31 0001126328 us-gaap:DebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2026-03-31 0001126328 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2026-03-31 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2026-03-31 0001126328 us-gaap:FixedMaturitiesMember us-gaap:FairValueMeasurementsRecurringMember 2026-03-31 0001126328 pfg:SeparateAccountAssetsMember us-gaap:FairValueMeasurementsRecurringMember 2026-03-31 0001126328 pfg:InvestmentsOtherMember us-gaap:FairValueMeasurementsRecurringMember 2026-03-31 0001126328 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-12-31 0001126328 us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-12-31 0001126328 us-gaap:DebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-12-31 0001126328 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-12-31 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-12-31 0001126328 us-gaap:FixedMaturitiesMember us-gaap:FairValueMeasurementsRecurringMember 2025-12-31 0001126328 pfg:SeparateAccountAssetsMember us-gaap:FairValueMeasurementsRecurringMember 2025-12-31 0001126328 pfg:InvestmentsOtherMember us-gaap:FairValueMeasurementsRecurringMember 2025-12-31 0001126328 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-06-30 0001126328 us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-06-30 0001126328 us-gaap:DebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-06-30 0001126328 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-06-30 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-06-30 0001126328 us-gaap:FixedMaturitiesMember us-gaap:FairValueMeasurementsRecurringMember 2025-06-30 0001126328 pfg:SeparateAccountAssetsMember us-gaap:FairValueMeasurementsRecurringMember 2025-06-30 0001126328 pfg:InvestmentsOtherMember us-gaap:FairValueMeasurementsRecurringMember 2025-06-30 0001126328 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-03-31 0001126328 us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-03-31 0001126328 us-gaap:DebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-03-31 0001126328 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-03-31 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-03-31 0001126328 us-gaap:FixedMaturitiesMember us-gaap:FairValueMeasurementsRecurringMember 2025-03-31 0001126328 pfg:SeparateAccountAssetsMember us-gaap:FairValueMeasurementsRecurringMember 2025-03-31 0001126328 pfg:InvestmentsOtherMember us-gaap:FairValueMeasurementsRecurringMember 2025-03-31 0001126328 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2024-12-31 0001126328 us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2024-12-31 0001126328 us-gaap:DebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2024-12-31 0001126328 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2024-12-31 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2024-12-31 0001126328 us-gaap:MortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001126328 us-gaap:FixedMaturitiesMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001126328 pfg:SeparateAccountAssetsMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001126328 pfg:InvestmentsOtherMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2026-04-01 2026-06-30 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2026-01-01 2026-06-30 0001126328 us-gaap:MortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2025-01-01 2025-06-30 0001126328 us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember 2026-06-30 0001126328 us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember 2025-12-31 0001126328 us-gaap:RestrictedStockUnitsRSUMember 2026-01-01 2026-06-30 0001126328 us-gaap:RestrictedStockUnitsRSUMember 2026-06-30 0001126328 us-gaap:PerformanceSharesMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember 2025-12-31 0001126328 srt:WeightedAverageMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputPriceVolatilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLapseRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputNonPerformanceRiskMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputLongDurationInterestRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputPriceVolatilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLapseRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputNonPerformanceRiskMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputLongDurationInterestRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputPriceVolatilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLapseRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputNonPerformanceRiskMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputLongDurationInterestRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputPriceVolatilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:WeightedAverageMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLapseRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:WeightedAverageMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputNonPerformanceRiskMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:WeightedAverageMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputLongDurationInterestRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MinimumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputPriceVolatilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MinimumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLapseRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MinimumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputNonPerformanceRiskMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MinimumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputLongDurationInterestRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MaximumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputPriceVolatilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MaximumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLapseRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MaximumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputNonPerformanceRiskMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MaximumMember us-gaap:FairValueInputsLevel3Member pfg:InvestmentAndUniversalLifeContractsMember us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputLongDurationInterestRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInvestmentManagementMember 2026-01-01 2026-06-30 0001126328 pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2026-01-01 2026-06-30 0001126328 pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentSpecialtyBenefitsMember 2026-01-01 2026-06-30 0001126328 pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-01-01 2026-06-30 0001126328 pfg:SegmentCorporateMember 2026-01-01 2026-06-30 0001126328 pfg:StandardPoorsBPlusAndBelowRatingMember 2026-06-30 0001126328 pfg:StandardPoorsBBPlusThruBBMinusRatingMember 2026-06-30 0001126328 pfg:StandardPoorsBBBPlusThruBBBMinusRatingMember 2026-06-30 0001126328 pfg:StandardPoorsAMinusAndAboveRatingMember 2026-06-30 0001126328 pfg:EquityContractsMember pfg:EquityTotalReturnSwapsMember 2026-06-30 0001126328 pfg:CreditContractsMember pfg:CreditTotalReturnSwapsMember 2026-06-30 0001126328 us-gaap:SingleStockFutureMember 2026-06-30 0001126328 us-gaap:EmbeddedDerivativeFinancialInstrumentsMember 2026-06-30 0001126328 us-gaap:CreditDefaultSwapMember 2026-06-30 0001126328 pfg:InterestRateFutureMember 2026-06-30 0001126328 pfg:EquityContractsMember pfg:EquityTotalReturnSwapsMember 2025-12-31 0001126328 pfg:CreditContractsMember pfg:CreditTotalReturnSwapsMember 2025-12-31 0001126328 us-gaap:SingleStockFutureMember 2025-12-31 0001126328 us-gaap:EmbeddedDerivativeFinancialInstrumentsMember 2025-12-31 0001126328 us-gaap:CreditDefaultSwapMember 2025-12-31 0001126328 pfg:InterestRateFutureMember 2025-12-31 0001126328 us-gaap:OtherContractMember 2026-04-01 2026-06-30 0001126328 us-gaap:InterestRateContractMember 2026-04-01 2026-06-30 0001126328 us-gaap:ForeignExchangeContractMember 2026-04-01 2026-06-30 0001126328 us-gaap:EquityContractMember 2026-04-01 2026-06-30 0001126328 us-gaap:CreditRiskContractMember 2026-04-01 2026-06-30 0001126328 us-gaap:OtherContractMember 2026-01-01 2026-06-30 0001126328 us-gaap:InterestRateContractMember 2026-01-01 2026-06-30 0001126328 us-gaap:ForeignExchangeContractMember 2026-01-01 2026-06-30 0001126328 us-gaap:EquityContractMember 2026-01-01 2026-06-30 0001126328 us-gaap:CreditRiskContractMember 2026-01-01 2026-06-30 0001126328 us-gaap:OtherContractMember 2025-04-01 2025-06-30 0001126328 us-gaap:InterestRateContractMember 2025-04-01 2025-06-30 0001126328 us-gaap:ForeignExchangeContractMember 2025-04-01 2025-06-30 0001126328 us-gaap:EquityContractMember 2025-04-01 2025-06-30 0001126328 us-gaap:CreditRiskContractMember 2025-04-01 2025-06-30 0001126328 us-gaap:OtherContractMember 2025-01-01 2025-06-30 0001126328 us-gaap:InterestRateContractMember 2025-01-01 2025-06-30 0001126328 us-gaap:ForeignExchangeContractMember 2025-01-01 2025-06-30 0001126328 us-gaap:EquityContractMember 2025-01-01 2025-06-30 0001126328 us-gaap:CreditRiskContractMember 2025-01-01 2025-06-30 0001126328 srt:MaximumMember us-gaap:PensionPlansDefinedBenefitMember 2026-06-30 0001126328 us-gaap:PensionPlansDefinedBenefitMember 2026-04-01 2026-06-30 0001126328 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2026-04-01 2026-06-30 0001126328 us-gaap:PensionPlansDefinedBenefitMember 2026-01-01 2026-06-30 0001126328 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2026-01-01 2026-06-30 0001126328 us-gaap:PensionPlansDefinedBenefitMember 2025-04-01 2025-06-30 0001126328 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2025-04-01 2025-06-30 0001126328 us-gaap:PensionPlansDefinedBenefitMember 2025-01-01 2025-06-30 0001126328 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2025-01-01 2025-06-30 0001126328 pfg:InvestmentOnlyMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:OtherShortdurationInsuranceProductLineMember 2026-06-30 0001126328 us-gaap:OtherLongdurationInsuranceProductLineMember 2026-06-30 0001126328 pfg:InvestmentOnlyMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:OtherShortdurationInsuranceProductLineMember 2025-12-31 0001126328 us-gaap:OtherLongdurationInsuranceProductLineMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2024-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:SegmentRetirementAndIncomeSolutionsMember 2024-12-31 0001126328 pfg:InvestmentOnlyMember pfg:SegmentRetirementAndIncomeSolutionsMember 2024-12-31 0001126328 pfg:LongDurationAndShortDurationInsuranceMember 2026-04-01 2026-06-30 0001126328 us-gaap:TermLifeInsuranceMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-01-01 2026-06-30 0001126328 us-gaap:ParticipatingLifeInsurancePolicyMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-01-01 2026-06-30 0001126328 pfg:IndividualDisabilityMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentSpecialtyBenefitsMember 2026-01-01 2026-06-30 0001126328 pfg:PensionRiskTransferMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-01-01 2026-06-30 0001126328 pfg:InvestmentOnlyMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-01-01 2026-06-30 0001126328 pfg:LongDurationAndShortDurationInsuranceMember 2026-01-01 2026-06-30 0001126328 pfg:LongDurationAndShortDurationInsuranceMember 2025-04-01 2025-06-30 0001126328 us-gaap:TermLifeInsuranceMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-01-01 2025-12-31 0001126328 us-gaap:ParticipatingLifeInsurancePolicyMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-01-01 2025-12-31 0001126328 pfg:IndividualDisabilityMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentSpecialtyBenefitsMember 2025-01-01 2025-12-31 0001126328 pfg:PensionRiskTransferMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-01-01 2025-12-31 0001126328 pfg:InvestmentOnlyMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-01-01 2025-12-31 0001126328 pfg:LongDurationAndShortDurationInsuranceMember 2025-01-01 2025-06-30 0001126328 srt:WeightedAverageMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputEbitdaMultipleMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputEbitdaMultipleMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputEbitdaMultipleMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputEbitdaMultipleMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:WeightedAverageMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:WeightedAverageMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MinimumMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MinimumMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MaximumMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MaximumMember us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember us-gaap:MeasurementInputEbitdaMultipleMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:WeightedAverageMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputEbitdaMultipleMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputEbitdaMultipleMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputEbitdaMultipleMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:WeightedAverageMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:WeightedAverageMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:WeightedAverageMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputEbitdaMultipleMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:WeightedAverageMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:WeightedAverageMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:WeightedAverageMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MinimumMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MinimumMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MinimumMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MinimumMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MinimumMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MinimumMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MaximumMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MaximumMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MaximumMember us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MaximumMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MaximumMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputDiscountForLackOfMarketabilityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:MaximumMember us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputComparabilityAdjustmentMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember us-gaap:MeasurementInputEbitdaMultipleMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 us-gaap:CorporateDebtSecuritiesMember 2025-04-01 2025-06-30 0001126328 us-gaap:USTreasuryAndGovernmentMember 2026-04-01 2026-06-30 0001126328 us-gaap:OtherDebtSecuritiesMember 2026-04-01 2026-06-30 0001126328 us-gaap:USTreasuryAndGovernmentMember 2026-01-01 2026-06-30 0001126328 us-gaap:OtherDebtSecuritiesMember 2026-01-01 2026-06-30 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember 2026-04-01 2026-06-30 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember 2026-01-01 2026-06-30 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember 2025-04-01 2025-06-30 0001126328 us-gaap:CollateralizedDebtObligationsMember 2025-04-01 2025-06-30 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember 2025-01-01 2025-06-30 0001126328 us-gaap:CollateralizedDebtObligationsMember 2025-01-01 2025-06-30 0001126328 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USStatesAndPoliticalSubdivisionsMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:OtherDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CommercialMortgageBackedSecuritiesMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USTreasuryAndGovernmentMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USStatesAndPoliticalSubdivisionsMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:OtherDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CommercialMortgageBackedSecuritiesMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CollateralizedDebtObligationsMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USTreasuryAndGovernmentMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:USTreasuryAndGovernmentMember 