0001126328--12-312023Q1falsehttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20230331#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20230331#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20230331#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20230331#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20230331#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20230331#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20230331#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20230331#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20230331#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20230331#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20230331#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20230331#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20230331#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20230331#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20230331#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20230331#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20230331#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20230331#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20230331#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMember1401000003387000000001126328us-gaap:TreasuryStockCommonMember2023-01-012023-03-310001126328us-gaap:TreasuryStockCommonMember2022-01-012022-03-310001126328us-gaap:TreasuryStockCommonMember2023-03-310001126328us-gaap:RetainedEarningsMember2023-03-310001126328us-gaap:NoncontrollingInterestMember2023-03-310001126328us-gaap:AdditionalPaidInCapitalMember2023-03-310001126328us-gaap:TreasuryStockCommonMember2022-12-310001126328us-gaap:RetainedEarningsMember2022-12-310001126328us-gaap:NoncontrollingInterestMember2022-12-310001126328us-gaap:AdditionalPaidInCapitalMember2022-12-310001126328us-gaap:TreasuryStockCommonMember2022-03-310001126328us-gaap:RetainedEarningsMember2022-03-310001126328us-gaap:NoncontrollingInterestMember2022-03-310001126328us-gaap:AdditionalPaidInCapitalMember2022-03-310001126328us-gaap:TreasuryStockCommonMember2021-12-310001126328us-gaap:RetainedEarningsMember2021-12-310001126328us-gaap:NoncontrollingInterestMember2021-12-310001126328us-gaap:AdditionalPaidInCapitalMember2021-12-310001126328us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskIncludingNoncontrollingInterestMember2023-03-310001126328us-gaap:AociLiabilityForFuturePolicyBenefitIncludingNoncontrollingInterestMember2023-03-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2023-03-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-03-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-03-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2023-03-310001126328us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskIncludingNoncontrollingInterestMember2022-12-310001126328us-gaap:AociLiabilityForFuturePolicyBenefitIncludingNoncontrollingInterestMember2022-12-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2022-12-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-12-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-12-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-12-310001126328us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskIncludingNoncontrollingInterestMember2022-03-310001126328us-gaap:AociLiabilityForFuturePolicyBenefitIncludingNoncontrollingInterestMember2022-03-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2022-03-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-03-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-03-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-03-310001126328us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskIncludingNoncontrollingInterestMember2021-12-310001126328us-gaap:AociLiabilityForFuturePolicyBenefitIncludingNoncontrollingInterestMember2021-12-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2021-12-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-12-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-12-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-12-310001126328us-gaap:CommonStockMember2023-03-310001126328us-gaap:CommonStockMember2022-12-310001126328us-gaap:CommonStockMember2022-03-310001126328us-gaap:CommonStockMember2021-12-310001126328pfg:StockBasedCompensationPlans2021StockIncentivePlanMember2023-03-310001126328pfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:PensionMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2021-12-310001126328pfg:GroupRetirementContractsProductMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-12-310001126328pfg:PensionMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:GroupRetirementContractsProductMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:PensionMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:GroupRetirementContractsProductMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:UnearnedRevenueLiabilityMember2023-01-012023-03-310001126328pfg:MarketRiskBenefitNetAmountAtRiskMember2023-01-012023-03-310001126328pfg:LiabilityForFuturePolicyBenefitsMember2023-01-012023-03-310001126328pfg:DeferredPolicyAcquisitionCostsMember2023-01-012023-03-310001126328us-gaap:USTreasuryAndGovernmentMemberus-gaap:SeparateAccountDebtSecurityMember2023-03-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:SeparateAccountDebtSecurityMember2023-03-310001126328us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:SeparateAccountDebtSecurityMember2023-03-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:SeparateAccountDebtSecurityMember2023-03-310001126328us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:SeparateAccountDebtSecurityMember2023-03-310001126328us-gaap:DebtSecuritiesMemberus-gaap:SeparateAccountDebtSecurityMember2023-03-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:SeparateAccountDebtSecurityMember2023-03-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:SeparateAccountDebtSecurityMember2023-03-310001126328us-gaap:SeparateAccountRealEstateMember2023-03-310001126328us-gaap:SeparateAccountEquitySecurityMember2023-03-310001126328us-gaap:SeparateAccountCashAndCashEquivalentsMember2023-03-310001126328pfg:SeparateAccountOtherInvestmentsMember2023-03-310001126328pfg:SeparateAccountOtherAssetsMember2023-03-310001126328us-gaap:USTreasuryAndGovernmentMemberus-gaap:SeparateAccountDebtSecurityMember2022-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:SeparateAccountDebtSecurityMember2022-12-310001126328us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:SeparateAccountDebtSecurityMember2022-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:SeparateAccountDebtSecurityMember2022-12-310001126328us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:SeparateAccountDebtSecurityMember2022-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:SeparateAccountDebtSecurityMember2022-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:SeparateAccountDebtSecurityMember2022-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:SeparateAccountDebtSecurityMember2022-12-310001126328us-gaap:SeparateAccountRealEstateMember2022-12-310001126328us-gaap:SeparateAccountEquitySecurityMember2022-12-310001126328us-gaap:SeparateAccountCashAndCashEquivalentsMember2022-12-310001126328pfg:SeparateAccountOtherInvestmentsMember2022-12-310001126328pfg:SeparateAccountOtherAssetsMember2022-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalGlobalInvestorsMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalGlobalInvestorsMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentSpecialtyBenefitsMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMembersrt:AsiaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberpfg:SubsegmentGeographicalAreaEliminationsMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentCorporateMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:DepositAccountMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalAssetManagementEliminationsMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberpfg:ProductsAndServicesEliminationsMemberpfg:SegmentCorporateMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentCorporateMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalGlobalInvestorsMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalGlobalInvestorsMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentSpecialtyBenefitsMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMembersrt:AsiaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberpfg:SubsegmentGeographicalAreaEliminationsMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentCorporateMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:DepositAccountMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalAssetManagementEliminationsMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberpfg:ProductsAndServicesEliminationsMemberpfg:SegmentCorporateMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentCorporateMember2022-01-012022-03-310001126328pfg:OperatingExpensesMemberus-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2023-01-012023-03-310001126328pfg:NetRealizedCapitalGainsLossesMemberus-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2023-01-012023-03-310001126328pfg:OperatingExpensesMemberus-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2022-01-012022-03-310001126328pfg:NetRealizedCapitalGainsLossesMemberus-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2022-01-012022-03-310001126328us-gaap:IntersegmentEliminationMemberpfg:SegmentCorporateMember2023-03-310001126328us-gaap:IntersegmentEliminationMemberpfg:SegmentCorporateMember2022-12-310001126328us-gaap:UniversalLifeMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:UniversalLifeMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MinimumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:MaximumMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2023-01-012023-03-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-01-012022-03-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2023-01-012023-03-310001126328us-gaap:NetInvestmentHedgingMember2023-01-012023-03-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2022-01-012022-03-310001126328us-gaap:NetInvestmentHedgingMember2022-01-012022-03-310001126328pfg:InvestmentContractMemberus-gaap:InterestRateContractMember2023-01-012023-03-310001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:InterestRateContractMember2023-01-012023-03-310001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:ForeignExchangeContractMember2023-01-012023-03-310001126328pfg:InvestmentContractMemberus-gaap:InterestRateContractMember2022-01-012022-03-310001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:InterestRateContractMember2022-01-012022-03-310001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:ForeignExchangeContractMember2022-01-012022-03-310001126328us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2023-01-012023-03-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2023-01-012023-03-310001126328us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2022-01-012022-03-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2022-01-012022-03-310001126328us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2023-01-012023-03-310001126328us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskIncludingNoncontrollingInterestMember2023-01-012023-03-310001126328us-gaap:AociLiabilityForFuturePolicyBenefitIncludingNoncontrollingInterestMember2023-01-012023-03-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2023-01-012023-03-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2023-01-012023-03-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2023-01-012023-03-310001126328us-gaap:AociMarketRiskBenefitInstrumentSpecificCreditRiskIncludingNoncontrollingInterestMember2022-01-012022-03-310001126328us-gaap:AociLiabilityForFuturePolicyBenefitIncludingNoncontrollingInterestMember2022-01-012022-03-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2022-01-012022-03-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-01-012022-03-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-01-012022-03-310001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2023-01-012023-03-310001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2022-01-012022-03-310001126328us-gaap:AssetPledgedAsCollateralMemberus-gaap:FederalHomeLoanBankAdvancesMember2023-03-310001126328us-gaap:AssetPledgedAsCollateralMemberus-gaap:FederalHomeLoanBankAdvancesMember2022-12-310001126328pfg:GuaranteedPensionMembersrt:ScenarioPreviouslyReportedMembersrt:AsiaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2020-12-310001126328us-gaap:VariableAnnuityMemberpfg:MarketRiskBenefitsRetainedEarningsAdjustmentForValuationOfContractsAsMrbsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328us-gaap:VariableAnnuityMemberpfg:MarketRiskBenefitsCumulativeEffectOfChangesInNonperformanceRiskBetweenOriginalContractIssueDateAndTransitionDateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:MarketRiskBenefitsRetainedEarningsAdjustmentForValuationOfContractsAsMrbsMember2020-12-310001126328pfg:MarketRiskBenefitsCumulativeEffectOfChangesInNonperformanceRiskBetweenOriginalContractIssueDateAndTransitionDateMember2020-12-310001126328pfg:GuaranteedPensionMembersrt:WeightedAverageMembersrt:AsiaMemberus-gaap:MeasurementInputPriceVolatilityMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:GuaranteedPensionMembersrt:WeightedAverageMembersrt:AsiaMemberus-gaap:MeasurementInputLapseRateMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:GuaranteedPensionMembersrt:WeightedAverageMembersrt:AsiaMemberpfg:MeasurementInputNonPerformanceRiskMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:GuaranteedPensionMembersrt:WeightedAverageMembersrt:AsiaMemberpfg:MeasurementInputLongDurationInterestRateMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:GuaranteedPensionMembersrt:MinimumMembersrt:AsiaMemberus-gaap:MeasurementInputPriceVolatilityMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:GuaranteedPensionMembersrt:MinimumMembersrt:AsiaMemberus-gaap:MeasurementInputLapseRateMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:GuaranteedPensionMembersrt:MinimumMembersrt:AsiaMemberpfg:MeasurementInputNonPerformanceRiskMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:GuaranteedPensionMembersrt:MinimumMembersrt:AsiaMemberpfg:MeasurementInputLongDurationInterestRateMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:GuaranteedPensionMembersrt:MaximumMembersrt:AsiaMemberus-gaap:MeasurementInputPriceVolatilityMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:GuaranteedPensionMembersrt:MaximumMembersrt:AsiaMemberus-gaap:MeasurementInputLapseRateMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:GuaranteedPensionMembersrt:MaximumMembersrt:AsiaMemberpfg:MeasurementInputNonPerformanceRiskMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:GuaranteedPensionMembersrt:MaximumMembersrt:AsiaMemberpfg:MeasurementInputLongDurationInterestRateMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:WeightedAverageMemberus-gaap:MeasurementInputPriceVolatilityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:WeightedAverageMemberus-gaap:MeasurementInputLapseRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:WeightedAverageMemberpfg:MeasurementInputNonPerformanceRiskMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:WeightedAverageMemberpfg:MeasurementInputLongDurationInterestRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberus-gaap:MeasurementInputPriceVolatilityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberus-gaap:MeasurementInputLapseRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberpfg:MeasurementInputNonPerformanceRiskMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberpfg:MeasurementInputLongDurationInterestRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberus-gaap:MeasurementInputPriceVolatilityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberus-gaap:MeasurementInputLapseRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberpfg:MeasurementInputNonPerformanceRiskMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberpfg:MeasurementInputLongDurationInterestRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:GuaranteedPensionMembersrt:WeightedAverageMembersrt:AsiaMemberus-gaap:MeasurementInputPriceVolatilityMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:GuaranteedPensionMembersrt:WeightedAverageMembersrt:AsiaMemberus-gaap:MeasurementInputLapseRateMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:GuaranteedPensionMembersrt:WeightedAverageMembersrt:AsiaMemberpfg:MeasurementInputNonPerformanceRiskMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:GuaranteedPensionMembersrt:WeightedAverageMembersrt:AsiaMemberpfg:MeasurementInputLongDurationInterestRateMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:GuaranteedPensionMembersrt:MinimumMembersrt:AsiaMemberus-gaap:MeasurementInputPriceVolatilityMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:GuaranteedPensionMembersrt:MinimumMembersrt:AsiaMemberus-gaap:MeasurementInputLapseRateMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:GuaranteedPensionMembersrt:MinimumMembersrt:AsiaMemberpfg:MeasurementInputNonPerformanceRiskMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:GuaranteedPensionMembersrt:MinimumMembersrt:AsiaMemberpfg:MeasurementInputLongDurationInterestRateMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:GuaranteedPensionMembersrt:MaximumMembersrt:AsiaMemberus-gaap:MeasurementInputPriceVolatilityMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:GuaranteedPensionMembersrt:MaximumMembersrt:AsiaMemberus-gaap:MeasurementInputLapseRateMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:GuaranteedPensionMembersrt:MaximumMembersrt:AsiaMemberpfg:MeasurementInputNonPerformanceRiskMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:GuaranteedPensionMembersrt:MaximumMembersrt:AsiaMemberpfg:MeasurementInputLongDurationInterestRateMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:WeightedAverageMemberus-gaap:MeasurementInputPriceVolatilityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:WeightedAverageMemberus-gaap:MeasurementInputLapseRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:WeightedAverageMemberpfg:MeasurementInputNonPerformanceRiskMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:WeightedAverageMemberpfg:MeasurementInputLongDurationInterestRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberus-gaap:MeasurementInputPriceVolatilityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberus-gaap:MeasurementInputLapseRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberpfg:MeasurementInputNonPerformanceRiskMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MinimumMemberpfg:MeasurementInputLongDurationInterestRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberus-gaap:MeasurementInputPriceVolatilityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberus-gaap:MeasurementInputLapseRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberpfg:MeasurementInputNonPerformanceRiskMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMembersrt:MaximumMemberpfg:MeasurementInputLongDurationInterestRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:FixedAnnuityMembersrt:ScenarioPreviouslyReportedMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2020-12-310001126328us-gaap:FixedAnnuityMemberpfg:AociGainLossReversalAdjustmentLdtiMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2020-12-310001126328us-gaap:FixedAnnuityMemberpfg:AociGainLossRemeasurementAdjustmentDiscountRateMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2020-12-310001126328us-gaap:FixedAnnuityMemberpfg:AdjustmentFromEffectOfModifiedRetrospectiveApplicationLdtiMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2020-12-310001126328us-gaap:TermLifeInsuranceMemberpfg:AociGainLossRemeasurementAdjustmentDiscountRateMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2020-12-310001126328us-gaap:TermLifeInsuranceMemberpfg:AdjustmentFromEffectOfModifiedRetrospectiveApplicationLdtiMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2020-12-310001126328pfg:IndividualDisabilityMemberpfg:AociGainLossReversalAdjustmentLdtiMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentSpecialtyBenefitsMember2020-12-310001126328pfg:IndividualDisabilityMemberpfg:AociGainLossRemeasurementAdjustmentDiscountRateMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentSpecialtyBenefitsMember2020-12-310001126328pfg:IndividualDisabilityMemberpfg:AdjustmentFromEffectOfModifiedRetrospectiveApplicationLdtiMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentSpecialtyBenefitsMember2020-12-310001126328us-gaap:FixedAnnuityMembersrt:ScenarioPreviouslyReportedMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328us-gaap:FixedAnnuityMemberpfg:AociGainLossReversalAdjustmentLdtiMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328us-gaap:FixedAnnuityMemberpfg:AociGainLossRemeasurementAdjustmentDiscountRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328us-gaap:FixedAnnuityMemberpfg:AdjustmentFromEffectOfModifiedRetrospectiveApplicationLdtiMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:PensionRiskTransferMembersrt:ScenarioPreviouslyReportedMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:PensionRiskTransferMemberpfg:AociGainLossReversalAdjustmentLdtiMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:PensionRiskTransferMemberpfg:AociGainLossRemeasurementAdjustmentDiscountRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:LongTermCareInsuranceMembersrt:ScenarioPreviouslyReportedMemberpfg:SegmentCorporateMember2020-12-310001126328pfg:LongTermCareInsuranceMemberpfg:AociGainLossRemeasurementAdjustmentDiscountRateMemberpfg:SegmentCorporateMember2020-12-310001126328pfg:LongTermCareInsuranceMemberpfg:AdjustmentFromEffectOfModifiedRetrospectiveApplicationLdtiMemberpfg:SegmentCorporateMember2020-12-310001126328pfg:AociGainLossReversalAdjustmentLdtiMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:AociGainLossReversalAdjustmentLdtiMemberpfg:SegmentBenefitsAndProtectionMember2020-12-310001126328pfg:AociGainLossRemeasurementAdjustmentDiscountRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:AociGainLossRemeasurementAdjustmentDiscountRateMemberpfg:SegmentBenefitsAndProtectionMember2020-12-310001126328pfg:AdjustmentFromEffectOfModifiedRetrospectiveApplicationLdtiMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:AdjustmentFromEffectOfModifiedRetrospectiveApplicationLdtiMemberpfg:SegmentBenefitsAndProtectionMember2020-12-310001126328pfg:AociGainLossReversalAdjustmentLdtiMember2020-12-310001126328pfg:AociGainLossRemeasurementAdjustmentDiscountRateMember2020-12-310001126328pfg:AdjustmentFromEffectOfModifiedRetrospectiveApplicationLdtiMember2020-12-310001126328us-gaap:FixedAnnuityMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-01-012022-03-310001126328us-gaap:UniversalLifeMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-01-012022-03-310001126328us-gaap:TermLifeInsuranceMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-01-012022-03-310001126328pfg:IndividualDisabilityMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentSpecialtyBenefitsMember2022-01-012022-03-310001126328us-gaap:FixedAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-03-310001126328pfg:PensionRiskTransferMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-03-310001126328pfg:LongTermCareInsuranceMemberpfg:SegmentCorporateMember2022-01-012022-03-310001126328pfg:SegmentBenefitsAndProtectionMember2022-01-012022-03-310001126328us-gaap:FixedAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-01-012021-12-310001126328pfg:LongTermCareInsuranceMemberpfg:SegmentCorporateMember2021-01-012021-12-310001126328us-gaap:RestrictedStockUnitsRSUMember2022-01-012022-03-310001126328us-gaap:PerformanceSharesMember2022-01-012022-03-310001126328us-gaap:EmployeeStockOptionMember2022-01-012022-03-310001126328pfg:GuaranteesToUnconsolidatedTrustsUnderContingentFundingAgreementsMember2023-03-310001126328pfg:GuaranteesToThirdPartiesPrimarilyRelatedToFormerSubsidiariesAndJointVenturesMember2023-03-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2023-01-012023-03-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2022-01-012022-03-310001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2023-01-012023-03-310001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2022-01-012022-03-310001126328us-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2023-01-012023-03-310001126328us-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2023-01-012023-03-310001126328us-gaap:CashFlowHedgingMemberpfg:BenefitsClaimsAndSettlementExpensesMember2023-01-012023-03-310001126328us-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2022-01-012022-03-310001126328us-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2022-01-012022-03-310001126328us-gaap:CashFlowHedgingMemberpfg:BenefitsClaimsAndSettlementExpensesMember2022-01-012022-03-310001126328us-gaap:OtherInvestmentsMember2023-03-310001126328us-gaap:EquitySecuritiesMember2023-03-310001126328pfg:MortgageLoansMember2023-03-310001126328pfg:FixedMaturitiesTradingMember2023-03-310001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMember2023-03-310001126328pfg:AssetsCashAndCashEquivalentsMember2023-03-310001126328pfg:AccruedInterestIncomeReceivableMember2023-03-310001126328us-gaap:OtherInvestmentsMember2022-12-310001126328us-gaap:EquitySecuritiesMember2022-12-310001126328pfg:MortgageLoansMember2022-12-310001126328pfg:FixedMaturitiesTradingMember2022-12-310001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMember2022-12-310001126328pfg:AssetsCashAndCashEquivalentsMember2022-12-310001126328pfg:AccruedInterestIncomeReceivableMember2022-12-310001126328pfg:ReinsuranceRecoverablesMember2023-01-012023-03-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-03-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2023-03-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-03-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancialAssetPastDueMember2023-03-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancialAssetNotPastDueMember2023-03-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2023-03-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2023-03-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2023-03-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2023-03-310001126328pfg:StandardPoorsBPlusAndBelowRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328pfg:StandardPoorsBBPlusThruBBMinusRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328pfg:StandardPoorsBBBPlusThruBBBMinusRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328pfg:StandardPoorsAMinusAndAboveRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328pfg:PerformingMemberus-gaap:ResidentialMortgageMember2023-03-310001126328pfg:NonperformingMemberus-gaap:ResidentialMortgageMember2023-03-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancialAssetPastDueMember2022-12-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2022-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001126328us-gaap:ResidentialMortgageMember2022-01-012022-03-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2022-01-012022-03-310001126328pfg:ReinsuranceRecoverablesMember2023-03-310001126328pfg:ReinsuranceRecoverablesMember2022-12-310001126328us-gaap:ResidentialMortgageMember2022-03-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2022-03-310001126328pfg:ReinsuranceRecoverablesMember2022-03-310001126328pfg:ReinsuranceRecoverablesMember2021-12-310001126328us-gaap:AssetPledgedAsCollateralWithRightMember2023-03-310001126328us-gaap:AssetPledgedAsCollateralWithRightMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMember2022-03-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2023-03-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2022-03-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2023-03-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2023-03-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2023-03-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2023-03-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2023-03-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2023-03-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2023-03-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2023-03-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2023-03-310001126328pfg:FundsWithheldPayableEmbeddedDerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2023-03-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2022-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328pfg:FundsWithheldPayableEmbeddedDerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-03-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-03-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2022-03-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-03-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-03-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-03-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-03-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2022-03-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2022-03-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2021-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2022-01-012022-03-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2023-01-012023-03-310001126328us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2023-03