http://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://principal.com/20221231#OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortizationhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20221231#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20221231#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20221231#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20221231#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20221231#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20221231#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20221231#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20221231#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20221231#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20221231#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20221231#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20221231#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20221231#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20221231#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20221231#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20221231#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20221231#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20221231#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20221231#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20221231#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20221231#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20221231#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20221231#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20221231#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#GainLossOnInvestments http://principal.com/20221231#ChangeInFairValueOfFundsWithheldEmbeddedDerivativehttp://principal.com/20221231#OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax http://principal.com/20221231#OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTaxhttp://fasb.org/us-gaap/2022#LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpensehttp://fasb.org/us-gaap/2022#LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpensehttp://fasb.org/us-gaap/2022#LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpensehttp://fasb.org/us-gaap/2022#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortizationhttp://fasb.org/us-gaap/2022#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortizationhttp://fasb.org/us-gaap/2022#OtherLiabilitieshttp://fasb.org/us-gaap/2022#OtherLiabilities0001126328--12-312022FYfalse2022-12-310.0605http://fasb.org/us-gaap/2022#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortizationhttp://fasb.org/us-gaap/2022#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortizationhttp://fasb.org/us-gaap/2022#OtherLiabilitieshttp://fasb.org/us-gaap/2022#OtherLiabilitieshttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMemberhttp://fasb.org/us-gaap/2022#ValuationTechniqueDiscountedCashFlowMember4811600000171060000013958000000001126328us-gaap:TreasuryStockCommonMember2022-01-012022-12-310001126328us-gaap:TreasuryStockCommonMember2021-01-012021-12-310001126328us-gaap:TreasuryStockCommonMember2020-01-012020-12-310001126328pfg:TradingSecuritiesMemberus-gaap:DebtSecuritiesMember2022-12-310001126328pfg:AvailableForSaleSecurityMemberus-gaap:USTreasuryAndGovernmentMember2022-12-310001126328pfg:AvailableForSaleSecurityMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001126328pfg:AvailableForSaleSecurityMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001126328pfg:AvailableForSaleSecurityMemberus-gaap:RedeemablePreferredStockMember2022-12-310001126328pfg:AvailableForSaleSecurityMemberus-gaap:PublicUtilityBondsMember2022-12-310001126328pfg:AvailableForSaleSecurityMemberus-gaap:OtherDebtSecuritiesMember2022-12-310001126328pfg:AvailableForSaleSecurityMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2022-12-310001126328pfg:AvailableForSaleSecurityMemberus-gaap:DebtSecuritiesMember2022-12-310001126328pfg:AvailableForSaleSecurityMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001126328pfg:AvailableForSaleSecurityMemberus-gaap:CollateralizedDebtObligationsMember2022-12-310001126328pfg:AvailableForSaleSecurityMemberus-gaap:AllOtherCorporateBondsMember2022-12-310001126328us-gaap:RealEstateInvestmentMember2022-12-310001126328us-gaap:RealEstateAcquiredInSatisfactionOfDebtMember2022-12-310001126328us-gaap:PublicUtilityEquitiesMember2022-12-310001126328us-gaap:PolicyLoansMember2022-12-310001126328us-gaap:OtherLongTermInvestmentsMember2022-12-310001126328us-gaap:NonredeemablePreferredStockMember2022-12-310001126328us-gaap:IndustrialMiscellaneousAndAllOthersMember2022-12-310001126328us-gaap:EquitySecuritiesMember2022-12-310001126328us-gaap:BanksTrustAndInsuranceEquitiesMember2022-12-310001126328pfg:OtherCorporateEquitiesMember2022-12-310001126328pfg:MortgageLoansMember2022-12-310001126328us-gaap:TreasuryStockCommonMember2022-12-310001126328us-gaap:RetainedEarningsMember2022-12-310001126328us-gaap:NoncontrollingInterestMember2022-12-310001126328us-gaap:AdditionalPaidInCapitalMember2022-12-310001126328us-gaap:TreasuryStockCommonMember2021-12-310001126328us-gaap:RetainedEarningsMember2021-12-310001126328us-gaap:NoncontrollingInterestMember2021-12-310001126328us-gaap:AdditionalPaidInCapitalMember2021-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201613Memberus-gaap:RetainedEarningsMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201613Member2020-12-310001126328us-gaap:TreasuryStockCommonMember2020-12-310001126328us-gaap:RetainedEarningsMember2020-12-310001126328us-gaap:NoncontrollingInterestMember2020-12-310001126328us-gaap:AdditionalPaidInCapitalMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201613Memberus-gaap:RetainedEarningsMember2019-12-310001126328us-gaap:TreasuryStockCommonMember2019-12-310001126328us-gaap:RetainedEarningsMember2019-12-310001126328us-gaap:NoncontrollingInterestMember2019-12-310001126328us-gaap:AdditionalPaidInCapitalMember2019-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201812Memberus-gaap:RetainedEarningsMember2023-01-010001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201812Memberus-gaap:AccumulatedOtherComprehensiveIncomeMember2023-01-010001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201812Member2023-01-010001126328us-gaap:AccumulatedTranslationAdjustmentMember2022-12-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-12-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-12-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2021-12-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-12-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201613Memberus-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-12-310001126328srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AccountingStandardsUpdate201613Memberpfg:AccumulatedNoncreditOtherThanTemporaryImpairmentMember2020-12-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2020-12-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-12-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-12-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2019-12-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-12-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2019-12-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2019-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2019-12-310001126328pfg:AccumulatedNoncreditOtherThanTemporaryImpairmentMember2019-12-310001126328pfg:SubsidiariesPrincipalLifeInsuranceCompanyMember2022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMember2021-01-012021-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMember2020-01-012020-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractsAccidentYear2018Member2022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractsAccidentYear2017Member2022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2016Member2022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2015Member2022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2014Member2022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2013Member2022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractAccidentYear2022Member2022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractAccidentYear2021Member2022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractAccidentYear2020Member2022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractAccidentYear2019Member2022-12-310001126328pfg:GroupLifeMemberus-gaap:ShortDurationInsuranceContractAccidentYear2022Member2022-12-310001126328pfg:GroupLifeMemberus-gaap:ShortDurationInsuranceContractAccidentYear2021Member2022-12-310001126328pfg:DentalVisionShortTermDisabilityCriticalIllnessAccidentPfmlMemberus-gaap:ShortDurationInsuranceContractAccidentYear2022Member2022-12-310001126328pfg:DentalVisionShortTermDisabilityCriticalIllnessAccidentPfmlMemberus-gaap:ShortDurationInsuranceContractAccidentYear2021Member2022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractsAccidentYear2018Member2021-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractsAccidentYear2017Member2021-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2016Member2021-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2015Member2021-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2014Member2021-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2013Member2021-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractAccidentYear2021Member2021-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractAccidentYear2020Member2021-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractAccidentYear2019Member2021-12-310001126328pfg:GroupLifeMemberus-gaap:ShortDurationInsuranceContractAccidentYear2021Member2021-12-310001126328pfg:DentalVisionShortTermDisabilityCriticalIllnessAccidentPfmlMemberus-gaap:ShortDurationInsuranceContractAccidentYear2021Member2021-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractsAccidentYear2018Member2020-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractsAccidentYear2017Member2020-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2016Member2020-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2015Member2020-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2014Member2020-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2013Member2020-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractAccidentYear2020Member2020-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractAccidentYear2019Member2020-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractsAccidentYear2018Member2019-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractsAccidentYear2017Member2019-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2016Member2019-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2015Member2019-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2014Member2019-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2013Member2019-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractAccidentYear2019Member2019-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractsAccidentYear2018Member2018-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractsAccidentYear2017Member2018-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2016Member2018-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2015Member2018-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2014Member2018-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2013Member2018-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortDurationInsuranceContractsAccidentYear2017Member2017-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2016Member2017-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2015Member2017-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2014Member2017-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2013Member2017-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2016Member2016-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2015Member2016-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2014Member2016-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2013Member2016-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2015Member2015-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2014Member2015-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2013Member2015-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2014Member2014-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2013Member2014-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMemberus-gaap:ShortdurationInsuranceContractsAccidentYear2013Member2013-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMember2022-01-012022-12-310001126328pfg:GroupLifeMember2022-01-012022-12-310001126328pfg:DentalVisionShortTermDisabilityCriticalIllnessAccidentPfmlMember2022-01-012022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMember2020-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMembersrt:MinimumMember2022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMembersrt:MaximumMember2022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMembersrt:MinimumMember2021-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMembersrt:MaximumMember2021-12-310001126328pfg:DentalVisionShortTermDisabilityCriticalIllnessAccidentPfmlMember2022-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMember2021-12-310001126328pfg:GroupLifeMember2021-12-310001126328pfg:DentalVisionShortTermDisabilityCriticalIllnessAccidentPfmlMember2021-12-310001126328us-gaap:CommonStockMember2022-12-310001126328us-gaap:CommonStockMember2021-12-310001126328us-gaap:CommonStockMember2020-12-310001126328us-gaap:CommonStockMember2019-12-310001126328us-gaap:EmployeeStockOptionMemberpfg:ExercisePriceTotalRangeMember2022-01-012022-12-310001126328us-gaap:EmployeeStockOptionMemberpfg:ExercisePriceRange5Member2022-01-012022-12-310001126328us-gaap:EmployeeStockOptionMemberpfg:ExercisePriceRange4Member2022-01-012022-12-310001126328us-gaap:EmployeeStockOptionMemberpfg:ExercisePriceRange3Member2022-01-012022-12-310001126328us-gaap:EmployeeStockOptionMemberpfg:ExercisePriceRange2Member2022-01-012022-12-310001126328us-gaap:EmployeeStockOptionMemberpfg:ExercisePriceRange1Member2022-01-012022-12-310001126328us-gaap:EmployeeStockOptionMemberpfg:ExercisePriceTotalRangeMember2022-12-310001126328us-gaap:EmployeeStockOptionMemberpfg:ExercisePriceRange5Member2022-12-310001126328us-gaap:EmployeeStockOptionMemberpfg:ExercisePriceRange4Member2022-12-310001126328us-gaap:EmployeeStockOptionMemberpfg:ExercisePriceRange3Member2022-12-310001126328us-gaap:EmployeeStockOptionMemberpfg:ExercisePriceRange2Member2022-12-310001126328us-gaap:EmployeeStockOptionMemberpfg:ExercisePriceRange1Member2022-12-310001126328us-gaap:EmployeeStockOptionMember2021-12-310001126328pfg:StockBasedCompensationPlans2014StockIncentivePlanAmendedAndRestated2010StockIncentivePlanStockIncentivePlanMember2021-01-012021-12-310001126328pfg:StockBasedCompensationPlans2014StockIncentivePlanAmendedAndRestated2010StockIncentivePlanStockIncentivePlanMember2020-01-012020-12-310001126328pfg:StockBasedCompensationPlans2021StockIncentivePlanMember2022-12-310001126328pfg:StockBasedCompensationPlans2014StockIncentivePlanAmendedAndRestated2010StockIncentivePlanStockIncentivePlanMember2022-01-012022-12-310001126328us-gaap:RestrictedStockUnitsRSUMember2021-12-310001126328us-gaap:PerformanceSharesMember2021-12-310001126328us-gaap:RestrictedStockUnitsRSUMemberpfg:StockBasedCompensationPlans2021StockIncentivePlan2020DirectorsStockPlan2014DirectorsStockPlanAnd2005DirectorsStockPlanMember2022-01-012022-12-310001126328us-gaap:RestrictedStockUnitsRSUMemberpfg:StockBasedCompensationPlans2014StockIncentivePlanAmendedAndRestated2010StockIncentivePlanStockIncentivePlanMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:DepositAccountMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentSpecialtyBenefitsInsuranceMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalInternationalMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalGlobalInvestorsMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalInternationalMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalGlobalInvestorsMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentCorporateMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMembersrt:LatinAmericaMemberpfg:SegmentPrincipalInternationalMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMembersrt:AsiaMemberpfg:SegmentPrincipalInternationalMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentUSInsuranceSolutionsEliminationsMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentGeographicalAreaEliminationsMemberpfg:SegmentPrincipalInternationalMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:ProductsAndServicesEliminationsMemberpfg:SegmentCorporateMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:CorporateAndRegionalMemberpfg:SegmentPrincipalInternationalMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentCorporateMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:DepositAccountMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentSpecialtyBenefitsInsuranceMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalInternationalMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalGlobalInvestorsMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalInternationalMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalGlobalInvestorsMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentCorporateMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMembersrt:LatinAmericaMemberpfg:SegmentPrincipalInternationalMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMembersrt:AsiaMemberpfg:SegmentPrincipalInternationalMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentUSInsuranceSolutionsEliminationsMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentGeographicalAreaEliminationsMemberpfg:SegmentPrincipalInternationalMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:ProductsAndServicesEliminationsMemberpfg:SegmentCorporateMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:CorporateAndRegionalMemberpfg:SegmentPrincipalInternationalMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentCorporateMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:DepositAccountMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentSpecialtyBenefitsInsuranceMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:AdministrativeServiceMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalInternationalMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:ManagementServiceMemberpfg:SegmentPrincipalGlobalInvestorsMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalInternationalMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentPrincipalGlobalInvestorsMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberus-gaap:FinancialServiceOtherMemberpfg:SegmentCorporateMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMembersrt:LatinAmericaMemberpfg:SegmentPrincipalInternationalMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMembersrt:AsiaMemberpfg:SegmentPrincipalInternationalMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentUSInsuranceSolutionsEliminationsMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentGeographicalAreaEliminationsMemberpfg:SegmentPrincipalInternationalMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:ProductsAndServicesEliminationsMemberpfg:SegmentCorporateMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:CorporateAndRegionalMemberpfg:SegmentPrincipalInternationalMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:CommissionIncomeMemberpfg:SegmentCorporateMember2020-01-012020-12-310001126328pfg:NotesPayable6.05PercentDue2036Memberus-gaap:SeniorNotesMember2016-10-012016-12-310001126328pfg:NotesPayable7.875PercentDue2014Memberus-gaap:SeniorNotesMember2012-09-052012-09-050001126328pfg:OperatingExpensesMemberus-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2022-01-012022-12-310001126328pfg:NetRealizedCapitalGainsLossesMemberus-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2022-01-012022-12-310001126328pfg:OperatingExpensesMemberus-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-01-012021-12-310001126328pfg:NetRealizedCapitalGainsLossesMemberus-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2021-01-012021-12-310001126328pfg:NetRealizedCapitalGainsLossesMemberus-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-01-012021-12-310001126328pfg:OperatingExpensesMemberus-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2020-01-012020-12-310001126328pfg:NetRealizedCapitalGainsLossesMemberus-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2020-01-012020-12-310001126328pfg:NetRealizedCapitalGainsLossesMemberus-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2020-01-012020-12-310001126328pfg:NetIncomeLossAttributableToNoncontrollingInterestMemberus-gaap:AccumulatedForeignCurrencyAdjustmentAttributableToNoncontrollingInterestMember2020-01-012020-12-310001126328pfg:SubsegmentIndividualLifeInsuranceMember2022-01-012022-12-310001126328pfg:SubsegmentIndividualLifeInsuranceMember2021-01-012021-12-310001126328pfg:SubsegmentIndividualLifeInsuranceMember2020-01-012020-12-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2022-01-012022-12-310001126328us-gaap:NetInvestmentHedgingMember2022-01-012022-12-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2021-01-012021-12-310001126328us-gaap:NetInvestmentHedgingMember2021-01-012021-12-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2020-01-012020-12-310001126328us-gaap:NetInvestmentHedgingMember2020-01-012020-12-310001126328pfg:InvestmentContractMemberus-gaap:InterestRateContractMember2022-01-012022-12-310001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:InterestRateContractMember2022-01-012022-12-310001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:ForeignExchangeContractMember2022-01-012022-12-310001126328pfg:InvestmentContractMemberus-gaap:InterestRateContractMember2021-01-012021-12-310001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:ForeignExchangeContractMember2021-01-012021-12-310001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:InterestRateContractMember2020-01-012020-12-310001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMemberus-gaap:ForeignExchangeContractMember2020-01-012020-12-310001126328us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2022-01-012022-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2022-01-012022-12-310001126328us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-01-012021-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-01-012021-12-310001126328us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2020-01-012020-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2020-01-012020-12-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2022-01-012022-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-01-012022-12-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2021-01-012021-12-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-01-012021-12-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-01-012021-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-01-012021-12-310001126328us-gaap:AccumulatedTranslationAdjustmentMember2020-01-012020-12-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-01-012020-12-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-01-012020-12-310001126328us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-01-012020-12-310001126328us-gaap:AssetPledgedAsCollateralMemberus-gaap:FederalHomeLoanBankAdvancesMember2022-12-310001126328us-gaap:AssetPledgedAsCollateralMemberus-gaap:FederalHomeLoanBankAdvancesMember2021-12-310001126328pfg:LawsuitAllegingBreachOfFiduciaryDutyInConnectionWithPrincipalFixedIncomeOptionMember2022-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:CreditFacilityMaturingOctober2027Member2022-12-310001126328pfg:PrincipalInternationalChileMemberpfg:UnsecuredLineOfCreditMember2022-12-310001126328pfg:PrincipalInternationalChileMemberpfg:UnsecuredLineOfCreditMember2021-12-310001126328pfg:PrincipalFinancialServicesIncAndPrincipalLifeInsuranceCompanyAndPrincipalFinancialServicesVLTDAndPrincipalFinancialGroupCoborrowersMemberpfg:CreditFacilityMaturingNovember2023Member2021-12-310001126328pfg:PrincipalFinancialServicesIncAndPrincipalLifeInsuranceCompanyAndPrincipalFinancialGroupCoborrowersMemberpfg:CreditFacilityMaturingNovember2023Member2021-12-310001126328pfg:WMAdvisorsMember2022-12-310001126328pfg:WMAdvisorsMember2021-12-310001126328pfg:GuaranteesToUnconsolidatedTrustsUnderContingentFundingAgreementsMember2022-12-310001126328pfg:GuaranteesToThirdPartiesPrimarilyRelatedToFormerSubsidiariesAndJointVenturesMember2022-12-310001126328pfg:SegmentUSInsuranceSolutionsMember2020-12-310001126328pfg:SegmentRetirementAndIncomeSolutionsMember2020-12-310001126328pfg:SegmentPrincipalInternationalMember2020-12-310001126328pfg:SegmentPrincipalGlobalInvestorsMember2020-12-310001126328pfg:SegmentCorporateMember2020-12-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2022-01-012022-12-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2021-01-012021-12-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2020-01-012020-12-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2020-01-012020-12-310001126328us-gaap:NetInvestmentHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2020-01-012020-12-310001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2022-01-012022-12-310001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2021-01-012021-12-310001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2020-01-012020-12-310001126328us-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2022-01-012022-12-310001126328us-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2022-01-012022-12-310001126328us-gaap:CashFlowHedgingMemberpfg:BenefitsClaimsAndSettlementExpensesMember2022-01-012022-12-310001126328us-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2021-01-012021-12-310001126328us-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2021-01-012021-12-310001126328us-gaap:CashFlowHedgingMemberpfg:BenefitsClaimsAndSettlementExpensesMember2021-01-012021-12-310001126328us-gaap:CashFlowHedgingMemberpfg:NetRealizedCapitalGainsLossesMember2020-01-012020-12-310001126328us-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2020-01-012020-12-310001126328us-gaap:CashFlowHedgingMemberpfg:BenefitsClaimsAndSettlementExpensesMember2020-01-012020-12-310001126328us-gaap:OtherInvestmentsMember2022-12-310001126328us-gaap:EquitySecuritiesMember2022-12-310001126328pfg:MortgageLoansMember2022-12-310001126328pfg:FixedMaturitiesTradingMember2022-12-310001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMember2022-12-310001126328pfg:AssetsCashAndCashEquivalentsMember2022-12-310001126328pfg:AccruedInterestIncomeReceivableMember2022-12-310001126328pfg:ReinsuranceRecoverablesMember2020-01-012020-12-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancialAssetPastDueMember2022-12-310001126328us-gaap:ResidentialMortgageMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2022-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001126328pfg:StandardPoorsBPlusAndBelowRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:StandardPoorsBBPlusThruBBMinusRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:StandardPoorsBBBPlusThruBBBMinusRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:StandardPoorsAMinusAndAboveRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:PerformingMemberus-gaap:ResidentialMortgageMember2022-12-310001126328pfg:NonperformingMemberus-gaap:ResidentialMortgageMember2022-12-310001126328us-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:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2021-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001126328us-gaap:ResidentialMortgageMember2021-01-012021-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2021-01-012021-12-310001126328us-gaap:ResidentialMortgageMember2020-01-012020-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2020-01-012020-12-310001126328pfg:ReinsuranceRecoverablesMember2022-12-310001126328pfg:ReinsuranceRecoverablesMember2021-12-310001126328pfg:ReinsuranceRecoverablesMember2020-12-310001126328us-gaap:ResidentialMortgageMember2019-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2019-12-310001126328pfg:ReinsuranceRecoverablesMember2019-12-310001126328us-gaap:AssetPledgedAsCollateralWithRightMember2022-12-310001126328us-gaap:AssetPledgedAsCollateralWithRightMember2021-12-310001126328us-gaap:EquityMethodInvestmentsMember2021-01-012021-12-310001126328us-gaap:EquityMethodInvestmentsMember2020-01-012020-12-310001126328us-gaap:FairValueMeasurementsRecurringMember2020-12-310001126328us-gaap:FairValueMeasurementsRecurringMember2019-12-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2022-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328pfg:FundsWithheldPayableEmbeddedDerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2021-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2020-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2020-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2020-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2020-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