2026-06-30 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:USStatesAndPoliticalSubdivisionsMember 2026-06-30 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2026-06-30 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:OtherDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:CommercialMortgageBackedSecuritiesMember 2026-06-30 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:CollateralizedDebtObligationsMember 2026-06-30 0001126328 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USStatesAndPoliticalSubdivisionsMember 2025-12-31 0001126328 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:OtherDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CommercialMortgageBackedSecuritiesMember 2025-12-31 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USTreasuryAndGovernmentMember 2025-12-31 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USStatesAndPoliticalSubdivisionsMember 2025-12-31 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2025-12-31 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:OtherDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CommercialMortgageBackedSecuritiesMember 2025-12-31 0001126328 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CollateralizedDebtObligationsMember 2025-12-31 0001126328 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:USTreasuryAndGovernmentMember 2025-12-31 0001126328 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:USTreasuryAndGovernmentMember 2025-12-31 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:USStatesAndPoliticalSubdivisionsMember 2025-12-31 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2025-12-31 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:OtherDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:ForeignGovernmentDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:CorporateDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:CommercialMortgageBackedSecuritiesMember 2025-12-31 0001126328 us-gaap:FairValueMeasurementsRecurringMember us-gaap:CollateralizedDebtObligationsMember 2025-12-31 0001126328 us-gaap:USTreasuryAndGovernmentMember 2026-03-31 0001126328 us-gaap:OtherDebtSecuritiesMember 2026-03-31 0001126328 us-gaap:CorporateDebtSecuritiesMember 2026-03-31 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember 2026-03-31 0001126328 us-gaap:OtherDebtSecuritiesMember 2025-06-30 0001126328 us-gaap:CorporateDebtSecuritiesMember 2025-06-30 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember 2025-06-30 0001126328 us-gaap:CollateralizedDebtObligationsMember 2025-06-30 0001126328 us-gaap:OtherDebtSecuritiesMember 2025-03-31 0001126328 us-gaap:CorporateDebtSecuritiesMember 2025-03-31 0001126328 us-gaap:OtherDebtSecuritiesMember 2024-12-31 0001126328 us-gaap:CorporateDebtSecuritiesMember 2024-12-31 0001126328 us-gaap:CorporateDebtSecuritiesMember 2026-01-01 2026-06-30 0001126328 pfg:NotesPayable5.3PercentDue2037Member us-gaap:SeniorNotesMember 2026-05-27 0001126328 pfg:MortgagesAndNotesPayableMember us-gaap:NonrecourseMember 2026-06-30 0001126328 pfg:NotesPayable6.05PercentDue2036Member 2026-06-30 0001126328 pfg:NotesPayable5.5PercentDue2053Member 2026-06-30 0001126328 pfg:NotesPayable5.3PercentDue2037Member 2026-06-30 0001126328 pfg:NotesPayable5.375PercentDue2033Member 2026-06-30 0001126328 pfg:NotesPayable4.625PercentDue2042Member 2026-06-30 0001126328 pfg:NotesPayable4.3PercentDue2046Member 2026-06-30 0001126328 pfg:NotesPayable4.35PercentDue2043Member 2026-06-30 0001126328 pfg:NotesPayable4.111PercentDue2028Member 2026-06-30 0001126328 pfg:NotesPayable3.7PercentDue2029Member 2026-06-30 0001126328 pfg:NotesPayable3.1PercentDue2026Member 2026-06-30 0001126328 pfg:NotesPayable2.125PercentDue2030Member 2026-06-30 0001126328 pfg:MortgagesAndNotesPayableMember us-gaap:NonrecourseMember 2025-12-31 0001126328 pfg:NotesPayable6.05PercentDue2036Member 2025-12-31 0001126328 pfg:NotesPayable5.5PercentDue2053Member 2025-12-31 0001126328 pfg:NotesPayable5.375PercentDue2033Member 2025-12-31 0001126328 pfg:NotesPayable4.625PercentDue2042Member 2025-12-31 0001126328 pfg:NotesPayable4.3PercentDue2046Member 2025-12-31 0001126328 pfg:NotesPayable4.35PercentDue2043Member 2025-12-31 0001126328 pfg:NotesPayable4.111PercentDue2028Member 2025-12-31 0001126328 pfg:NotesPayable3.7PercentDue2029Member 2025-12-31 0001126328 pfg:NotesPayable3.1PercentDue2026Member 2025-12-31 0001126328 pfg:NotesPayable2.125PercentDue2030Member 2025-12-31 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:FairValueHedgingMember pfg:NetRealizedCapitalGainsLosses 2026-04-01 2026-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:FairValueHedgingMember pfg:NetRealizedCapitalGainsLosses 2026-01-01 2026-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:FairValueHedgingMember pfg:NetRealizedCapitalGainsLosses 2025-04-01 2025-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:FairValueHedgingMember pfg:NetRealizedCapitalGainsLosses 2025-01-01 