http://fasb.org/us-gaap/2021-01-31#ValuationTechniqueDiscountedCashFlowMember0001126328--12-312022Q2falsehttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20220630#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization420000032400000139700000697000005600000870000085000002430000035900000106600000105600000http://fasb.org/us-gaap/2021-01-31#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2021-01-31#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2021-01-31#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2021-01-31#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2021-01-31#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2021-01-31#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2021-01-31#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2021-01-31#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2021-01-31#ValuationTechniqueDiscountedCashFlowMember0001126328us-gaap:TreasuryStockMember2021-04-012021-06-300001126328us-gaap:TreasuryStockMember2021-01-012021-06-300001126328us-gaap:TreasuryStockMember2022-06-300001126328us-gaap:RetainedEarningsMember2022-06-300001126328us-gaap:NoncontrollingInterestMember2022-06-300001126328us-gaap:AdditionalPaidInCapitalMember2022-06-300001126328us-gaap:TreasuryStockMember2022-03-310001126328us-gaap:RetainedEarningsMember2022-03-310001126328us-gaap:NoncontrollingInterestMember2022-03-310001126328us-gaap:AdditionalPaidInCapitalMember2022-03-310001126328us-gaap:TreasuryStockMember2021-12-310001126328us-gaap:RetainedEarningsMember2021-12-310001126328us-gaap:NoncontrollingInterestMember2021-12-310001126328us-gaap:AdditionalPaidInCapitalMember2021-12-310001126328us-gaap:TreasuryStockMember2021-06-300001126328us-gaap:RetainedEarningsMember2021-06-300001126328us-gaap:NoncontrollingInterestMember2021-06-300001126328us-gaap:AdditionalPaidInCapitalMember2021-06-300001126328us-gaap:TreasuryStockMember2021-03-310001126328us-gaap:RetainedEarningsMember2021-03-310001126328us-gaap:NoncontrollingInterestMember2021-03-310001126328us-gaap:AdditionalPaidInCapitalMember2021-03-310001126328us-gaap:TreasuryStockMember2020-12-310001126328us-gaap:RetainedEarningsMember2020-12-310001126328us-gaap:NoncontrollingInterestMember2020-12-310001126328us-gaap:AdditionalPaidInCapitalMember2020-12-310001126328srt:MinimumMembersrt:ProFormaMemberus-gaap:AccountingStandardsUpdate201812Member2022-12-310001126328srt:MaximumMembersrt:ProFormaMemberus-gaap:AccountingStandardsUpdate201812Member2022-12-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2022-06-300001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-06-300001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-06-300001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-06-300001126328us-gaap:AccumulatedTranslationAdjustmentMember2022-03-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-03-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-03-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-03-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-03-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2021-12-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-12-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-12-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-12-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2021-06-300001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-06-300001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-06-300001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-06-300001126328us-gaap:AccumulatedTranslationAdjustmentMember2021-03-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-03-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-03-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-03-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-03-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2020-12-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-12-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-12-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-12-310001126328us-gaap:CommonStockMember2022-06-300001126328us-gaap:CommonStockMember2022-03-310001126328us-gaap:CommonStockMember2021-12-310001126328us-gaap:CommonStockMember2021-06-300001126328us-gaap:CommonStockMember2021-03-310001126328us-gaap:CommonStockMember2020-12-310001126328pfg:StockBasedCompensationPlans2021StockIncentivePlanMember2022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:DepositAccountMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentSpecialtyBenefitsInsuranceMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalInternationalMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalGlobalInvestorsMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalInternationalMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalGlobalInvestorsMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentCorporateMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMembersrt:LatinAmericaMemberpfg:SegmentPrincipalInternationalMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMembersrt:AsiaMemberpfg:SegmentPrincipalInternationalMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentUSInsuranceSolutionsEliminationsMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentGeographicalAreaEliminationsMemberpfg:SegmentPrincipalInternationalMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:ProductsAndServicesEliminationsMemberpfg:SegmentCorporateMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CorporateAndRegionalMemberpfg:SegmentPrincipalInternationalMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentCorporateMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:DepositAccountMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentSpecialtyBenefitsInsuranceMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalInternationalMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalGlobalInvestorsMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalInternationalMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalGlobalInvestorsMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentCorporateMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMembersrt:LatinAmericaMemberpfg:SegmentPrincipalInternationalMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMembersrt:AsiaMemberpfg:SegmentPrincipalInternationalMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentUSInsuranceSolutionsEliminationsMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentGeographicalAreaEliminationsMemberpfg:SegmentPrincipalInternationalMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:ProductsAndServicesEliminationsMemberpfg:SegmentCorporateMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CorporateAndRegionalMemberpfg:SegmentPrincipalInternationalMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentCorporateMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:DepositAccountMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentSpecialtyBenefitsInsuranceMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalInternationalMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalGlobalInvestorsMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalInternationalMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalGlobalInvestorsMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentCorporateMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMembersrt:LatinAmericaMemberpfg:SegmentPrincipalInternationalMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMembersrt:AsiaMemberpfg:SegmentPrincipalInternationalMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentUSInsuranceSolutionsEliminationsMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentGeographicalAreaEliminationsMemberpfg:SegmentPrincipalInternationalMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:ProductsAndServicesEliminationsMemberpfg:SegmentCorporateMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CorporateAndRegionalMemberpfg:SegmentPrincipalInternationalMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentCorporateMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:DepositAccountMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentSpecialtyBenefitsInsuranceMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalInternationalMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalGlobalInvestorsMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalInternationalMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalGlobalInvestorsMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentCorporateMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMembersrt:LatinAmericaMemberpfg:SegmentPrincipalInternationalMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMembersrt:AsiaMemberpfg:SegmentPrincipalInternationalMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentUSInsuranceSolutionsEliminationsMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentGeographicalAreaEliminationsMemberpfg:SegmentPrincipalInternationalMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:ProductsAndServicesEliminationsMemberpfg:SegmentCorporateMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CorporateAndRegionalMemberpfg:SegmentPrincipalInternationalMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentCorporateMember2021-01-012021-06-300001126328pfg:OperatingExpensesMemberus-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2022-04-012022-06-300001126328pfg:NetRealizedCapitalGainsLossesMemberus-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2022-04-012022-06-300001126328pfg:OperatingExpensesMemberus-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2022-01-012022-06-300001126328pfg:NetRealizedCapitalGainsLossesMemberus-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2022-01-012022-06-300001126328pfg:OperatingExpensesMemberus-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-04-012021-06-300001126328pfg:NetRealizedCapitalGainsLossesMemberus-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2021-04-012021-06-300001126328pfg:OperatingExpensesMemberus-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-01-012021-06-300001126328pfg:NetRealizedCapitalGainsLossesMemberus-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2021-01-012021-06-300001126328us-gaap:FinanceLeasesPortfolioSegmentMember2022-01-012022-06-300001126328pfg:ReinsuranceRecoverablesMember2022-01-012022-06-300001126328us-gaap:FinanceLeasesPortfolioSegmentMember2021-04-012021-06-300001126328pfg:ReinsuranceRecoverablesMember2021-04-012021-06-300001126328us-gaap:FinanceLeasesPortfolioSegmentMember2021-01-012021-06-300001126328pfg:ReinsuranceRecoverablesMember2021-01-012021-06-300001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-04-012021-06-300001126328us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2022-04-012022-06-300001126328us-gaap:NetInvestmentHedgingMember2022-04-012022-06-300001126328us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2022-01-012022-06-300001126328us-gaap:NetInvestmentHedgingMember2022-01-012022-06-300001126328us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2021-04-012021-06-300001126328us-gaap:NetInvestmentHedgingMember2021-04-012021-06-300001126328us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2021-01-012021-06-300001126328us-gaap:NetInvestmentHedgingMember2021-01-012021-06-300001126328pfg:InvestmentContractMemberus-gaap:InterestRateContractMember2022-04-012022-06-300001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:InterestRateContractMember2022-04-012022-06-300001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:ForeignExchangeContractMember2022-04-012022-06-300001126328pfg:InvestmentContractMemberus-gaap:InterestRateContractMember2022-01-012022-06-300001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:InterestRateContractMember2022-01-012022-06-300001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:ForeignExchangeContractMember2022-01-012022-06-300001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:ForeignExchangeContractMember2021-04-012021-06-300001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:ForeignExchangeContractMember2021-01-012021-06-300001126328us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2022-04-012022-06-300001126328us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2022-01-012022-06-300001126328us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-04-012021-06-300001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-04-012021-06-300001126328us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-01-012021-06-300001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2022-04-012022-06-300001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2022-01-012022-06-300001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-01-012021-06-300001126328us-gaap:AccumulatedTranslationAdjustmentMember2022-04-012022-06-300001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-04-012022-06-300001126328us-gaap:AccumulatedTranslationAdjustmentMember2022-01-012022-06-300001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-01-012022-06-300001126328us-gaap:AccumulatedTranslationAdjustmentMember2021-04-012021-06-300001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-04-012021-06-300001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-04-012021-06-300001126328us-gaap:AccumulatedTranslationAdjustmentMember2021-01-012021-06-300001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-01-012021-06-300001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-01-012021-06-300001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-01-012021-06-300001126328us-gaap:TreasuryStockMember2022-04-012022-06-300001126328us-gaap:TreasuryStockMember2022-01-012022-06-300001126328pfg:LawsuitAllegingBreachOfFiduciaryDutyInConnectionWithPrincipalFixedIncomeOptionMember2022-06-300001126328us-gaap:RestrictedStockUnitsRSUMember2022-04-012022-06-300001126328us-gaap:PerformanceSharesMember2022-04-012022-06-300001126328us-gaap:EmployeeStockOptionMember2022-04-012022-06-300001126328us-gaap:RestrictedStockUnitsRSUMember2021-04-012021-06-300001126328us-gaap:PerformanceSharesMember2021-04-012021-06-300001126328us-gaap:EmployeeStockOptionMember2021-04-012021-06-300001126328us-gaap:RestrictedStockUnitsRSUMember2021-01-012021-06-300001126328us-gaap:PerformanceSharesMember2021-01-012021-06-300001126328us-gaap:EmployeeStockOptionMember2021-01-012021-06-300001126328pfg:GuaranteesToUnconsolidatedTrustsUnderContingentFundingAgreementsMember2022-06-300001126328pfg:GuaranteesToThirdPartiesPrimarilyRelatedToFormerSubsidiariesAndJointVenturesMember2022-06-300001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2022-04-012022-06-300001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2022-01-012022-06-300001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2021-04-012021-06-300001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2021-01-012021-06-300001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2022-04-012022-06-300001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2022-01-012022-06-300001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2021-04-012021-06-300001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2021-01-012021-06-300001126328us-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2022-04-012022-06-300001126328us-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2022-04-012022-06-300001126328us-gaap:CashFlowHedgingMemberpfg:BenefitsClaimsAndSettlementExpensesMember2022-04-012022-06-300001126328us-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2022-01-012022-06-300001126328us-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2022-01-012022-06-300001126328us-gaap:CashFlowHedgingMemberpfg:BenefitsClaimsAndSettlementExpensesMember2022-01-012022-06-300001126328us-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2021-04-012021-06-300001126328us-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2021-04-012021-06-300001126328us-gaap:CashFlowHedgingMemberpfg:BenefitsClaimsAndSettlementExpensesMember2021-04-012021-06-300001126328us-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2021-01-012021-06-300001126328us-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2021-01-012021-06-300001126328us-gaap:CashFlowHedgingMemberpfg:BenefitsClaimsAndSettlementExpensesMember2021-01-012021-06-300001126328us-gaap:OtherInvestmentsMember2022-06-300001126328us-gaap:EquitySecuritiesMember2022-06-300001126328pfg:MortgageLoansMember2022-06-300001126328pfg:FixedMaturitiesTradingMember2022-06-300001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMember2022-06-300001126328pfg:AssetsCashAndCashEquivalentsMember2022-06-300001126328pfg:AccruedInterestIncomeReceivableMember2022-06-300001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-06-300001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-06-300001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-06-300001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancialAssetPastDueMember2022-06-300001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancialAssetNotPastDueMember2022-06-300001126328us-gaap:FinanceLeasesPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-06-300001126328us-gaap:FinanceLeasesPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-06-300001126328us-gaap:FinanceLeasesPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2022-06-300001126328us-gaap:FinanceLeasesPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2022-06-300001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-06-300001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-06-300001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-06-300001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2022-06-300001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2022-06-300001126328pfg:StandardPoorsBPlusAndBelowRatingMemberus-gaap:FinanceLeasesPortfolioSegmentMember2022-06-300001126328pfg:StandardPoorsBPlusAndBelowRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328pfg:StandardPoorsBBPlusThruBBMinusRatingMemberus-gaap:FinanceLeasesPortfolioSegmentMember2022-06-300001126328pfg:StandardPoorsBBPlusThruBBMinusRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328pfg:StandardPoorsBBBPlusThruBBBMinusRatingMemberus-gaap:FinanceLeasesPortfolioSegmentMember2022-06-300001126328pfg:StandardPoorsBBBPlusThruBBBMinusRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328pfg:StandardPoorsAMinusAndAboveRatingMemberus-gaap:FinanceLeasesPortfolioSegmentMember2022-06-300001126328pfg:StandardPoorsAMinusAndAboveRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328pfg:PerformingMemberus-gaap:ResidentialMortgageMember2022-06-300001126328pfg:NonperformingMemberus-gaap:ResidentialMortgageMember2022-06-300001126328us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-06-300001126328us-gaap:FinancingReceivables60To89DaysPastDueMember2022-06-300001126328us-gaap:FinancingReceivables30To59DaysPastDueMember2022-06-300001126328us-gaap:FinancialAssetPastDueMember2022-06-300001126328us-gaap:FinancialAssetNotPastDueMember2022-06-300001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancialAssetPastDueMember2021-12-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001126328us-gaap:FinanceLeasesPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001126328us-gaap:FinanceLeasesPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001126328us-gaap:FinanceLeasesPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2021-12-310001126328us-gaap:FinanceLeasesPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2021-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001126328pfg:StandardPoorsBPlusAndBelowRatingMemberus-gaap:FinanceLeasesPortfolioSegmentMember2021-12-310001126328pfg:StandardPoorsBPlusAndBelowRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:StandardPoorsBBPlusThruBBMinusRatingMemberus-gaap:FinanceLeasesPortfolioSegmentMember2021-12-310001126328pfg:StandardPoorsBBPlusThruBBMinusRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001126328us-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001126328us-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001126328us-gaap:FinancialAssetPastDueMember2021-12-310001126328us-gaap:FinancialAssetNotPastDueMember2021-12-310001126328us-gaap:ResidentialMortgageMember2022-06-300001126328us-gaap:FinanceLeasesPortfolioSegmentMember2022-06-300001126328pfg:ReinsuranceRecoverablesMember2022-06-300001126328us-gaap:ResidentialMortgageMember2022-03-310001126328us-gaap:FinanceLeasesPortfolioSegmentMember2022-03-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2022-03-310001126328pfg:ReinsuranceRecoverablesMember2022-03-310001126328pfg:ReinsuranceRecoverablesMember2021-12-310001126328us-gaap:ResidentialMortgageMember2021-06-300001126328us-gaap:FinanceLeasesPortfolioSegmentMember2021-06-300001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2021-06-300001126328pfg:ReinsuranceRecoverablesMember2021-06-300001126328us-gaap:ResidentialMortgageMember2021-03-310001126328us-gaap:FinanceLeasesPortfolioSegmentMember2021-03-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2021-03-310001126328pfg:ReinsuranceRecoverablesMember2021-03-310001126328us-gaap:ResidentialMortgageMember2020-12-310001126328us-gaap:FinanceLeasesPortfolioSegmentMember2020-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2020-12-310001126328pfg:ReinsuranceRecoverablesMember2020-12-310001126328us-gaap:ResidentialMortgageMember2022-04-012022-06-300001126328us-gaap:FinanceLeasesPortfolioSegmentMember2022-04-012022-06-300001126328pfg:ReinsuranceRecoverablesMember2022-04-012022-06-300001126328us-gaap:ResidentialMortgageMember2021-04-012021-06-300001126328us-gaap:ResidentialMortgageMember2021-01-012021-06-300001126328us-gaap:EquityMethodInvestmentsMember2021-04-012021-06-300001126328us-gaap:EquityMethodInvestmentsMember2021-01-012021-06-300001126328us-gaap:FairValueMeasurementsRecurringMember2022-03-310001126328us-gaap:FairValueMeasurementsRecurringMember2021-06-300001126328us-gaap:FairValueMeasurementsRecurringMember2021-03-310001126328us-gaap:FairValueMeasurementsRecurringMember2020-12-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2022-06-300001126328pfg:FundsWithheldPayableEmbeddedDerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2022-06-300001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2022-03-310001126328pfg:FundsWithheldPayableEmbeddedDerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2022-03-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328pfg:FundsWithheldPayableEmbeddedDerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2021-06-300001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-06-300001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-06-300001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-06-300001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2022-06-300001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-06-300001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-06-300001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-06-300001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2022-06-300001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2022-06-300001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-03-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-03-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-03-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2022-03-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-03-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-03-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-03-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2022-03-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2022-03-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-06-300001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-06-300001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-06-300001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-06-300001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-06-300001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-06-300001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2021-06-300001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-03-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-03-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-03-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-03-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-03-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2021-03-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2020-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2020-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2020-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2020-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2020-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-04-012022-06-300001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2022-01-012022-06-300001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-04-012021-06-300001126328us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2022-06-300001126328us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310001126328us-gaap:RestrictedStockUnitsRSUMember2022-01-012022-06-300001126328us-gaap:EmployeeStockOptionMember2022-01-012022-06-300001126328us-gaap:RestrictedStockUnitsRSUMember2022-06-300001126328us-gaap:PerformanceSharesMember2022-06-300001126328us-gaap:EmployeeStockOptionMember2022-06-300001126328us-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2022-06-300001126328us-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLapseRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputNonPerformanceRiskMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLapseRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputNonPerformanceRiskMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLapseRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputNonPerformanceRiskMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLapseRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputNonPerformanceRiskMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLapseRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputNonPerformanceRiskMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLapseRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputNonPerformanceRiskMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328pfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2022-01-012022-06-300001126328pfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2022-01-012022-06-300001126328pfg:SegmentUSInsuranceSolutionsMember2022-01-012022-06-300001126328pfg:SegmentPrincipalInternationalMember2022-01-012022-06-300001126328pfg:SegmentCorporateMember2022-01-012022-06-300001126328us-gaap:SingleStockFutureMember2022-06