2020-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2019-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2019-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2019-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2019-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2019-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2019-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2021-01-012021-12-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2022-01-012022-12-310001126328us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2022-12-310001126328us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310001126328pfg:EquityMethodInvestmentsNetInvestmentInUnconsolidatedEntitiesMember2022-12-310001126328pfg:EquityMethodInvestmentsNetInvestmentInUnconsolidatedEntitiesMember2021-12-310001126328us-gaap:EmployeeStockOptionMember2021-01-012021-12-310001126328us-gaap:EmployeeStockOptionMember2020-01-012020-12-310001126328us-gaap:EmployeeStockOptionMember2022-01-012022-12-310001126328us-gaap:RestrictedStockUnitsRSUMember2022-12-310001126328us-gaap:PerformanceSharesMember2022-12-310001126328us-gaap:EmployeeStockOptionMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLapseRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputNonPerformanceRiskMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLapseRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputNonPerformanceRiskMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputPriceVolatilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLapseRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputNonPerformanceRiskMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt: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: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:SubsegmentRetirementAndIncomeSolutionsSpreadMember2022-01-012022-12-310001126328pfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2022-01-012022-12-310001126328pfg:StandardPoorsBPlusAndBelowRatingMember2022-12-310001126328pfg:StandardPoorsBBPlusThruBBMinusRatingMember2022-12-310001126328pfg:StandardPoorsBBBPlusThruBBBMinusRatingMember2022-12-310001126328pfg:StandardPoorsAMinusAndAboveRatingMember2022-12-310001126328pfg:StandardPoorsBPlusAndBelowRatingMember2021-12-310001126328us-gaap:SingleStockFutureMember2022-12-310001126328us-gaap:EmbeddedDerivativeFinancialInstrumentsMember2022-12-310001126328pfg:InterestRateFutureMember2022-12-310001126328us-gaap:SingleStockFutureMember2021-12-310001126328us-gaap:EmbeddedDerivativeFinancialInstrumentsMember2021-12-310001126328pfg:InterestRateFutureMember2021-12-310001126328us-gaap:OtherContractMember2022-01-012022-12-310001126328us-gaap:InterestRateContractMember2022-01-012022-12-310001126328us-gaap:ForeignExchangeContractMember2022-01-012022-12-310001126328us-gaap:EquityContractMember2022-01-012022-12-310001126328us-gaap:CreditRiskContractMember2022-01-012022-12-310001126328us-gaap:OtherContractMember2021-01-012021-12-310001126328us-gaap:InterestRateContractMember2021-01-012021-12-310001126328us-gaap:ForeignExchangeContractMember2021-01-012021-12-310001126328us-gaap:EquityContractMember2021-01-012021-12-310001126328us-gaap:CreditRiskContractMember2021-01-012021-12-310001126328us-gaap:OtherContractMember2020-01-012020-12-310001126328us-gaap:InterestRateContractMember2020-01-012020-12-310001126328us-gaap:ForeignExchangeContractMember2020-01-012020-12-310001126328us-gaap:EquityContractMember2020-01-012020-12-310001126328us-gaap:CreditRiskContractMember2020-01-012020-12-310001126328pfg:SegmentCorporateMember2022-01-012022-12-310001126328pfg:SegmentCorporateMember2021-01-012021-12-310001126328pfg:SegmentCorporateMember2020-01-012020-12-310001126328us-gaap:QualifiedPlanMemberpfg:DefinedContributionPlanGeneralParticipantMember2022-01-012022-12-310001126328us-gaap:NonqualifiedPlanMemberpfg:DefinedContributionPlanGrandfatheredChoiceParticipantMember2022-01-012022-12-310001126328us-gaap:NonqualifiedPlanMemberpfg:DefinedContributionPlanGeneralParticipantMember2022-01-012022-12-310001126328srt:MinimumMemberus-gaap:FixedIncomeSecuritiesMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328srt:MinimumMemberus-gaap:DefinedBenefitPlanEquitySecuritiesMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328srt:MinimumMemberpfg:PrivateInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328srt:MaximumMemberus-gaap:FixedIncomeSecuritiesMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328srt:MaximumMemberus-gaap:DefinedBenefitPlanEquitySecuritiesMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328srt:MaximumMemberpfg:PrivateInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel1Memberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel2Memberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:HedgeFundsMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:DefinedBenefitPlanRealEstateMemberus-gaap:FairValueInputsLevel2Memberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesUsLargeCapMemberus-gaap:FairValueInputsLevel2Memberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberus-gaap:FairValueInputsLevel2Memberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Memberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328pfg:SingleClientSeparateAccountsInvestedInPooledSeparateAccountMemberus-gaap:FairValueInputsLevel2Memberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328pfg:OtherPlanAssetsMemberus-gaap:FairValueInputsLevel2Memberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328pfg:DefinedBenefitPlanEquitySecuritiesUsSmallMidCapMemberus-gaap:FairValueInputsLevel2Memberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328pfg:BalancedAssetAllocationPortfoliosMemberus-gaap:FairValueInputsLevel2Memberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:USTreasuryAndGovernmentMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:OtherDebtSecuritiesMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:HedgeFundsMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:DefinedBenefitPlanRealEstateMemberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesUsLargeCapMemberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:CorporateDebtSecuritiesMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328pfg:SingleClientSeparateAccountsInvestedInPooledSeparateAccountMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328pfg:OtherPlanAssetsMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328pfg:DefinedBenefitPlanEquitySecuritiesUsSmallMidCapMemberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328pfg:BalancedAssetAllocationPortfoliosMemberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:FixedIncomeSecuritiesMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-12-310001126328us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-12-310001126328us-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-12-310001126328us-gaap:FixedIncomeSecuritiesMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-12-310001126328us-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-12-310001126328us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel1Memberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel2Memberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:HedgeFundsMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:DefinedBenefitPlanRealEstateMemberus-gaap:FairValueInputsLevel2Memberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesUsLargeCapMemberus-gaap:FairValueInputsLevel2Memberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberus-gaap:FairValueInputsLevel2Memberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Memberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328pfg:SingleClientSeparateAccountsInvestedInPooledSeparateAccountMemberus-gaap:FairValueInputsLevel2Memberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328pfg:OtherPlanAssetsMemberus-gaap:FairValueInputsLevel2Memberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328pfg:DefinedBenefitPlanEquitySecuritiesUsSmallMidCapMemberus-gaap:FairValueInputsLevel2Memberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328pfg:BalancedAssetAllocationPortfoliosMemberus-gaap:FairValueInputsLevel2Memberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:USTreasuryAndGovernmentMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:OtherDebtSecuritiesMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:HedgeFundsMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:DefinedBenefitPlanRealEstateMemberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesUsLargeCapMemberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328pfg:SingleClientSeparateAccountsInvestedInPooledSeparateAccountMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328pfg:OtherPlanAssetsMemberpfg:SingleClientSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328pfg:DefinedBenefitPlanEquitySecuritiesUsSmallMidCapMemberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328pfg:BalancedAssetAllocationPortfoliosMemberpfg:PooledSeparateAccountInvestmentsMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:FixedIncomeSecuritiesMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310001126328us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310001126328us-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310001126328us-gaap:FixedIncomeSecuritiesMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310001126328us-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310001126328us-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310001126328srt:MaximumMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:PensionPlansDefinedBenefitMember2020-12-310001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-12-310001126328