2025-06-30 0001126328 us-gaap:USTreasuryAndGovernmentMember 2026-06-30 0001126328 us-gaap:USStatesAndPoliticalSubdivisionsMember 2026-06-30 0001126328 us-gaap:ResidentialMortgageBackedSecuritiesMember 2026-06-30 0001126328 us-gaap:OtherDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:ForeignGovernmentDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:CorporateDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember 2026-06-30 0001126328 us-gaap:CollateralizedDebtObligationsMember 2026-06-30 0001126328 us-gaap:USTreasuryAndGovernmentMember 2025-12-31 0001126328 us-gaap:USStatesAndPoliticalSubdivisionsMember 2025-12-31 0001126328 us-gaap:ResidentialMortgageBackedSecuritiesMember 2025-12-31 0001126328 us-gaap:OtherDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:ForeignGovernmentDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:CorporateDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:CommercialMortgageBackedSecuritiesMember 2025-12-31 0001126328 us-gaap:CollateralizedDebtObligationsMember 2025-12-31 0001126328 us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2026-06-30 0001126328 us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember 2026-06-30 0001126328 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2026-06-30 0001126328 pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2026-06-30 0001126328 pfg:InvestmentsOtherMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2026-06-30 0001126328 us-gaap:OtherDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-12-31 0001126328 us-gaap:DebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:TradingSecuritiesMember 2025-12-31 0001126328 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:AvailableForSaleSecurityMember 2025-12-31 0001126328 pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2025-12-31 0001126328 pfg:InvestmentsOtherMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2025-12-31 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:TradingSecuritiesMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2026-06-30 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:TradingSecuritiesMember us-gaap:OtherDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:TradingSecuritiesMember us-gaap:CommercialMortgageBackedSecuritiesMember 2026-06-30 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:TradingSecuritiesMember us-gaap:CollateralizedDebtObligationsMember 2026-06-30 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:AvailableForSaleSecurityMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2026-06-30 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:AvailableForSaleSecurityMember us-gaap:OtherDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:AvailableForSaleSecurityMember us-gaap:CorporateDebtSecuritiesMember 2026-06-30 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:AvailableForSaleSecurityMember us-gaap:CommercialMortgageBackedSecuritiesMember 2026-06-30 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:AvailableForSaleSecurityMember us-gaap:CollateralizedDebtObligationsMember 2026-06-30 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember us-gaap:EquitySecuritiesMember 2026-06-30 0001126328 pfg:VariableInterestEntityPrimaryBeneficiarySponsoredInvestmentFundsMember 2026-06-30 0001126328 pfg:VariableInterestEntityPrimaryBeneficiaryResidentialMortgageLoansMember 2026-06-30 0001126328 pfg:VariableInterestEntityPrimaryBeneficiaryRealEstateMember 2026-06-30 0001126328 pfg:VariableInterestEntityPrimaryBeneficiaryMandatoryRetirementSavingsMember 2026-06-30 0001126328 pfg:VariableInterestEntityPrimaryBeneficiaryAssetBackedLimitedPartnershipMember 2026-06-30 0001126328 pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:SegmentPrincipalAssetManagementMember 2026-06-30 0001126328 pfg:SegmentCorporateMember 2026-06-30 0001126328 pfg:SegmentBenefitsAndProtectionMember 2026-06-30 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:TradingSecuritiesMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2025-12-31 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:TradingSecuritiesMember us-gaap:OtherDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:TradingSecuritiesMember us-gaap:CommercialMortgageBackedSecuritiesMember 2025-12-31 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:TradingSecuritiesMember us-gaap:CollateralizedDebtObligationsMember 2025-12-31 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:AvailableForSaleSecurityMember us-gaap:ResidentialMortgageBackedSecuritiesMember 2025-12-31 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:AvailableForSaleSecurityMember us-gaap:OtherDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:AvailableForSaleSecurityMember us-gaap:CorporateDebtSecuritiesMember 2025-12-31 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:AvailableForSaleSecurityMember us-gaap:CommercialMortgageBackedSecuritiesMember 2025-12-31 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:AvailableForSaleSecurityMember us-gaap:CollateralizedDebtObligationsMember 2025-12-31 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember us-gaap:EquitySecuritiesMember 2025-12-31 0001126328 pfg:VariableInterestEntityPrimaryBeneficiarySponsoredInvestmentFundsMember 2025-12-31 0001126328 