-310001126328us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2022-12-310001126328pfg:FloatingRateNotesPayableDue2055Memberus-gaap:SubsequentEventMember2023-04-072023-04-070001126328us-gaap:RestrictedStockUnitsRSUMember2023-01-012023-03-310001126328us-gaap:EmployeeStockOptionMember2023-01-012023-03-310001126328us-gaap:RestrictedStockUnitsRSUMember2023-03-310001126328us-gaap:PerformanceSharesMember2023-03-310001126328us-gaap:EmployeeStockOptionMember2023-03-310001126328us-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2023-03-310001126328us-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLapseRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputNonPerformanceRiskMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328us-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLapseRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328us-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputNonPerformanceRiskMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputNonPerformanceRiskMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputNonPerformanceRiskMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:MeasurementInputLapseRateMember2022-12-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:MeasurementInputLapseRateMember2022-12-310001126328pfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-01-012023-03-310001126328pfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalGlobalInvestorsMember2023-01-012023-03-310001126328pfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentSpecialtyBenefitsMember2023-01-012023-03-310001126328pfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-01-012023-03-310001126328pfg:SegmentCorporateMember2023-01-012023-03-310001126328pfg:StandardPoorsBPlusAndBelowRatingMember2022-12-310001126328us-gaap:SingleStockFutureMember2023-03-310001126328us-gaap:EmbeddedDerivativeFinancialInstrumentsMember2023-03-310001126328pfg:InterestRateFutureMember2023-03-310001126328us-gaap:SingleStockFutureMember2022-12-310001126328us-gaap:EmbeddedDerivativeFinancialInstrumentsMember2022-12-310001126328pfg:InterestRateFutureMember2022-12-310001126328us-gaap:OtherContractMember2023-01-012023-03-310001126328us-gaap:InterestRateContractMember2023-01-012023-03-310001126328us-gaap:ForeignExchangeContractMember2023-01-012023-03-310001126328us-gaap:EquityContractMember2023-01-012023-03-310001126328us-gaap:CreditRiskContractMember2023-01-012023-03-310001126328us-gaap:OtherContractMember2022-01-012022-03-310001126328us-gaap:InterestRateContractMember2022-01-012022-03-310001126328us-gaap:ForeignExchangeContractMember2022-01-012022-03-310001126328us-gaap:EquityContractMember2022-01-012022-03-310001126328us-gaap:CreditRiskContractMember2022-01-012022-03-310001126328srt:MaximumMemberus-gaap:PensionPlansDefinedBenefitMember2023-03-310001126328us-gaap:PensionPlansDefinedBenefitMember2023-01-012023-03-310001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2023-01-012023-03-310001126328us-gaap:PensionPlansDefinedBenefitMember2022-01-012022-03-310001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-01-012022-03-310001126328us-gaap:AccountingStandardsUpdate201812Member2023-01-012023-03-310001126328pfg:PensionRiskTransferMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-01-012021-12-310001126328us-gaap:ParticipatingLifeInsurancePolicyMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328pfg:InvestmentOnlyMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:OtherShortdurationInsuranceProductLineMember2023-03-310001126328us-gaap:OtherLongdurationInsuranceProductLineMember2023-03-310001126328us-gaap:ParticipatingLifeInsurancePolicyMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328pfg:InvestmentOnlyMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:OtherShortdurationInsuranceProductLineMember2022-12-310001126328us-gaap:OtherLongdurationInsuranceProductLineMember2022-12-310001126328us-gaap:ParticipatingLifeInsurancePolicyMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2021-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-12-310001126328pfg:InvestmentOnlyMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-12-310001126328us-gaap:ParticipatingLifeInsurancePolicyMemberpfg:AociGainLossReversalAdjustmentLdtiMemberus-gaap:AccountingStandardsUpdate201812Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2020-12-310001126328us-gaap:VariableAnnuityMemberpfg:AociGainLossReversalAdjustmentLdtiMemberus-gaap:AccountingStandardsUpdate201812Memberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328us-gaap:TermLifeInsuranceMembersrt:ScenarioPreviouslyReportedMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2020-12-310001126328us-gaap:ParticipatingLifeInsurancePolicyMembersrt:ScenarioPreviouslyReportedMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2020-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:AociGainLossReversalAdjustmentLdtiMemberus-gaap:AccountingStandardsUpdate201812Memberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:AociGainLossReversalAdjustmentLdtiMemberus-gaap:AccountingStandardsUpdate201812Memberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:IndividualDisabilityMembersrt:ScenarioPreviouslyReportedMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentSpecialtyBenefitsMember2020-12-310001126328us-gaap:VariableAnnuityMembersrt:ScenarioPreviouslyReportedMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328us-gaap:ParticipatingLifeInsurancePolicyMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2020-12-310001126328us-gaap:DeferredFixedAnnuityMembersrt:ScenarioPreviouslyReportedMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMembersrt:ScenarioPreviouslyReportedMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:InvestmentOnlyMembersrt:ScenarioPreviouslyReportedMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:AociGainLossReversalAdjustmentLdtiMemberus-gaap:AccountingStandardsUpdate201812Memberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:AociGainLossReversalAdjustmentLdtiMemberus-gaap:AccountingStandardsUpdate201812Memberpfg:SegmentBenefitsAndProtectionMember2020-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328srt:ScenarioPreviouslyReportedMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328srt:ScenarioPreviouslyReportedMemberpfg:SegmentBenefitsAndProtectionMember2020-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:InvestmentOnlyMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:AociGainLossReversalAdjustmentLdtiMemberus-gaap:AccountingStandardsUpdate201812Member2020-12-310001126328srt:ScenarioPreviouslyReportedMember2020-12-310001126328pfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:SegmentBenefitsAndProtectionMember2020-12-3100011263282020-12-310001126328us-gaap:ParticipatingLifeInsurancePolicyMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-01-012023-03-310001126328pfg:InvestmentOnlyMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-01-012023-03-310001126328pfg:LongDurationAndShortDurationInsuranceMember2023-01-012023-03-310001126328us-gaap:ParticipatingLifeInsurancePolicyMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-01-012022-12-310001126328pfg:InvestmentOnlyMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-12-310001126328pfg:LongDurationAndShortDurationInsuranceMember2022-01-012022-03-310001126328us-gaap:TermLifeInsuranceMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2021-01-012021-12-310001126328us-gaap:ParticipatingLifeInsurancePolicyMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2021-01-012021-12-310001126328pfg:IndividualDisabilityMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentSpecialtyBenefitsMember2021-01-012021-12-310001126328us-gaap:VariableAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-01-012021-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-01-012021-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-01-012021-12-310001126328pfg:InvestmentOnlyMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-01-012021-12-310001126328srt:WeightedAverageMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MinimumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MaximumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MinimumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:WeightedAverageMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:WeightedAverageMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MinimumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MinimumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MaximumMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:MaximumMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2023-03-310001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2023-03-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2023-03-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2023-03-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-03-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2023-03-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2023-03-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2023-03-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-03-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2023-03-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2023-03-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2023-03-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-03-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2023-03-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2023-03-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2023-03-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2023-03-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2023-03-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2023-03-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-03-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2023-03-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2023-03-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2023-03-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-03-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2023-03-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2022-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2022-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2022-12-310001126328us-gaap:OtherDebtSecuritiesMember2022-03-310001126328us-gaap:CorporateDebtSecuritiesMember2022-03-310001126328us-gaap:CommercialMortgageBackedSecuritiesMember2022-03-310001126328us-gaap:OtherDebtSecuritiesMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMember2021-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMember2021-12-310001126328pfg:NotesPayable5.5PercentDue2053Memberus-gaap:SeniorNotesMember2023-03-080001126328pfg:NotesPayable5.375PercentDue2023Memberus-gaap:SeniorNotesMember2023-03-080001126328us-gaap:SeniorNotesMember2023-03-080001126328pfg:MortgagesAndNotesPayableMemberus-gaap:NonrecourseMember2023-03-310001126328pfg:NotesPayable6.05PercentDue2036Member2023-03-310001126328pfg:NotesPayable5.5PercentDue2053Member2023-03-310001126328pfg:NotesPayable5.375PercentDue2023Member2023-03-310001126328pfg:NotesPayable4.625PercentDue2042Member2023-03-310001126328pfg:NotesPayable4.3PercentDue2046Member2023-03-310001126328pfg:NotesPayable4.35PercentDue2043Member2023-03-310001126328pfg:NotesPayable3.7PercentDue2029Member2023-03-310001126328pfg:NotesPayable3.4PercentDue2025Member2023-03-310001126328pfg:NotesPayable3.1PercentDue2026Member2023-03-310001126328pfg:NotesPayable3.125PercentDue2023Member2023-03-310001126328pfg:NotesPayable2.125PercentDue2030Member2023-03-310001126328pfg:FloatingRateNotesPayableDue2055Member2023-03-310001126328pfg:MortgagesAndNotesPayableMemberus-gaap:NonrecourseMember2022-12-310001126328pfg:NotesPayable6.05PercentDue2036Member2022-12-310001126328pfg:NotesPayable4.625PercentDue2042Member2022-12-310001126328pfg:NotesPayable4.3PercentDue2046Member2022-12-310001126328pfg:NotesPayable4.35PercentDue2043Member2022-12-310001126328pfg:NotesPayable3.7PercentDue2029Member2022-12-310001126328pfg:NotesPayable3.4PercentDue2025Member2022-12-310001126328pfg:NotesPayable3.1PercentDue2026Member2022-12-310001126328pfg:NotesPayable3.125PercentDue2023Member2022-12-310001126328pfg:NotesPayable2.125PercentDue2030Member2022-12-310001126328pfg:FloatingRateNotesPayableDue2055Member2022-12-310001126328us-gaap:CommonStockMember2023-01-012023-03-310001126328us-gaap:CommonStockMember2022-01-012022-03-310001126328us-gaap:USTreasuryAndGovernmentMember2023-03-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMember2023-03-310001126328us-gaap:ResidentialMortgageBackedSecuritiesMember2023-03-310001126328us-gaap:OtherDebtSecuritiesMember2023-03-310001126328us-gaap:ForeignGovernmentDebtSecuritiesMember2023-03-310001126328us-gaap:CorporateDebtSecuritiesMember2023-03-310001126328us-gaap:CommercialMortgageBackedSecuritiesMember2023-03-310001126328us-gaap:CollateralizedDebtObligationsMember2023-03-310001126328us-gaap:USTreasuryAndGovernmentMember2022-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001126328us-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:OtherDebtSecuritiesMember2022-12-310001126328us-gaap:ForeignGovernmentDebtSecuritiesMember2022-12-310001126328us-gaap:CorporateDebtSecuritiesMember2022-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:CollateralizedDebtObligationsMember2022-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2023-03-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2023-03-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2023-03-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2023-03-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2023-03-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2022-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-03-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:OtherDebtSecuritiesMember2023-03-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-03-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:CollateralizedDebtObligationsMember2023-03-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2023-03-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:OtherDebtSecuritiesMember2023-03-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:CorporateDebtSecuritiesMember2023-03-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:CommercialMortgageBackedSecuritiesMember2023-03-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:CollateralizedDebtObligationsMember2023-03-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:EquitySecuritiesMember2023-03-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryResidentialMortgageLoansMember2023-03-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryRealEstateMember2023-03-