pfg:PensionPlansDefinedBenefitCashBalanceBenefitMember2022-01-012022-12-310001126328pfg:PensionPlansDefinedBenefitTraditionalBenefitMember2021-01-012021-12-310001126328pfg:PensionPlansDefinedBenefitCashBalanceBenefitMember2021-01-012021-12-310001126328pfg:PensionPlansDefinedBenefitTraditionalBenefitMember2020-01-012020-12-310001126328pfg:PensionPlansDefinedBenefitCashBalanceBenefitMember2020-01-012020-12-310001126328pfg:Post65MedicalPlansMember2022-01-012022-12-310001126328pfg:HomeOfficeMedicalAndLifePlansMember2022-01-012022-12-310001126328pfg:AgentMedicalAndLifePlanMember2022-01-012022-12-310001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-04-012020-12-310001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-01-012020-03-310001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-01-012020-12-310001126328us-gaap:PensionPlansDefinedBenefitMember2020-01-012020-12-310001126328us-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:NonqualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:NonqualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328pfg:SegmentUSInsuranceSolutionsMember2022-01-012022-12-310001126328pfg:SegmentPrincipalInternationalMember2022-01-012022-12-310001126328pfg:SegmentUSInsuranceSolutionsMember2021-01-012021-12-310001126328pfg:SegmentPrincipalInternationalMember2021-01-012021-12-310001126328pfg:SegmentUSInsuranceSolutionsMember2020-01-012020-12-310001126328pfg:SegmentPrincipalInternationalMember2020-01-012020-12-310001126328us-gaap:DomesticCountryMember2022-12-310001126328us-gaap:DomesticCountryMember2021-12-310001126328us-gaap:StateAndLocalJurisdictionMember2022-12-310001126328us-gaap:ForeignCountryMember2022-12-310001126328us-gaap:StateAndLocalJurisdictionMember2021-12-310001126328us-gaap:ForeignCountryMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputComparabilityAdjustmentMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2022-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-12-310001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:MarketApproachValuationTechniqueMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDefaultRateMemberus-gaap:MarketApproachValuationTechniqueMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MinimumMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:MaximumMemberus-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountForLackOfMarketabilityMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputLossSeverityMemberus-gaap:MarketApproachValuationTechniqueMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDefaultRateMemberus-gaap:MarketApproachValuationTechniqueMember2021-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328srt:WeightedAverageMemberus-gaap:FairValueInputsLevel3Memberpfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLongDurationInterestRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMemberus-gaap:MeasurementInputDiscountRateMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMember2022-01-012022-12-310001126328us-gaap:CollateralizedDebtObligationsMember2021-01-012021-12-310001126328us-gaap:OtherDebtSecuritiesMember2021-01-012021-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMember2021-01-012021-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMember2020-01-012020-12-310001126328us-gaap:CollateralizedDebtObligationsMember2020-01-012020-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2022-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2022-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:OtherDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CollateralizedDebtObligationsMember2022-12-310001126328us-gaap: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:CorporateDebtSecuritiesMember2020-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMember2020-12-310001126328us-gaap:CollateralizedDebtObligationsMember2020-12-310001126328pfg:PrincipalInternationalChileMembersrt:MaximumMemberpfg:UnsecuredLineOfCreditMember2021-01-012022-12-310001126328pfg:Delaware2048TrustMemberpfg:SeniorNotesDue2048Memberpfg:ContingentFundingAgreement30YearMember2018-03-080001126328pfg:Delaware2028TrustMemberpfg:SeniorNotesDue2028Memberpfg:ContingentFundingAgreement10YearMember2018-03-080001126328pfg:NotesPayable2.125PercentDue2030Memberus-gaap:SeniorNotesMember2020-08-030001126328pfg:NotesPayable2.125PercentDue2030Memberus-gaap:SeniorNotesMember2020-06-120001126328pfg:NotesPayable3.7PercentDue2029Memberus-gaap:SeniorNotesMember2019-05-070001126328pfg:NotesPayable4.3PercentDue2046Memberus-gaap:SeniorNotesMember2016-11-100001126328pfg:NotesPayable3.1PercentDue2026Memberus-gaap:SeniorNotesMember2016-11-100001126328pfg:NotesPayable3.1PercentDue2026AndNotesPayable4.3PercentDue2046Memberus-gaap:SeniorNotesMember2016-11-100001126328pfg:NotesPayable4.7PercentDue2055Memberus-gaap:JuniorSubordinatedDebtMember2015-05-070001126328pfg:NotesPayable3.4PercentDue2025Memberus-gaap:SeniorNotesMember2015-05-070001126328pfg:NotesPayable4.35PercentDue2043Memberus-gaap:SeniorNotesMember2012-11-160001126328pfg:NotesPayable3.125PercentDue2023Memberus-gaap:SeniorNotesMember2012-11-160001126328pfg:NotesPayable1.85PercentDue2017Memberus-gaap:SeniorNotesMember2012-11-160001126328pfg:NotesPayable1.85PercentDue2017And3.125PercentDue2023And4.35PercentDue2043Memberus-gaap:SeniorNotesMember2012-11-160001126328pfg:NotesPayable4.625PercentDue2042Memberus-gaap:SeniorNotesMember2012-09-050001126328pfg:NotesPayable3.3PercentDue2022Memberus-gaap:SeniorNotesMember2012-09-050001126328pfg:NotesPayable3.3PercentDue2022And4.625PercentDue2042Memberus-gaap:SeniorNotesMember2012-09-050001126328pfg:NotesPayable6.05PercentDue2036IssuedDecember2006Memberus-gaap:SeniorNotesMember2006-12-050001126328pfg:NotesPayable6.05PercentDue2036IssuedOctober2006Memberus-gaap:SeniorNotesMember2006-10-160001126328pfg:NotesPayableFloatingRateDue2055Member2022-12-310001126328pfg:NotesPayable6.05PercentDue2036Member2022-12-310001126328pfg:NotesPayable4.625PercentDue2042Member2022-12-310001126328pfg:NotesPayable4.3PercentDue2046Member2022-12-310001126328pfg:NotesPayable4.35PercentDue2043Member2022-12-310001126328pfg:NotesPayable3.7PercentDue2029Member2022-12-310001126328pfg:NotesPayable3.4PercentDue2025Member2022-12-310001126328pfg:NotesPayable3.1PercentDue2026Member2022-12-310001126328pfg:NotesPayable3.125PercentDue2023Member2022-12-310001126328pfg:NotesPayable2.125PercentDue2030Member2022-12-310001126328pfg:NotesPayableFloatingRateDue2055Member2021-12-310001126328pfg:NotesPayable6.05PercentDue2036Member2021-12-310001126328pfg:NotesPayable4.625PercentDue2042Member2021-12-310001126328pfg:NotesPayable4.3PercentDue2046Member2021-12-310001126328pfg:NotesPayable4.35PercentDue2043Member2021-12-310001126328pfg:NotesPayable3.7PercentDue2029Member2021-12-310001126328pfg:NotesPayable3.4PercentDue2025Member2021-12-310001126328pfg:NotesPayable3.3PercentDue2022Member2021-12-310001126328pfg:NotesPayable3.1PercentDue2026Member2021-12-310001126328pfg:NotesPayable3.125PercentDue2023Member2021-12-310001126328pfg:NotesPayable2.125PercentDue2030Member2021-12-310001126328pfg:NotesPayable4.7PercentDue2055Memberus-gaap:JuniorSubordinatedDebtMember2015-05-072015-05-070001126328pfg:FiveLargestCededReinsurersMemberpfg:NetCededReinsuranceRecoverablesMemberus-gaap:ReinsurerConcentrationRiskMember2022-01-012022-12-310001126328pfg:FiveLargestCededReinsurersMemberpfg:NetCededReinsuranceRecoverablesMemberus-gaap:ReinsurerConcentrationRiskMember2021-01-012021-12-310001126328us-gaap:CommonStockMember2022-01-012022-12-310001126328us-gaap:CommonStockMember2021-01-012021-12-310001126328us-gaap:CommonStockMember2020-01-012020-12-310001126328us-gaap:AccidentAndHealthInsuranceSegmentMember2022-01-012022-12-310001126328us-gaap:AccidentAndHealthInsuranceSegmentMember2021-01-012021-12-310001126328us-gaap:AccidentAndHealthInsuranceSegmentMember2020-01-012020-12-310001126328srt:ParentCompanyMembersrt:ReportableLegalEntitiesMember2020-12-310001126328srt:ParentCompanyMembersrt:ReportableLegalEntitiesMember2019-12-310001126328us-gaap:USTreasuryAndGovernmentMember2022-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001126328us-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:OtherDebtSecuritiesMember2022-12-310001126328us-gaap:ForeignGovernmentDebtSecuritiesMember2022-12-310001126328us-gaap:CorporateDebtSecuritiesMember2022-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:CollateralizedDebtObligationsMember2022-12-310001126328us-gaap: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:LifeAndAnnuityInsuranceProductLineMember2022-01-012022-12-310001126328us-gaap:LifeAndAnnuityInsuranceProductLineMember2021-01-012021-12-310001126328us-gaap:LifeAndAnnuityInsuranceProductLineMember2020-01-012020-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2022-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2021-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:OtherDebtSecuritiesMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:TradingSecuritiesMemberus-gaap:CollateralizedDebtObligationsMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:OtherDebtSecuritiesMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:CollateralizedDebtObligationsMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:EquitySecuritiesMember2022-12-310001126328us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesMember2022-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiarySponsoredInvestmentFundsMember2022-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryResidentialMortgageLoansMember2022-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryRealEstateMember2022-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryMandatoryRetirementSavingsMember2022-12-310001126328pfg:SegmentPrincipalGlobalInvestorsMember2022-12