-300001126328us-gaap:EmbeddedDerivativeFinancialInstrumentsMember2022-06-300001126328pfg:InterestRateFutureMember2022-06-300001126328us-gaap:SingleStockFutureMember2021-12-310001126328us-gaap:EmbeddedDerivativeFinancialInstrumentsMember2021-12-310001126328pfg:InterestRateFutureMember2021-12-310001126328us-gaap:OtherContractMember2022-04-012022-06-300001126328us-gaap:InterestRateContractMember2022-04-012022-06-300001126328us-gaap:ForeignExchangeContractMember2022-04-012022-06-300001126328us-gaap:EquityContractMember2022-04-012022-06-300001126328us-gaap:CreditRiskContractMember2022-04-012022-06-300001126328us-gaap:OtherContractMember2022-01-012022-06-300001126328us-gaap:InterestRateContractMember2022-01-012022-06-300001126328us-gaap:ForeignExchangeContractMember2022-01-012022-06-300001126328us-gaap:EquityContractMember2022-01-012022-06-300001126328us-gaap:CreditRiskContractMember2022-01-012022-06-300001126328us-gaap:OtherContractMember2021-04-012021-06-300001126328us-gaap:InterestRateContractMember2021-04-012021-06-300001126328us-gaap:ForeignExchangeContractMember2021-04-012021-06-300001126328us-gaap:EquityContractMember2021-04-012021-06-300001126328us-gaap:CreditRiskContractMember2021-04-012021-06-300001126328us-gaap:OtherContractMember2021-01-012021-06-300001126328us-gaap:InterestRateContractMember2021-01-012021-06-300001126328us-gaap:ForeignExchangeContractMember2021-01-012021-06-300001126328us-gaap:EquityContractMember2021-01-012021-06-300001126328us-gaap:CreditRiskContractMember2021-01-012021-06-300001126328srt:MaximumMemberus-gaap:PensionPlansDefinedBenefitMember2022-06-300001126328us-gaap:PensionPlansDefinedBenefitMember2022-04-012022-06-300001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-04-012022-06-300001126328us-gaap:PensionPlansDefinedBenefitMember2022-01-012022-06-300001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-01-012022-06-300001126328us-gaap:PensionPlansDefinedBenefitMember2021-04-012021-06-300001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-04-012021-06-300001126328us-gaap:PensionPlansDefinedBenefitMember2021-01-012021-06-300001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-01-012021-06-300001126328srt:WeightedAverageMemberus-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:WeightedAverageMemberus-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:WeightedAverageMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MinimumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MinimumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MinimumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MaximumMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-06-300001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:MarketApproachValuationTechniqueMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDefaultRateMemberus-gaap:MarketApproachValuationTechniqueMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:MarketApproachValuationTechniqueMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDefaultRateMemberus-gaap:MarketApproachValuationTechniqueMember2021-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-06-300001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2022-06-300001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2022-06-300001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-06-300001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2022-06-300001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2022-06-300001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-06-300001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-06-300001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2022-06-300001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2022-06-300001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2022-06-300001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-06-300001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2022-06-300001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2022-06-300001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2022-06-300001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2022-06-300001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2022-06-300001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-06-300001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-06-300001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2022-06-300001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2022-06-300001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2022-06-300001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-06-300001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2022-06-300001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2021-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2021-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2021-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2021-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2021-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2021-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2021-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2021-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2021-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2021-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2021-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2021-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2021-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2021-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2021-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2021-12-310001126328us-gaap:OtherDebtSecuritiesMember2022-03-310001126328us-gaap:CorporateDebtSecuritiesMember2022-03-310001126328us-gaap:CommercialMortgageBackedSecuritiesMember2022-03-3100011263282022-03-310001126328us-gaap:CorporateDebtSecuritiesMember2021-06-300001126328us-gaap:CommercialMortgageBackedSecuritiesMember2021-06-300001126328us-gaap:CorporateDebtSecuritiesMember2021-03-310001126328us-gaap:CommercialMortgageBackedSecuritiesMember2021-03-310001126328us-gaap:CollateralizedDebtObligationsMember2021-03-3100011263282021-03-310001126328us-gaap:CorporateDebtSecuritiesMember2020-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMember2020-12-310001126328us-gaap:CollateralizedDebtObligationsMember2020-12-310001126328us-gaap:OtherDebtSecuritiesMember2022-04-012022-06-300001126328us-gaap:OtherDebtSecuritiesMember2022-01-012022-06-300001126328us-gaap:CommercialMortgageBackedSecuritiesMember2021-04-012021-06-300001126328us-gaap:CollateralizedDebtObligationsMember2021-04-012021-06-300001126328us-gaap:CommercialMortgageBackedSecuritiesMember2022-04-012022-06-300001126328us-gaap:CommercialMortgageBackedSecuritiesMember2022-01-012022-06-300001126328us-gaap:CollateralizedDebtObligationsMember2021-01-012021-06-300001126328us-gaap:CommercialMortgageBackedSecuritiesMember2021-01-012021-06-300001126328us-gaap:CorporateDebtSecuritiesMember2021-04-012021-06-300001126328us-gaap:CorporateDebtSecuritiesMember2021-01-012021-06-300001126328pfg:FiveLargestCededReinsurersMemberpfg:NetCededReinsuranceRecoverablesMemberus-gaap:ReinsurerConcentrationRiskMember2022-01-012022-06-300001126328pfg:FiveLargestCededReinsurersMemberpfg:NetCededReinsuranceRecoverablesMemberus-gaap:ReinsurerConcentrationRiskMember2021-01-012021-12-310001126328us-gaap:CommonStockMember2022-04-012022-06-300001126328us-gaap:CommonStockMember2022-01-012022-06-300001126328us-gaap:CommonStockMember2021-04-012021-06-300001126328us-gaap:CommonStockMember2021-01-012021-06-3000011263282020-12-310001126328us-gaap:USTreasuryAndGovernmentMember2022-06-300001126328us-gaap:USStatesAndPoliticalSubdivisionsMember2022-06-300001126328us-gaap:ResidentialMortgageBackedSecuritiesMember2022-06-300001126328us-gaap:OtherDebtSecuritiesMember2022-06-300001126328us-gaap:ForeignGovernmentDebtSecuritiesMember2022-06-300001126328us-gaap:CorporateDebtSecuritiesMember2022-06-300001126328us-gaap:CommercialMortgageBackedSecuritiesMember2022-06-300001126328us-gaap:CollateralizedDebtObligationsMember2022-06-300001126328us-gaap:USTreasuryAndGovernmentMember2021-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMember2021-12-310001126328us-gaap:ResidentialMortgageBackedSecuritiesMember2021-12-310001126328us-gaap:OtherDebtSecuritiesMember2021-12-310001126328us-gaap:ForeignGovernmentDebtSecuritiesMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMember2021-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMember2021-12-310001126328us-gaap:CollateralizedDebtObligationsMember2021-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-06-300001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-06-300001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2022-06-300001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-06-300001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2022-06-300001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-06-300001