pfg:VariableInterestEntityPrimaryBeneficiaryResidentialMortgageLoansMember 2025-12-31 0001126328 pfg:VariableInterestEntityPrimaryBeneficiaryRealEstateMember 2025-12-31 0001126328 pfg:VariableInterestEntityPrimaryBeneficiaryMandatoryRetirementSavingsMember 2025-12-31 0001126328 pfg:VariableInterestEntityPrimaryBeneficiaryAssetBackedLimitedPartnershipMember 2025-12-31 0001126328 pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:SegmentPrincipalAssetManagementMember 2025-12-31 0001126328 pfg:SegmentCorporateMember 2025-12-31 0001126328 pfg:SegmentBenefitsAndProtectionMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2024-12-31 0001126328 us-gaap:FixedAnnuityMember srt:LatinAmericaMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2026-06-30 0001126328 pfg:PensionRiskTransferMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:FixedAnnuityMember srt:LatinAmericaMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2025-12-31 0001126328 pfg:PensionRiskTransferMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:FixedAnnuityMember srt:LatinAmericaMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2024-12-31 0001126328 us-gaap:FixedAnnuityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2024-12-31 0001126328 pfg:PensionRiskTransferMember pfg:SegmentRetirementAndIncomeSolutionsMember 2024-12-31 0001126328 pfg:LongTermCareInsuranceMember pfg:SegmentCorporateMember 2024-12-31 0001126328 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2026-06-30 0001126328 us-gaap:VariableInterestEntityPrimaryBeneficiaryMember 2025-12-31 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:OtherLimitedPartnershipAndFundInterestsMember 2026-06-30 0001126328 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember pfg:OtherLimitedPartnershipAndFundInterestsMember 2025-12-31 0001126328 pfg:SegmentBenefitsAndProtectionMember 2026-01-01 2026-06-30 0001126328 us-gaap:CommonStockMember 2025-02-01 2025-02-28 0001126328 us-gaap:CommonStockMember 2024-02-01 2024-02-29 0001126328 us-gaap:RetainedEarningsMember 2026-04-01 2026-06-30 0001126328 us-gaap:AdditionalPaidInCapitalMember 2026-04-01 2026-06-30 0001126328 us-gaap:RetainedEarningsMember 2026-01-01 2026-06-30 0001126328 us-gaap:AdditionalPaidInCapitalMember 2026-01-01 2026-06-30 0001126328 us-gaap:RetainedEarningsMember 2025-04-01 2025-06-30 0001126328 us-gaap:AdditionalPaidInCapitalMember 2025-04-01 2025-06-30 0001126328 us-gaap:RetainedEarningsMember 2025-01-01 2025-06-30 0001126328 us-gaap:AdditionalPaidInCapitalMember 2025-01-01 2025-06-30 0001126328 pfg:SegmentRetirementAndIncomeSolutionsMember 2026-01-01 2026-06-30 0001126328 pfg:StockBasedCompensationPlansMember 2026-01-01 2026-06-30 0001126328 pfg:StockBasedCompensationPlansMember 2025-01-01 2025-06-30 0001126328 pfg:StockBasedCompensationDirectorsStockPlanStockIncentivePlanAmendedAndRestatedStockIncentivePlanDirectorsStockPlanMember 2026-06-30 0001126328 us-gaap:PerformanceSharesMember 2026-01-01 2026-06-30 0001126328 pfg:GroupRetirementContractsProductMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-01-01 2026-06-30 0001126328 pfg:GroupRetirementContractsProductMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-01-01 2025-12-31 0001126328 pfg:PensionMember srt:LatinAmericaMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2026-01-01 2026-06-30 0001126328 pfg:PensionMember srt:LatinAmericaMember pfg:SegmentPrincipalAssetManagementMember pfg:SubsegmentInternationalPensionMember 2025-01-01 2025-12-31 0001126328 srt:WeightedAverageMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLongTermRevenueGrowthRateMember pfg:DiscountedCashFlowRealEstateMember 2026-06-30 0001126328 srt:WeightedAverageMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDiscountRateMember pfg:DiscountedCashFlowRealEstateMember 2026-06-30 0001126328 srt:WeightedAverageMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputTerminalCapitalizationRateMember pfg:DiscountedCashFlowRealEstateMember 2026-06-30 0001126328 srt:WeightedAverageMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputMarketInterestRateMember pfg:DiscountedCashFlowRealEstateDebtMember 2026-06-30 0001126328 srt:WeightedAverageMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputLoanToValueRatioMember pfg:DiscountedCashFlowRealEstateDebtMember 2026-06-30 0001126328 srt:MinimumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLongTermRevenueGrowthRateMember pfg:DiscountedCashFlowRealEstateMember 2026-06-30 0001126328 srt:MinimumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDiscountRateMember pfg:DiscountedCashFlowRealEstateMember 2026-06-30 0001126328 srt:MinimumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputTerminalCapitalizationRateMember pfg:DiscountedCashFlowRealEstateMember 2026-06-30 0001126328 srt:MinimumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputMarketInterestRateMember pfg:DiscountedCashFlowRealEstateDebtMember 2026-06-30 0001126328 srt:MinimumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputLoanToValueRatioMember pfg:DiscountedCashFlowRealEstateDebtMember 2026-06-30 0001126328 srt:MaximumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLongTermRevenueGrowthRateMember pfg:DiscountedCashFlowRealEstateMember 2026-06-30 0001126328 srt:MaximumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDiscountRateMember pfg:DiscountedCashFlowRealEstateMember 2026-06-30 0001126328 srt:MaximumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputTerminalCapitalizationRateMember pfg:DiscountedCashFlowRealEstateMember 2026-06-30 0001126328 srt:MaximumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputMarketInterestRateMember pfg:DiscountedCashFlowRealEstateDebtMember 2026-06-30 0001126328 srt:MaximumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputLoanToValueRatioMember pfg:DiscountedCashFlowRealEstateDebtMember 2026-06-30 0001126328 srt:WeightedAverageMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLongTermRevenueGrowthRateMember pfg:DiscountedCashFlowRealEstateMember 2025-12-31 0001126328 srt:WeightedAverageMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDiscountRateMember pfg:DiscountedCashFlowRealEstateMember 2025-12-31 0001126328 srt:WeightedAverageMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputTerminalCapitalizationRateMember pfg:DiscountedCashFlowRealEstateMember 2025-12-31 0001126328 srt:WeightedAverageMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputMarketInterestRateMember pfg:DiscountedCashFlowRealEstateDebtMember 2025-12-31 0001126328 srt:WeightedAverageMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputLoanToValueRatioMember pfg:DiscountedCashFlowRealEstateDebtMember 2025-12-31 0001126328 srt:MinimumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLongTermRevenueGrowthRateMember pfg:DiscountedCashFlowRealEstateMember 2025-12-31 0001126328 srt:MinimumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDiscountRateMember pfg:DiscountedCashFlowRealEstateMember 2025-12-31 0001126328 srt:MinimumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputTerminalCapitalizationRateMember pfg:DiscountedCashFlowRealEstateMember 2025-12-31 0001126328 srt:MinimumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputMarketInterestRateMember pfg:DiscountedCashFlowRealEstateDebtMember 2025-12-31 0001126328 srt:MinimumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputLoanToValueRatioMember pfg:DiscountedCashFlowRealEstateDebtMember 2025-12-31 0001126328 srt:MaximumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLongTermRevenueGrowthRateMember pfg:DiscountedCashFlowRealEstateMember 2025-12-31 0001126328 srt:MaximumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDiscountRateMember pfg:DiscountedCashFlowRealEstateMember 2025-12-31 0001126328 srt:MaximumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputTerminalCapitalizationRateMember pfg:DiscountedCashFlowRealEstateMember 2025-12-31 0001126328 srt:MaximumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputMarketInterestRateMember pfg:DiscountedCashFlowRealEstateDebtMember 2025-12-31 0001126328 srt:MaximumMember pfg:SeparateAccountAssetsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember pfg:MeasurementInputLoanToValueRatioMember pfg:DiscountedCashFlowRealEstateDebtMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:VariableAnnuityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-06-30 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:UniversalLifeMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember us-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember us-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Member pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:VariableAnnuityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-12-31 0001126328 us-gaap:CashFlowHedgingMember pfg:BenefitsClaimsAndSettlementExpenses 2026-04-01 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2026-01-01 2026-06-30 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-01-01 2026-06-30 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:SegmentRetirementAndIncomeSolutionsMember 2026-01-01 2026-06-30 0001126328 us-gaap:UniversalLifeMember pfg:SegmentBenefitsAndProtectionMember pfg:SubsegmentLifeInsuranceMember 2025-01-01 2025-12-31 0001126328 us-gaap:DeferredFixedAnnuityMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-01-01 2025-12-31 0001126328 pfg:WorkplaceSavingsAndRetirementSolutionsMember pfg:SegmentRetirementAndIncomeSolutionsMember 2025-01-01 2025-12-31 0001126328 us-gaap:InterestRateContractMember us-gaap:FairValueHedgingMember pfg:NetInvestmentIncomeLoss 2026-04-01 2026-06-30 0001126328 us-gaap:InterestRateContractMember us-gaap:FairValueHedgingMember pfg:BenefitsClaimsAndSettlementExpenses 2026-04-01 2026-06-30 0001126328 us-gaap:InterestRateContractMember us-gaap:CashFlowHedgingMember pfg:NetInvestmentIncomeLoss 2026-04-01 2026-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:FairValueHedgingMember pfg:NetInvestmentIncomeLoss 2026-04-01 2026-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:CashFlowHedgingMember pfg:NetInvestmentIncomeLoss 2026-04-01 2026-06-30 0001126328 us-gaap:InterestRateContractMember us-gaap:FairValueHedgingMember pfg:NetInvestmentIncomeLoss 2026-01-01 2026-06-30 0001126328 us-gaap:InterestRateContractMember us-gaap:FairValueHedgingMember pfg:BenefitsClaimsAndSettlementExpenses 2026-01-01 2026-06-30 0001126328 us-gaap:InterestRateContractMember us-gaap:CashFlowHedgingMember pfg:NetInvestmentIncomeLoss 2026-01-01 2026-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:FairValueHedgingMember pfg:NetInvestmentIncomeLoss 