-310001126328us-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:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:OtherDebtSecuritiesMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:CorporateDebtSecuritiesMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:CommercialMortgageBackedSecuritiesMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:AvailableForSaleSecurityMemberus-gaap:CollateralizedDebtObligationsMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap:EquitySecuritiesMember2021-12-310001126328us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesMember2021-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiarySponsoredInvestmentFundsMember2021-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryResidentialMortgageLoansMember2021-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryRealEstateMember2021-12-310001126328pfg:VariableInterestEntityPrimaryBeneficiaryMandatoryRetirementSavingsMember2021-12-310001126328pfg:SegmentPrincipalGlobalInvestorsMember2021-12-310001126328us-gaap:PensionPlansDefinedBenefitMember2021-01-012021-12-310001126328pfg:August2022AcceleratedShareRepurchaseProgramMemberus-gaap:CommonStockMember2022-08-160001126328pfg:AcceleratedShareRepurchaseProgramMarch2022Memberus-gaap:CommonStockMember2022-03-310001126328srt:MaximumMemberus-gaap:JuniorSubordinatedDebtMember2015-05-072015-05-070001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:OtherLimitedPartnershipAndFundInterestsMember2022-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMemberpfg:OtherLimitedPartnershipAndFundInterestsMember2021-12-310001126328us-gaap:CommonStockMember2022-01-012022-01-310001126328us-gaap:CommonStockMember2021-06-012021-06-300001126328us-gaap:CommonStockMember2020-02-012020-02-290001126328us-gaap:CommonStockMember2018-11-012018-11-300001126328pfg:ContingentFundingAgreementMember2018-03-080001126328us-gaap:RetainedEarningsMember2022-01-012022-12-310001126328us-gaap:RetainedEarningsMember2021-01-012021-12-310001126328us-gaap:RetainedEarningsMember2020-01-012020-12-310001126328pfg:StockBasedCompensationPlansMember2022-01-012022-12-310001126328pfg:StockBasedCompensationPlansMember2021-01-012021-12-310001126328pfg:StockBasedCompensationPlansMember2020-01-012020-12-310001126328pfg:StockBasedCompensationDirectorsStockPlanStockIncentivePlanAmendedAndRestatedStockIncentivePlanDirectorsStockPlanMember2022-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-12-310001126328srt:WeightedAverageMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:MinimumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputLongTermRevenueGrowthRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:MeasurementInputDiscountRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputTerminalCapitalizationRateMemberpfg:DiscountedCashFlowRealEstateMember2022-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputMarketInterestRateMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-12-310001126328srt:MaximumMemberpfg:SeparateAccountAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberpfg:MeasurementInputLoanToValueRatioMemberpfg:DiscountedCashFlowRealEstateDebtMember2022-12-310001126328srt: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:DiscountedCashFlowMortgageLoansMember2021-12-310001126328pfg:LongTermDisabilityGroupLifeWaiverMember2022-12-310001126328pfg:GroupLifeMember2022-12-310001126328pfg:Delaware2048TrustMember2018-03-082018-03-080001126328pfg:Delaware2028TrustMember2018-03-082018-03-080001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2022-01-012022-12-310001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2021-01-012021-12-310001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2020-01-012020-12-310001126328srt:ParentCompanyMembersrt:ReportableLegalEntitiesMemberus-gaap:NonqualifiedPlanMember2022-12-310001126328srt:ParentCompanyMembersrt:ReportableLegalEntitiesMemberus-gaap:NonqualifiedPlanMember2021-12-310001126328us-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMemberpfg:NetInvestmentIncomeLossMember2022-01-012022-12-310001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberpfg:BenefitsClaimsAndSettlementExpensesMember2022-01-012022-12-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2022-01-012022-12-310001126328us-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMemberpfg:NetInvestmentIncomeLossMember2021-01-012021-12-310001126328us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMemberpfg:BenefitsClaimsAndSettlementExpensesMember2021-01-012021-12-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2021-01-012021-12-310001126328us-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMemberpfg:NetInvestmentIncomeLossMember2020-01-012020-12-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMemberpfg:NetInvestmentIncomeLossMember2020-01-012020-12-310001126328pfg:Delaware2028TrustMemberpfg:ContingentFundingAgreement10YearMember2018-03-082018-03-080001126328srt:RetailSiteMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328srt:OtherPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328srt:OfficeBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328srt:IndustrialPropertyMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328srt:HotelMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328srt:ApartmentBuildingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:WestSouthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:WestNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:SouthAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:PacificMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:NewEnglandMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:MountainMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:MiddleAtlanticMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:InternationalMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:EastSouthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328pfg:EastNorthCentralMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328srt: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:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:Delaware2048TrustMemberpfg:ContingentFundingAgreement30YearMember2018-03-082018-03-080001126328pfg:SubsegmentIndividualLifeInsuranceMember2022-12-310001126328pfg:SubsegmentIndividualLifeInsuranceMember2021-12-310001126328pfg:SubsegmentIndividualLifeInsuranceMember2020-12-310001126328srt: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:AccumulatedOtherComprehensiveIncomeMember2021-01-012021-12-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-01-012020-12-310001126328srt:ParentCompanyMembersrt:ReportableLegalEntitiesMember2022-12-310001126328srt:ParentCompanyMembersrt:ReportableLegalEntitiesMember2021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentEliminationsMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentEliminationsMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentEliminationsMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMember2020-01-012020-12-310001126328pfg:FiveLargestCededReinsurersMemberpfg:NetCededReinsuranceRecoverablesMemberus-gaap:ReinsurerConcentrationRiskMember2022-12-310001126328pfg:FiveLargestCededReinsurersMemberpfg:NetCededReinsuranceRecoverablesMemberus-gaap:ReinsurerConcentrationRiskMember2021-12-310001126328pfg:ContingentFundingAgreementMember2018-03-082018-03-080001126328pfg:MortgagesAndNotesPayableMemberus-gaap:NonrecourseMember2022-12-310001126328pfg:MortgagesAndNotesPayableMemberus-gaap:NonrecourseMember2021-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310001126328us-gaap:RestrictedStockUnitsRSUMember2022-01-012022-12-310001126328us-gaap:PerformanceSharesMember2022-01-012022-12-310001126328us-gaap:RestrictedStockUnitsRSUMember2021-01-012021-12-310001126328us-gaap:PerformanceSharesMember2021-01-012021-12-310001126328us-gaap:RestrictedStockUnitsRSUMember2020-01-012020-12-310001126328us-gaap:PerformanceSharesMember2020-01-012020-12-310001126328pfg:SegmentRetirementAndIncomeSolutionsMember2022-01-012022-12-310001126328pfg:SegmentPrincipalGlobalInvestorsMember2022-01-012022-12-310001126328pfg:SegmentRetirementAndIncomeSolutionsMember2021-01-012021-12-310001126328pfg:SegmentPrincipalGlobalInvestorsMember2021-01-012021-12-310001126328pfg:SegmentRetirementAndIncomeSolutionsMember2020-01-012020-12-310001126328pfg:SegmentPrincipalGlobalInvestorsMember2020-01-012020-12-310001126328us-gaap:InterestRateSwapMember2022-01-012022-12-3100011263282019-01-012019-12-310001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMember2022-12-310001126328pfg:FixedMaturitiesSecuritiesAvailableForSaleMember2021-12-310001126328pfg:TalcottLifeAndAnnuityReMemberpfg:AssetsCashAndCashEquivalentsMember2022-01-012022-12-310001126328pfg:TradingSecuritiesMemberus-gaap:DebtSecuritiesMember2022-01-012022-12-310001126328pfg:AvailableForSaleSecurityMemberus-gaap:DebtSecuritiesMember2022-01-012022-12-310001126328us-gaap:PolicyLoansMember2022-01-012022-12-310001126328us-gaap:EquitySecuritiesMember2022-01-012022-12-310001126328us-gaap:DerivativeMember2022-01-012022-12-310001126328us-gaap:CashAndCashEquivalentsMember2022-01-012022-12-310001126328pfg:OtherInvestmentTypesMember2022-01-012022-12-310001126328pfg:MortgageLoansMember2022-01-012022-12-310001126328pfg:InvestmentsInRealEstateMember2022-01-012022-12-310001126328pfg:TradingSecuritiesMemberus-gaap:DebtSecuritiesMember2021-01-012021-12-310001126328pfg:AvailableForSaleSecurityMemberus-gaap:DebtSecuritiesMember2021-01-012021-12-310001126328us-gaap:PolicyLoansMember2021-01-012021-12-310001126328us-gaap:EquitySecuritiesMember2021-01-012021-12-310001126328us-gaap:DerivativeMember2021-01-012021-12-310001126328us-gaap:CashAndCashEquivalentsMember2021-01-012021-12-310001126328pfg:OtherInvestmentTypesMember2021-01-012021-12-310001126328pfg:MortgageLoansMember2021-01-012021-12-310001126328pfg:InvestmentsInRealEstateMember2021-01-012021-12-310001126328pfg:TradingSecuritiesMemberus-gaap:DebtSecuritiesMember2020-01-012020-12-310001126328pfg:AvailableForSaleSecurityMemberus-gaap:DebtSecuritiesMember2020-01-012020-12-310001126328us-gaap:PolicyLoansMember2020-01-012020-12-310001126328us-gaap:EquitySecuritiesMember2020-01-012020-12-310001126328us-gaap:DerivativeMember2020-01-012020-12-310001126328us-gaap:CashAndCashEquivalentsMember2020-01-012020-12-310001126328pfg:OtherInvestmentTypesMember2020-01-012020-12-310001126328pfg:MortgageLoansMember2020-01-012020-12-310001126328pfg:InvestmentsInRealEstateMember2020-01-012020-12-310001126328pfg:NetOtherAssetsAndLiabilitiesMember2022-12-310001126328pfg:TalcottLifeAndAnnuityReMemberus-gaap:OtherInvestmentsMember2022-01-012022-12-310001126328pfg:TalcottLifeAndAnnuityReMemberus-gaap:EquitySecuritiesMember2022-01-012022-12-310001126328pfg:TalcottLifeAndAnnuityReMemberus-gaap:DerivativeMember2022-01-012022-12-310001126328pfg:TalcottLifeAndAnnuityReMemberpfg:MortgageLoansMember2022-01-012022-12-310001126328pfg:TalcottLifeAndAnnuityReMemberpfg:FixedMaturitiesTradingMember2022-01-012022-12-310001126328pfg:TalcottLifeAndAnnuityReMemberpfg:FixedMaturitiesSecuritiesAvailableForSaleMember2022-01-012022-12-310001126328pfg:TalcottLifeAndAnnuityReMember2022-01-012022-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMember2022-01-012022-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:FundingAgreement2011ProgramMember2011-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:FundingAgreement2001ProgramMember2001-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:FundingAgreement1998ProgramMember1998-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:FundingAgreement2011ProgramMember2021-02-280001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:FundingAgreement2011ProgramMember2017-11-300001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:FundingAgreement2011ProgramMember2015-06-300001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:FundingAgreementsFederalHomeLoanBankDesMoinesMember2022-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:FundingAgreement2011ProgramMember2022-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:FundingAgreement2001ProgramMember2022-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:FundingAgreement1998ProgramMember2022-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:FundingAgreementsFederalHomeLoanBankDesMoinesMember2021-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:FundingAgreement2011ProgramMember2021-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:FundingAgreement2001ProgramMember2021-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberpfg:FundingAgreement1998ProgramMember2021-12-310001126328srt:MaximumMember2022-12-310001126328us-gaap:AssetPledgedAsCollateralMember2022-12-310001126328us-gaap:AssetPledgedAsCollateralMember2021-12-310001126328us-gaap:OtherIntangibleAssetsMember2022-01-012022-12-310001126328us-gaap:OtherIntangibleAssetsMember2021-01-012021-12-310001126328pfg:StandardPoorsBPlusAndBelowRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:StandardPoorsBBPlusThruBBMinusRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:StandardPoorsBBBPlusThruBBBMinusRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:StandardPoorsAMinusAndAboveRatingMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328pfg:PerformingMemberus-gaap:ResidentialMortgageMember2021-12-310001126328pfg:NonperformingMemberus-gaap:ResidentialMortgageMember2021-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001126328us-gaap:ResidentialMortgageMember2020-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2020-12-310001126328us-gaap:ResidentialMortgageMember2022-12-310001126328us-gaap:ResidentialMortgageMember2021-12-310001126328us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001126328us-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001126328us-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001126328us-gaap:FinancialAssetPastDueMember2022-12-310001126328us-gaap:FinancialAssetNotPastDueMember2022-12-310001126328us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001126328us-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001126328us-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001126328us-gaap:FinancialAssetPastDueMember2021-12-310001126328us-gaap:FinancialAssetNotPastDueMember2021-12-3100011263282019-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentSpecialtyBenefitsInsuranceMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalInternationalMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalGlobalInvestorsMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentCorporateMember2022-01-012022-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentSpecialtyBenefitsInsuranceMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalInternationalMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalGlobalInvestorsMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentCorporateMember2021-01-012021-12-310001126328us-gaap:MaterialReconcilingItemsMember2021-01-012021-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentSpecialtyBenefitsInsuranceMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentUSInsuranceSolutionsMemberpfg:SubsegmentIndividualLifeInsuranceMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsSpreadMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentRetirementAndIncomeSolutionsMemberpfg:SubsegmentRetirementAndIncomeSolutionsFeeMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalInternationalMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentPrincipalGlobalInvestorsMember2020-01-012020-12-310001126328us-gaap:OperatingSegmentsMemberpfg:SegmentCorporateMember2020-01-012020-12-310001126328us-gaap:MaterialReconcilingItemsMember2020-01-012020-12-310001126328us-gaap:DerivativeFinancialInstrumentsAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2022-01-012022-12-310001126328us-gaap:DerivativeFinancialInstrumentsAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2020-01-012020-12-310001126328us-gaap:FairValueMeasurementsRecurringMember2021-01-012021-12-310001126328us-gaap:FairValueMeasurementsRecurringMember2020-01-012020-12-310001126328us-gaap:FairValueMeasurementsRecurringMember2022-01-012022-12-310001126328pfg:FundsWithheldPayableEmbeddedDerivativeMemberus-gaap:FairValueMeasurementsRecurringMember2022-01-012022-12-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2022-01-012022-12-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2021-01-012021-12-310001126328pfg:InvestmentAndUniversalLifeContractsMemberus-gaap:FairValueMeasurementsRecurringMember2020-01-012020-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2022-01-012022-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-01-012021-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-01-012021-12-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2021-01-012021-12-310001126328pfg:SeparateAccountAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2020-01-012020-12-310001126328pfg:InvestmentsOtherMemberus-gaap:FairValueMeasurementsRecurringMember2020-01-012020-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-01-012022-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-01-012022-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-01-012022-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2020-01-012020-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2020-01-012020-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-01-012022-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:TradingSecuritiesMember2022-01-012022-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-01-012022-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2022-01-012022-12-310001126328us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-01-012021-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-01-012021-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-01-012021-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-01-012021-12-310001126328us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2021-01-012021-12-310001126328us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2020-01-012020-12-310001126328us-gaap:DebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2020-01-012020-12-310001126328us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2020-01-012020-12-310001126328us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberpfg:AvailableForSaleSecurityMember2020-01-012020-12-310001126328us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesMember2022-01-012022-12-310001126328us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesMember2021-01-012021-12-310001126328us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesMember2020-01-012020-12-310001126328pfg:EmployeeStockPurchasePlanMember2022-12-310001126328srt:ParentCompanyMembersrt:ReportableLegalEntitiesMember2022-01-012022-12-310001126328srt:ParentCompanyMembersrt:ReportableLegalEntitiesMember2021-01-012021-12-310001126328srt:ParentCompanyMembersrt:ReportableLegalEntitiesMember2020-01-012020-12-310001126328pfg:SubsidiariesPrincipalLifeInsuranceCompanyMember2022-01-012022-12-310001126328pfg:StandardPoorsBBPlusThruBBMinusRatingMember2021-12-310001126328pfg:StandardPoorsBBBPlusThruBBBMinusRatingMember2021-12-310001126328pfg:StandardPoorsAMinusAndAboveRatingMember2021-12-310001126328us-gaap:OtherContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-12-310001126328us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-12-310001126328us-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2022-