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:OtherDebtSecuritiesMember2022-06-300001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:CorporateDebtSecuritiesMember2022-06-300001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-06-300001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:CollateralizedDebtObligationsMember2022-06-300001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-06-300001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:OtherDebtSecuritiesMember2022-06-300001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-06-300001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:CollateralizedDebtObligationsMember2022-06-300001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:EquitySecuritiesMember2022-06-300001126328pfg:VariableInterestEntityPrimaryBeneficiarySponsoredInvestmentFundsMember2022-06-300001126328pfg:VariableInterestEntityPrimaryBeneficiaryResidentialMortgageLoansMember2022-06-300001126328pfg:VariableInterestEntityPrimaryBeneficiaryRealEstateMember2022-06-300001126328pfg:VariableInterestEntityPrimaryBeneficiaryMandatoryRetirementSavingsMember2022-06-300001126328pfg:SegmentUSInsuranceSolutionsMember2022-06-300001126328pfg:SegmentRetirementAndIncomeSolutionsMember2022-06-300001126328pfg:SegmentPrincipalInternationalMember2022-06-300001126328pfg:SegmentPrincipalGlobalInvestorsMember2022-06-300001126328pfg:SegmentCorporateMember2022-06-300001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:OtherDebtSecuritiesMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:CorporateDebtSecuritiesMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:CommercialMortgageBackedSecuritiesMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:AvailableforsaleSecuritiesMemberus-gaap:CollateralizedDebtObligationsMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:OtherDebtSecuritiesMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:CommercialMortgageBackedSecuritiesMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:CollateralizedDebtObligationsMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:EquitySecuritiesMember2021-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiarySponsoredInvestmentFundsMember2021-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryResidentialMortgageLoansMember2021-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryRealEstateMember2021-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryMandatoryRetirementSavingsMember2021-12-310001126328pfg:SegmentUSInsuranceSolutionsMember2021-12-310001126328pfg:SegmentRetirementAndIncomeSolutionsMember2021-12-310001126328pfg:SegmentPrincipalInternationalMember2021-12-310001126328pfg:SegmentPrincipalGlobalInvestorsMember2021-12-310001126328pfg:SegmentCorporateMember2021-12-310001126328pfg:AcceleratedShareRepurchaseProgramMarch2022Memberus-gaap:CommonStockMember2022-03-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:OtherLimitedPartnershipAndFundInterestsMember2022-06-300001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:OtherLimitedPartnershipAndFundInterestsMember2021-12-310001126328us-gaap:CommonStockMember2022-01-012022-01-310001126328us-gaap:CommonStockMember2021-06-012021-06-300001126328us-gaap:CommonStockMember2020-02-012020-02-290001126328us-gaap:RetainedEarningsMember2022-04-012022-06-300001126328us-gaap:RetainedEarningsMember2022-01-012022-06-300001126328us-gaap:RetainedEarningsMember2021-01-012021-06-300001126328pfg:StockBasedCompensationPlansMember2022-01-012022-06-300001126328pfg:StockBasedCompensationPlansMember2021-01-012021-06-300001126328pfg:StockBasedCompensationDirectorsStockPlanStockIncentivePlanAmendedAndRestatedStockIncentivePlanDirectorsStockPlanMember2022-06-300001126328us-gaap:PerformanceSharesMember2022-01-012022-06-300001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2022-06-300001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2022-06-300001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowMortgageLoansMember2022-06-300001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputCreditSpreadMemberpfg:DiscountedCashFlowMortgageLoansMember2022-06-300001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2022-06-300001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-06-300001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-06-300001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2022-06-300001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2022-06-300001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2022-06-300001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-06-300001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-06-300001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2022-06-300001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2022-06-300001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2022-06-300001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-06-300001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-06-300001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowMortgageLoansMember2022-06-300001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputCreditSpreadMemberpfg:DiscountedCashFlowMortgageLoansMember2022-06-300001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2021-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2021-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowMortgageLoansMember2021-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputCreditSpreadMemberpfg:DiscountedCashFlowMortgageLoansMember2021-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2021-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2021-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2021-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2021-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2021-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2021-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2021-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2021-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2021-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2021-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2021-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2021-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2021-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowMortgageLoansMember2021-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputCreditSpreadMemberpfg:DiscountedCashFlowMortgageLoansMember2021-12-310001126328us-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMemberpfg:NetInvestmentIncomeLossMember2022-04-012022-06-300001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberpfg:BenefitsClaimsAndSettlementExpensesMember2022-04-012022-06-300001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2022-04-012022-06-300001126328us-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMemberpfg:NetInvestmentIncomeLossMember2022-01-012022-06-300001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2022-01-012022-06-300001126328us-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMemberpfg:NetInvestmentIncomeLossMember2021-04-012021-06-300001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2021-04-012021-06-300001126328us-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMemberpfg:NetInvestmentIncomeLossMember2021-01-012021-06-300001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2021-01-012021-06-300001126328srt:RetailSiteMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328srt:OtherPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328srt:OfficeBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328srt:IndustrialPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328srt:HotelMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328srt:ApartmentBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328pfg:WestSouthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328pfg:WestNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328pfg:SouthAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328pfg:PacificMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328pfg:NewEnglandMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328pfg:MountainMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328pfg:MiddleAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328pfg:InternationalMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328pfg:EastSouthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328pfg:EastNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2022-06-300001126328srt:RetailSiteMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328srt:OtherPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328srt:OfficeBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328srt:IndustrialPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328srt:HotelMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328srt:ApartmentBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:WestSouthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:WestNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:SouthAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:PacificMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:NewEnglandMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:MountainMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:MiddleAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:InternationalMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:EastSouthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:EastNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328srt:WeightedAverageMemberpfg:InvestmentsOtherMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:RevenueMultiplesMemberus-gaap:MarketApproachValuationTechniqueMember2021-12-310001126328srt:MinimumMemberpfg:InvestmentsOtherMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:RevenueMultiplesMemberus-gaap:MarketApproachValuationTechniqueMember2021-12-310001126328srt:MaximumMemberpfg:InvestmentsOtherMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:RevenueMultiplesMemberus-gaap:MarketApproachValuationTechniqueMember2021-12-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-04-012021-06-300001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentEliminationsMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentEliminationsMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentEliminationsMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentEliminationsMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMember2021-01-012021-06-300001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2022-04-012022-06-300001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2022-01-012022-06-300001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2021-04-012021-06-300001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2021-01-012021-06-300001126328pfg:FiveLargestCededReinsurersMemberpfg:NetCededReinsuranceRecoverablesMemberus-gaap:ReinsurerConcentrationRiskMember2022-06-300001126328pfg:FiveLargestCededReinsurersMemberpfg:NetCededReinsuranceRecoverablesMemberus-gaap:ReinsurerConcentrationRiskMember2021-12-310001126328us-gaap:NoncontrollingInterestMember2021-04-012021-06-3000011263282021-06-300001126328us-gaap:FairValueInputsLevel3Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2022-06-300001126328us-gaap:FairValueInputsLevel3Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310001126328pfg:SegmentRetirementAndIncomeSolutionsMember2022-04-012022-06-300001126328pfg:SegmentPrincipalGlobalInvestorsMember2022-04-012022-06-300001126328pfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-06-300001126328pfg:SegmentPrincipalGlobalInvestorsMember2022-01-012022-06-300001126328pfg:SegmentRetirementAndIncomeSolutionsMember2021-04-012021-06-300001126328pfg:SegmentPrincipalGlobalInvestorsMember2021-04-012021-06-300001126328pfg:SegmentRetirementAndIncomeSolutionsMember2021-01-012021-06-300001126328pfg:SegmentPrincipalGlobalInvestorsMember2021-01-012021-06-300001126328us-gaap:InterestRateSwapMember2022-01-012022-06-300001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMember2022-06-300001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMember2021-12-310001126328pfg:NetOtherAssetsAndLiabilitiesMember2022-06-300001126328pfg:StandardPoorsBBBPlusThruBBBMinusRatingMemberus-gaap:FinanceLeasesPortfolioSegmentMember2021-12-310001126328pfg:StandardPoorsBBBPlusThruBBBMinusRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:StandardPoorsAMinusAndAboveRatingMemberus-gaap:FinanceLeasesPortfolioSegmentMember2021-12-310001126328pfg:StandardPoorsAMinusAndAboveRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:PerformingMemberus-gaap:ResidentialMortgageMember2021-12-310001126328pfg:NonperformingMemberus-gaap:ResidentialMortgageMember2021-12-310001126328us-gaap:ResidentialMortgageMember2021-12-310001126328us-gaap:FinanceLeasesPortfolioSegmentMember2021-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2022-04-012022-06-300001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2021-04-012021-06-300001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentSpecialtyBenefitsInsuranceMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalInternationalMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalGlobalInvestorsMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentCorporateMember2022-04-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentSpecialtyBenefitsInsuranceMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalInternationalMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalGlobalInvestorsMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentCorporateMember2022-01-012022-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentSpecialtyBenefitsInsuranceMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalInternationalMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalGlobalInvestorsMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentCorporateMember2021-04-012021-06-300001126328us-gaap:MaterialReconcilingItemsMember2021-04-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentSpecialtyBenefitsInsuranceMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalInternationalMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalGlobalInvestorsMember2021-01-012021-06-300001126328us-gaap:OperatingSegmentsMemberpfg:SegmentCorporateMember2021-01-012021-06-300001126328us-gaap:MaterialReconcilingItemsMember2021-01-012021-06-300001126328us-gaap:FairValueMeasurementsRecurringMember2021-04-012021-06-300001126328us-gaap:FairValueMeasurementsRecurringMember2021-01-012021-06-300001126328us-gaap:FairValueMeasurementsRecurringMember2022-04-012022-06-300001126328us-gaap:FairValueMeasurementsRecurringMember2022-01-012022-06-300001126328pfg:FundsWithheldPayableEmbeddedDerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2022-04-012022-06-300001126328pfg:FundsWithheldPayableEmbeddedDerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2022-01-012022-06-300001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2022-04-012022-06-300001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2022-01-012022-06-300001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2021-04-012021-06-300001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2021-01-012021-06-300001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2022-04-012022-06-300001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2022-04-012022-06-300001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2022-01-012022-06-300001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-04-012021-06-300001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-04-012021-06-300001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2021-04-012021-06-300001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-01-012021-06-300001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-01-012021-06-300001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2021-01-012021-06-300001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-04-012022-06-300001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-04-012022-06-300001126328us-gaap:DerivativeFinancialInstrumentsAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2022-04-012022-06-300001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-01-012022-06-300001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-01-012022-06-300001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-01-012022-06-300001126328us-gaap:DerivativeFinancialInstrumentsAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2022-01-012022-06-300001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-04-012022-06-300001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-04-012022-06-300001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-04-012022-06-300001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-01-012022-06-300001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-01-012022-06-300001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2022-01-012022-06-300001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2022-01-012022-06-300001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-04-012021-06-300001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-04-012021-06-300001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-04-012021-06-300001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-01-012021-06-300001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-01-012021-06-300001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-01-012021-06-300001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:AvailableforsaleSecuritiesMember2021-01-012021-06-300001126328us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:FairValueMeasurementsRecurringMember2022-06-300001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2022-06-300001126328us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328