2026-01-01 2026-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:CashFlowHedgingMember pfg:NetInvestmentIncomeLoss 2026-01-01 2026-06-30 0001126328 us-gaap:InterestRateContractMember us-gaap:FairValueHedgingMember pfg:NetInvestmentIncomeLoss 2025-04-01 2025-06-30 0001126328 us-gaap:InterestRateContractMember us-gaap:FairValueHedgingMember pfg:BenefitsClaimsAndSettlementExpenses 2025-04-01 2025-06-30 0001126328 us-gaap:InterestRateContractMember us-gaap:CashFlowHedgingMember pfg:NetInvestmentIncomeLoss 2025-04-01 2025-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:FairValueHedgingMember pfg:NetInvestmentIncomeLoss 2025-04-01 2025-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:CashFlowHedgingMember pfg:NetInvestmentIncomeLoss 2025-04-01 2025-06-30 0001126328 us-gaap:InterestRateContractMember us-gaap:FairValueHedgingMember pfg:NetInvestmentIncomeLoss 2025-01-01 2025-06-30 0001126328 us-gaap:InterestRateContractMember us-gaap:FairValueHedgingMember pfg:BenefitsClaimsAndSettlementExpenses 2025-01-01 2025-06-30 0001126328 us-gaap:InterestRateContractMember us-gaap:CashFlowHedgingMember pfg:NetInvestmentIncomeLoss 2025-01-01 2025-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:FairValueHedgingMember pfg:NetInvestmentIncomeLoss 2025-01-01 2025-06-30 0001126328 us-gaap:ForeignExchangeContractMember us-gaap:CashFlowHedgingMember pfg:NetInvestmentIncomeLoss 2025-01-01 2025-06-30 0001126328 srt:RetailSiteMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 srt:OtherPropertyMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 srt:OfficeBuildingMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 srt:IndustrialPropertyMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 srt:HotelMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 srt:ApartmentBuildingMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 pfg:WestSouthCentralMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 pfg:WestNorthCentralMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 pfg:SouthAtlanticMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 pfg:PacificMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 pfg:NewEnglandMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 pfg:MountainMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 pfg:MiddleAtlanticMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 pfg:InternationalMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 pfg:EastSouthCentralMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 pfg:EastNorthCentralMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2026-06-30 0001126328 srt:RetailSiteMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 srt:OtherPropertyMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 srt:OfficeBuildingMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 srt:IndustrialPropertyMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 srt:HotelMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 srt:ApartmentBuildingMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 pfg:WestSouthCentralMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 pfg:WestNorthCentralMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 pfg:SouthAtlanticMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 pfg:PacificMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 pfg:NewEnglandMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 pfg:MountainMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 pfg:MiddleAtlanticMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 pfg:InternationalMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 pfg:EastSouthCentralMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 pfg:EastNorthCentralMember us-gaap:CommercialRealEstatePortfolioSegmentMember 2025-12-31 0001126328 srt:WeightedAverageMember pfg:InvestmentsOtherMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLossSeverityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember pfg:InvestmentsOtherMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember pfg:InvestmentsOtherMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDefaultRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember pfg:InvestmentsOtherMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLossSeverityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember pfg:InvestmentsOtherMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MinimumMember pfg:InvestmentsOtherMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDefaultRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember pfg:InvestmentsOtherMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLossSeverityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember pfg:InvestmentsOtherMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:MaximumMember pfg:InvestmentsOtherMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDefaultRateMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2026-06-30 0001126328 srt:WeightedAverageMember pfg:InvestmentsOtherMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputLossSeverityMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-12-31 0001126328 srt:WeightedAverageMember pfg:InvestmentsOtherMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:MeasurementInputDiscountRateMember us-gaap:ValuationTechni