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryMandatoryRetirementSavingsMember2023-03-310001126328pfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:SegmentPrincipalAssetManagementMember2023-03-310001126328pfg:SegmentCorporateMember2023-03-310001126328pfg:SegmentBenefitsAndProtectionMember2023-03-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:OtherDebtSecuritiesMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:CollateralizedDebtObligationsMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:OtherDebtSecuritiesMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:CollateralizedDebtObligationsMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:EquitySecuritiesMember2022-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryResidentialMortgageLoansMember2022-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryRealEstateMember2022-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryMandatoryRetirementSavingsMember2022-12-310001126328pfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:SegmentPrincipalAssetManagementMember2022-12-310001126328pfg:SegmentCorporateMember2022-12-310001126328pfg:SegmentBenefitsAndProtectionMember2022-12-310001126328pfg:GuaranteedPensionMembersrt:AsiaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:GuaranteedPensionMembersrt:AsiaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:GuaranteedPensionMembersrt:AsiaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2021-12-310001126328us-gaap:VariableAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-12-310001126328pfg:GuaranteedPensionMembersrt:AsiaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2020-12-310001126328us-gaap:VariableAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328us-gaap:FixedAnnuityMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-03-310001126328pfg:PensionRiskTransferMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:FixedAnnuityMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-12-310001126328pfg:PensionRiskTransferMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:FixedAnnuityMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2021-12-310001126328us-gaap:FixedAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-12-310001126328pfg:PensionRiskTransferMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-12-310001126328us-gaap:FixedAnnuityMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2020-12-310001126328us-gaap:FixedAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:PensionRiskTransferMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberpfg:MarketRiskBenefitsCumulativeEffectOfChangesInNonperformanceRiskBetweenOriginalContractIssueDateAndTransitionDateMemberpfg:MarketRiskBenefitsMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberpfg:CostOfReinsuranceAssetLiabilityAdjustmentOfUnrealizedLossInAociMemberpfg:CostOfReinsuranceAssetLiabilityMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberpfg:AociGainLossReversalAdjustmentLdtiMemberpfg:ReinsuranceRecoverablesMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberpfg:AociGainLossReversalAdjustmentLdtiMemberpfg:LiabilityForFuturePolicyBenefitsMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberpfg:AociGainLossReversalAdjustmentLdtiMemberpfg:DacAndOtherActuarialBalancesMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberpfg:AociGainLossRemeasurementAdjustmentDiscountRateMemberpfg:ReinsuranceRecoverablesMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberpfg:AociGainLossRemeasurementAdjustmentDiscountRateMemberpfg:LiabilityForFuturePolicyBenefitsMember2020-12-310001126328pfg:August2022AcceleratedShareRepurchaseProgramMemberus-gaap:CommonStockMember2022-08-160001126328pfg:AcceleratedShareRepurchaseProgramMarch2022Memberus-gaap:CommonStockMember2022-03-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:OtherLimitedPartnershipAndFundInterestsMember2023-03-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:OtherLimitedPartnershipAndFundInterestsMember2022-12-310001126328pfg:SegmentBenefitsAndProtectionMember2023-01-012023-03-310001126328us-gaap:OtherLongdurationInsuranceProductLineMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328pfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:OtherLongdurationInsuranceProductLineMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328pfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2021-12-310001126328us-gaap:UniversalLifeMemberpfg:AociGainLossReversalAdjustmentLdtiMemberus-gaap:AccountingStandardsUpdate201812Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2020-12-310001126328us-gaap:UniversalLifeMembersrt:ScenarioPreviouslyReportedMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2020-12-310001126328pfg:AociGainLossReversalAdjustmentLdtiMemberus-gaap:AccountingStandardsUpdate201812Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2020-12-310001126328us-gaap:UniversalLifeMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2020-12-310001126328srt:ScenarioPreviouslyReportedMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2020-12-310001126328pfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2020-12-310001126328us-gaap:CommonStockMember2022-01-012022-01-310001126328us-gaap:CommonStockMember2021-06-012021-06-300001126328us-gaap:RetainedEarningsMember2023-01-012023-03-310001126328us-gaap:RetainedEarningsMember2022-01-012022-03-310001126328pfg:StockBasedCompensationPlansMember2023-01-012023-03-310001126328pfg:StockBasedCompensationPlansMember2022-01-012022-03-310001126328pfg:StockBasedCompensationDirectorsStockPlanStockIncentivePlanAmendedAndRestatedStockIncentivePlanDirectorsStockPlanMember2023-03-310001126328us-gaap:PerformanceSharesMember2023-01-012023-03-310001126328pfg:GroupRetirementContractsProductMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-01-012023-03-310001126328pfg:GroupRetirementContractsProductMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-12-310001126328pfg:PensionMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-01-012023-03-310001126328pfg:PensionMembersrt:LatinAmericaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-01-012022-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2023-03-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2023-03-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2023-03-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2023-03-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2023-03-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2023-03-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2023-03-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2023-03-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2023-03-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2023-03-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2023-03-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2023-03-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2023-03-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2023-03-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2023-03-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberpfg:MarketRiskBenefitsRetainedEarningsAdjustmentForValuationOfContractsAsMrbsMemberpfg:MarketRiskBenefitsMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberpfg:MarketRiskBenefitsReclassificationOfNonperformanceRiskChangesBetweenRetainedEarningsAndAociMemberpfg:MarketRiskBenefitsMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberpfg:MarketRiskBenefitsAdjustmentsToHostContractForDifferencesBetweenPreviousCarryingAmountAndMeasurementOfMrbMemberpfg:MarketRiskBenefitsMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberpfg:InvestmentInEquityMethodSubsidiaryImpactedByLdtiMemberus-gaap:OtherInvestmentsMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberpfg:CostOfReinsuranceAssetLiabilityCumulativeEffectOfAmortizationBasisChangeMemberpfg:CostOfReinsuranceAssetLiabilityMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberpfg:AdjustmentFromEffectOfModifiedRetrospectiveApplicationLdtiMemberpfg:ReinsuranceRecoverablesMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberpfg:AdjustmentFromEffectOfModifiedRetrospectiveApplicationLdtiMemberpfg:LiabilityForFuturePolicyBenefitsMember2020-12-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:VariableAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:VariableAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:VariableAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberus-gaap:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeUpTo0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0401AndGreaterMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0301To0400Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0201To0300Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0201AndGreaterMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0101To0200Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0100Memberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:VariableAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328us-gaap:UniversalLifeMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-01-012023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-01-012023-03-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-01-012023-03-310001126328us-gaap:DeferredFixedAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-12-310001126328pfg:WorkplaceSavingsAndRetirementSolutionsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-12-310001126328us-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMemberpfg:NetInvestmentIncomeLossMember2023-01-012023-03-310001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberpfg:BenefitsClaimsAndSettlementExpensesMember2023-01-012023-03-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2023-01-012023-03-310001126328us-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMemberpfg:NetInvestmentIncomeLossMember2022-01-012022-03-310001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberpfg:BenefitsClaimsAndSettlementExpensesMember2022-01-012022-03-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2022-01-012022-03-310001126328srt:RetailSiteMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328srt:OtherPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328srt:OfficeBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328srt:IndustrialPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328srt:HotelMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328srt:ApartmentBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328pfg:WestSouthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328pfg:WestNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328pfg:SouthAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328pfg:PacificMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328pfg:NewEnglandMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328pfg:MountainMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328pfg:MiddleAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328pfg:InternationalMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328pfg:EastSouthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328pfg:EastNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2023-03-310001126328srt:RetailSiteMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328srt:OtherPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328srt:OfficeBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328srt:IndustrialPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328srt:HotelMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328srt:ApartmentBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:WestSouthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:WestNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:SouthAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:PacificMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:NewEnglandMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:MountainMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:MiddleAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:InternationalMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:EastSouthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:EastNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-01-012023-03-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentEliminationsMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentEliminationsMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalAssetManagementMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentBenefitsAndProtectionMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMember2023-01-012023-03-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentEliminationsMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentEliminationsMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalAssetManagementMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentBenefitsAndProtectionMember2022-01-012022-03-310001126328us-gaap:OperatingSegmentsMember2022-01-012022-03-310001126328us-gaap:VariableAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-01-012023-03-310001126328pfg:GuaranteedPensionMembersrt:AsiaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2022-01-012022-12-310001126328us-gaap:VariableAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-12-310001126328pfg:GuaranteedPensionMembersrt:AsiaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2023-01-012023-03-310001126328pfg:GuaranteedPensionMembersrt:AsiaMemberpfg:SegmentPrincipalAssetManagementMemberpfg:SubsegmentPrincipalInternationalMember2021-01-012021-12-310001126328us-gaap:TermLifeInsuranceMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2023-03-310001126328pfg:IndividualDisabilityMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentSpecialtyBenefitsMember2023-03-310001126328us-gaap:FixedAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2023-03-310001126328pfg:LongTermCareInsuranceMemberpfg:SegmentCorporateMember2023-03-310001126328us-gaap:TermLifeInsuranceMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2022-12-310001126328pfg:IndividualDisabilityMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentSpecialtyBenefitsMember2022-12-310001126328us-gaap:FixedAnnuityMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:LongTermCareInsuranceMemberpfg:SegmentCorporateMember2022-12-310001126328us-gaap:TermLifeInsuranceMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember2021-12-310001126328pfg:IndividualDisabilityMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentSpecialtyBenefitsMember2021-12-310001126328pfg:LongTermCareInsuranceMemberpfg:SegmentCorporateMember2021-12-310001126328us-gaap:TermLifeInsuranceMemberpfg:SegmentBenefitsAndProtectionMemberpfg:SubsegmentLifeInsuranceMember