pfg:EmployeeStockPurchasePlanMember2022-01-012022-06-300001126328pfg:EmployeeStockPurchasePlanMember2022-06-300001126328us-gaap:OtherContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-06-300001126328us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-06-300001126328us-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2022-06-300001126328us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-06-300001126328us-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2022-06-300001126328us-gaap:EquityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-06-300001126328us-gaap:CreditRiskContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-06-300001126328us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-06-300001126328us-gaap:DesignatedAsHedgingInstrumentMember2022-06-300001126328us-gaap:OtherContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2021-12-310001126328us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2021-12-310001126328us-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-12-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2021-12-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-12-310001126328us-gaap:EquityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2021-12-310001126328us-gaap:CreditRiskContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2021-12-310001126328us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2021-12-310001126328us-gaap:DesignatedAsHedgingInstrumentMember2021-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2022-06-300001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2022-06-300001126328us-gaap:FairValueMeasurementsRecurringMember2022-06-300001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328us-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328us-gaap:StockOptionMember2022-06-300001126328us-gaap:InterestRateSwapMember2022-06-300001126328us-gaap:ForeignExchangeForwardMember2022-06-300001126328us-gaap:CurrencySwapMember2022-06-300001126328us-gaap:CreditDefaultSwapMember2022-06-300001126328pfg:InterestRateOptionsMember2022-06-300001126328pfg:InterestRateForwardsMember2022-06-300001126328us-gaap:StockOptionMember2021-12-310001126328us-gaap:InterestRateSwapMember2021-12-310001126328us-gaap:ForeignExchangeForwardMember2021-12-310001126328us-gaap:CurrencySwapMember2021-12-310001126328us-gaap:CreditDefaultSwapMember2021-12-310001126328pfg:InterestRateOptionsMember2021-12-310001126328pfg:InterestRateForwardsMember2021-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:USTreasuryAndGovernmentMember2022-06-300001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:MortgageBackedSecuritiesMember2022-06-300001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:CorporateDebtSecuritiesMember2022-06-300001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-06-300001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:USTreasuryAndGovernmentMember2021-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:CorporateDebtSecuritiesMember2021-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:CommercialMortgageBackedSecuritiesMember2021-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:CollateralizedDebtObligationsMember2021-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMember2022-06-300001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMember2022-04-012022-06-300001126328us-gaap:CorporateDebtSecuritiesMember2022-01-012022-06-300001126328us-gaap:ResidentialMortgageMember2022-01-012022-06-300001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2022-01-012022-06-300001126328pfg:NonperformingMemberus-gaap:ResidentialMortgageMember2022-01-012022-06-300001126328srt:StandardPoorsBBRatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2022-01-012022-06-300001126328srt:StandardPoorsBBBRatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2022-01-012022-06-300001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:SovereignDebtMember2022-01-012022-06-300001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2022-01-012022-06-300001126328pfg:SingleNameCreditDefaultSwapsMember2022-01-012022-06-300001126328srt:StandardPoorsBBBRatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2021-01-012021-12-310001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:SovereignDebtMember2021-01-012021-12-310001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2021-01-012021-12-310001126328pfg:SingleNameCreditDefaultSwapsMember2021-01-012021-12-310001126328srt:StandardPoorsBBRatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2022-06-300001126328srt:StandardPoorsBBBRatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2022-06-300001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:SovereignDebtMember2022-06-300001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2022-06-300001126328pfg:SingleNameCreditDefaultSwapsMember2022-06-300001126328srt:StandardPoorsBBBRatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2021-12-310001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:SovereignDebtMember2021-12-310001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2021-12-310001126328pfg:SingleNameCreditDefaultSwapsMember2021-12-310001126328us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2022-06-300001126328us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2021-12-310001126328us-gaap:DerivativeFinancialInstrumentsAssetsMember2022-06-300001126328pfg:ReverseRepurchaseAgreementMember2022-06-300001126328us-gaap:DerivativeFinancialInstrumentsAssetsMember2021-12-310001126328pfg:ReverseRepurchaseAgreementMember2021-12-310001126328us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2022-06-300001126328us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2021-12-310001126328pfg:ReclassificationActuarialBalanceRecohortingUlsgBusinessMember2022-04-012022-06-300001126328pfg:ReclassificationActuarialBalanceRecohortingUlsgBusinessMember2022-01-012022-06-300001126328us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2022-06-300001126328us-gaap:FairValueInputsLevel1Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2022-06-300001126328us-gaap:EstimateOfFairValueFairValueDisclosureMember2022-06-300001126328us-gaap:CarryingReportedAmountFairValueDisclosureMember2022-06-300001126328us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310001126328us-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310001126328us-gaap:CarryingReportedAmountFairValueDisclosureMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember2022-06-300001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember2021-12-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-06-300001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-06-300001126328us-gaap:MaterialReconcilingItemsMember2022-04-012022-06-300001126328us-gaap:MaterialReconcilingItemsMember2022-01-012022-06-300001126328us-gaap:NoncontrollingInterestMember2022-04-012022-06-300001126328us-gaap:AdditionalPaidInCapitalMember2022-04-012022-06-300001126328us-gaap:NoncontrollingInterestMember2022-01-012022-06-300001126328us-gaap:AdditionalPaidInCapitalMember2022-01-012022-06-300001126328us-gaap:RetainedEarningsMember2021-04-012021-06-300001126328us-gaap:AdditionalPaidInCapitalMember2021-04-012021-06-3000011263282021-04-012021-06-300001126328us-gaap:NoncontrollingInterestMember2021-01-012021-06-300001126328us-gaap:AdditionalPaidInCapitalMember2021-01-012021-06-3000011263282021-01-012021-06-300001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-04-012022-06-300001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-04-012022-06-300001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-04-012022-06-3000011263282022-04-012022-06-300001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-01-012022-06-300001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-01-012022-06-300001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-01-012022-06-300001126328us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2021-04-012021-06-300001126328us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2021-01-012021-06-300001126328us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2022-04-012022-06-300001126328us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2022-04-012022-06-300001126328us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2022-01-012022-06-300001126328us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2022-01-012022-06-300001126328us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2021-04-012021-06-300001126328us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2021-01-012021-06-3000011263282022-06-3000011263282021-12-310001126328pfg:AcceleratedShareRepurchaseProgramMarch2022Memberus-gaap:CommonStockMember2022-06-012022-06-300001126328pfg:AcceleratedShareRepurchaseProgramMarch2022Memberus-gaap:CommonStockMember2022-03-012022-03-3100011263282022-08-0100011263282022-01-012022-06-30xbrli:sharesiso4217:USDxbrli:pureiso4217:USDxbrli:sharespfg:itempfg:contract

Table of Contents

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2022

OR

TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

1-16725

(Commission file number)

PRINCIPAL FINANCIAL GROUP, INC.

(Exact name of registrant as specified in its charter)

Delaware

    

42-1520346

(State or other jurisdiction of incorporation or organization)

(I.R.S. Employer Identification Number)

711 High Street, Des Moines, Iowa 50392

(Address of principal executive offices)

(515) 247-5111

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading symbol(s)

Name of each exchange on which registered

Common Stock

PFG

Nasdaq Global Select Market

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes    No 

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes    No 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer 

Accelerated filer 

Non-accelerated filer 

Smaller reporting company 

Emerging growth company 

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. 

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes    No 

The total number of shares of the registrant’s Common Stock, $0.01 par value, outstanding as of August 1, 2022, was 249,237,335.

Table of Contents

PRINCIPAL FINANCIAL GROUP, INC.

TABLE OF CONTENTS

    

Page

Part I - FINANCIAL INFORMATION

Item 1.

Financial Statements

3

Condensed Consolidated Statements of Financial Position as of June 30, 2022 (Unaudited) and December 31, 2021

3

Unaudited Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2022 and 2021

4

Unaudited Condensed Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2022 and 2021

5

Unaudited Condensed Consolidated Statements of Stockholders’ Equity for the three and six months ended June 30, 2022 and 2021

6

Unaudited Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2022 and 2021

8

Notes to Unaudited Condensed Consolidated Financial Statements — June 30, 2022

9

Item 2.

Management’s Discussion and Analysis of Financial Condition and Results of Operations

90

Item 3.

Quantitative and Qualitative Disclosures about Market Risk

124

Item 4.

Controls and Procedures

131

Part II — OTHER INFORMATION

Item 1.

Legal Proceedings

131

Item 1A.

Risk Factors

131

Item 2.

Unregistered Sales of Equity Securities and Use of Proceeds

132

Item 6.

Exhibits

133

Signature

134

2

Table of Contents

PART I — FINANCIAL INFORMATION

Item 1. Financial Statements

Principal Financial Group, Inc.

Condensed Consolidated Statements of Financial Position

June 30, 

December 31, 

    

2022

    

2021

(Unaudited)

(in millions)

Assets

Fixed maturities, available-for-sale

$

67,205.6

$

78,154.5

Fixed maturities, trading

 

391.3

 

422.2

Equity securities (2022 and 2021 include $711.6 million and $783.7 million related to consolidated variable interest entities)

 

1,699.8

 

2,347.2

Mortgage loans (2022 and 2021 include $1,525.6 million and $1,260.1 million related to consolidated variable interest entities)

 

20,277.2

 

19,668.7

Real estate (2022 and 2021 include $541.0 million and $672.0 million related to consolidated variable interest entities)

 

2,073.6

 

2,075.4

Policy loans

 

766.6

 

759.6

Other investments (2022 and 2021 include $410.9 million and $522.8 million related to consolidated variable interest entities)

 

5,427.6

 

5,478.3

Total investments

 

97,841.7

 

108,905.9

Cash and cash equivalents (2022 and 2021 include $20.1 million and $49.6 million related to consolidated variable interest entities)

 

3,173.1

 

2,332.0

Accrued investment income

 

712.4

 

695.8

Reinsurance recoverable and deposit receivable

23,601.1

1,186.5

Premiums due and other receivables

 

4,683.9

 

655.9

Deferred acquisition costs

4,340.3

 

3,757.5

Property and equipment

993.3

 

1,038.0

Goodwill

1,588.5

 

1,627.6

Other intangibles

1,546.0

 

1,600.6

Separate account assets (2022 and 2021 include $30,530.6 million and $33,957.7 million related to consolidated variable interest entities)

 

153,819.3

 

182,345.4

Other assets

 

920.6

 

512.0

Total assets

$

293,220.2

$

304,657.2

Liabilities

Contractholder funds (2022 and 2021 include $335.5 million and $344.0 million related to consolidated variable interest entities)

$

43,923.4

$

43,598.0

Future policy benefits and claims

 

43,311.7

 

43,948.1

Other policyholder funds

 

895.5

 

1,071.0

Short-term debt

 

66.9

 

79.8

Long-term debt

 

4,280.7

 

4,280.2

Income taxes currently payable

 

22.3

 

15.5

Deferred income taxes

 

1,421.8

 

2,320.2

Separate account liabilities (2022 and 2021 include $30,530.6 million and $33,957.7 million related to consolidated variable interest entities)

 

153,819.3

 

182,345.4

Funds withheld payable

22,530.8

Other liabilities (2022 and 2021 include $88.8 million and $58.7 million related to consolidated variable interest entities)

 

11,600.7

 

10,540.7

Total liabilities

 

281,873.1

288,198.9

Redeemable noncontrolling interest (2022 and 2021 include $240.8 million and $304.0 million related to consolidated variable interest entities)

 

268.5

 

332.5

Stockholders’ equity

Common stock, par value $0.01 per share; 2,500.0 million shares authorized; 487.2 million and 484.9 million shares issued as of 2022 and 2021; 249.9 million and 261.7 million shares outstanding as of 2022 and 2021

 

4.9

 

4.8

Additional paid-in capital

 

10,553.5

 

10,495.0

Retained earnings

 

15,985.6

 

12,884.5

Accumulated other comprehensive income (loss)

 

(5,630.1)

 

1,610.9

Treasury stock, at cost (237.3 million and 223.2 million shares as of 2022 and 2021)

 

(9,877.1)

 

(8,925.8)

Total stockholders’ equity attributable to Principal Financial Group, Inc.

 

11,036.8

 

16,069.4

Noncontrolling interest

 

41.8

 

56.4

Total stockholders’ equity

 

11,078.6

 

16,125.8

Total liabilities and stockholders’ equity

$

293,220.2

$

304,657.2

See accompanying notes.

3

Table of Contents

Principal Financial Group, Inc.

Condensed Consolidated Statements of Operations
(Unaudited)

For the three months ended

For the six months ended

June 30, 

June 30, 

    

2022

    

2021

    

2022

    

2021

(in millions, except per share data)

Revenues

Premiums and other considerations

$

1,366.2

$

1,269.7

$

2,253.6

$

2,104.8

Fees and other revenues

 

947.6

 

1,265.3

2,162.6

2,459.2

Net investment income