12-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-12-310001126328us-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2022-12-310001126328us-gaap:EquityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-12-310001126328us-gaap:CreditRiskContractMemberus-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-12-310001126328us-gaap:NotDesignatedAsHedgingInstrumentEconomicHedgeMember2022-12-310001126328us-gaap:DesignatedAsHedgingInstrumentMember2022-12-310001126328us-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:FairValueMeasurementsRecurringMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328us-gaap:FairValueMeasurementsRecurringMember2022-12-310001126328us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328us-gaap:FairValueMeasurementsRecurringMember2021-12-310001126328us-gaap:StockOptionMember2022-12-310001126328us-gaap:InterestRateSwapMember2022-12-310001126328us-gaap:ForeignExchangeForwardMember2022-12-310001126328us-gaap:CurrencySwapMember2022-12-310001126328us-gaap:CreditDefaultSwapMember2022-12-310001126328pfg:InterestRateOptionsMember2022-12-310001126328pfg:InterestRateForwardsMember2022-12-310001126328us-gaap:StockOptionMember2021-12-310001126328us-gaap:InterestRateSwapMember2021-12-310001126328us-gaap:ForeignExchangeForwardMember2021-12-310001126328us-gaap:CurrencySwapMember2021-12-310001126328us-gaap:CreditDefaultSwapMember2021-12-310001126328pfg:InterestRateOptionsMember2021-12-310001126328pfg:InterestRateForwardsMember2021-12-310001126328us-gaap:QualifiedPlanMemberpfg:DefinedContributionPlanGrandfatheredChoiceParticipantMember2022-01-012022-12-310001126328us-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-01-012022-12-310001126328us-gaap:NonqualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2022-01-012022-12-310001126328us-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-01-012021-12-310001126328us-gaap:NonqualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-01-012021-12-310001126328us-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2020-01-012020-12-310001126328us-gaap:NonqualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2020-01-012020-12-310001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-01-012022-12-310001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-01-012021-12-310001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-01-010001126328us-gaap:PensionPlansDefinedBenefitMember2022-12-310001126328us-gaap:PensionPlansDefinedBenefitMember2021-12-310001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-12-310001126328us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310001126328us-gaap:PensionPlansDefinedBenefitMember2022-01-012022-12-310001126328pfg:LongTermCarePlansMember2020-04-012020-06-300001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2022-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:MortgageBackedSecuritiesMember2022-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:CommercialMortgageBackedSecuritiesMember2022-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:USTreasuryAndGovernmentMember2021-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:CorporateDebtSecuritiesMember2021-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:CommercialMortgageBackedSecuritiesMember2021-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMemberus-gaap:CollateralizedDebtObligationsMember2021-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMember2022-12-310001126328pfg:PrincipalLifeInsuranceCompanyConsolidatedMember2021-12-310001126328us-gaap:CorporateDebtSecuritiesMember2022-01-012022-12-310001126328us-gaap:CorporateDebtSecuritiesMember2021-01-012021-12-310001126328us-gaap:CorporateDebtSecuritiesMember2020-01-012020-12-310001126328srt:MinimumMemberpfg:MortgagesAndNotesPayableMemberus-gaap:NonrecourseMember2022-12-310001126328srt:MaximumMemberpfg:MortgagesAndNotesPayableMemberus-gaap:NonrecourseMember2022-12-310001126328srt:MinimumMemberpfg:MortgagesAndNotesPayableMemberus-gaap:NonrecourseMember2021-12-310001126328srt:MaximumMemberpfg:MortgagesAndNotesPayableMemberus-gaap:NonrecourseMember2021-12-310001126328us-gaap:ResidentialMortgageMember2022-01-012022-12-310001126328us-gaap:CommercialRealEstatePortfolioSegmentMember2022-01-012022-12-310001126328pfg:NonperformingMemberus-gaap:ResidentialMortgageMember2022-01-012022-12-310001126328srt:StandardPoorsBBRatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2022-01-012022-12-310001126328srt:StandardPoorsBBBRatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2022-01-012022-12-310001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:SovereignDebtMember2022-01-012022-12-310001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2022-01-012022-12-310001126328us-gaap:CreditDefaultSwapMember2022-01-012022-12-310001126328srt:StandardPoorsBBBRatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2021-01-012021-12-310001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:SovereignDebtMember2021-01-012021-12-310001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2021-01-012021-12-310001126328us-gaap:CreditDefaultSwapMember2021-01-012021-12-310001126328srt:StandardPoorsBBRatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001126328srt:StandardPoorsBBBRatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:SovereignDebtMember2022-12-310001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2022-12-310001126328us-gaap:CreditDefaultSwapMember2022-12-310001126328srt:StandardPoorsBBBRatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2021-12-310001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:SovereignDebtMember2021-12-310001126328srt:StandardPoorsARatingMemberpfg:SingleNameCreditDefaultSwapsMemberus-gaap:CorporateDebtSecuritiesMember2021-12-310001126328us-gaap:CreditDefaultSwapMember2021-12-310001126328us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2022-12-310001126328us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2021-12-310001126328pfg:SegmentUSInsuranceSolutionsMember2022-12-310001126328pfg:SegmentRetirementAndIncomeSolutionsMember2022-12-310001126328pfg:SegmentPrincipalInternationalMember2022-12-310001126328pfg:SegmentCorporateMember2022-12-310001126328pfg:SegmentUSInsuranceSolutionsMember2021-12-310001126328pfg:SegmentRetirementAndIncomeSolutionsMember2021-12-310001126328pfg:SegmentPrincipalInternationalMember2021-12-310001126328pfg:SegmentCorporateMember2021-12-310001126328us-gaap:DerivativeFinancialInstrumentsAssetsMember2022-12-310001126328pfg:ReverseRepurchaseAgreementMember2022-12-310001126328us-gaap:DerivativeFinancialInstrumentsAssetsMember2021-12-310001126328pfg:ReverseRepurchaseAgreementMember2021-12-310001126328us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2022-12-310001126328us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2021-12-3100011263282020-12-310001126328pfg:ReclassificationActuarialBalanceRecohortingUlsgBusinessMember2022-01-012022-12-310001126328pfg:EmployeeStockPurchasePlanMember2022-01-012022-12-310001126328pfg:EmployeeStockPurchasePlanMember2021-01-012021-12-310001126328pfg:EmployeeStockPurchasePlanMember2020-01-012020-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2022-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2022-12-310001126328us-gaap:EstimateOfFairValueFairValueDisclosureMember2022-12-310001126328us-gaap:CarryingReportedAmountFairValueDisclosureMember2022-12-310001126328us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310001126328us-gaap:FairValueInputsLevel1Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310001126328us-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310001126328us-gaap:CarryingReportedAmountFairValueDisclosureMember2021-12-310001126328us-gaap:CommercialPaperMember2022-12-310001126328us-gaap:CommercialPaperMember2021-12-310001126328us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember2022-12-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-12-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-12-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-12-310001126328us-gaap:OperatingSegmentsMember2022-01-012022-12-310001126328us-gaap:MaterialReconcilingItemsMember2022-01-012022-12-310001126328us-gaap:NoncontrollingInterestMember2022-01-012022-12-310001126328us-gaap:AdditionalPaidInCapitalMember2022-01-012022-12-310001126328us-gaap:NoncontrollingInterestMember2021-01-012021-12-310001126328us-gaap:AdditionalPaidInCapitalMember2021-01-012021-12-3100011263282021-01-012021-12-310001126328us-gaap:NoncontrollingInterestMember2020-01-012020-12-310001126328us-gaap:AdditionalPaidInCapitalMember2020-01-012020-12-3100011263282020-01-012020-12-310001126328us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-01-012022-12-310001126328us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-01-012022-12-310001126328us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-01-012022-12-310001126328us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2022-01-012022-12-310001126328us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2022-01-012022-12-310001126328us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2021-01-012021-12-310001126328us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2021-01-012021-12-310001126328us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2020-01-012020-12-310001126328us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2020-01-012020-12-3100011263282022-12-3100011263282021-12-310001126328pfg:August2022AcceleratedShareRepurchaseProgramMemberus-gaap:CommonStockMember2022-09-012022-09-300001126328pfg:August2022AcceleratedShareRepurchaseProgramMemberus-gaap:CommonStockMember2022-08-012022-08-310001126328pfg:AcceleratedShareRepurchaseProgramMarch2022Memberus-gaap:CommonStockMember2022-06-012022-06-300001126328pfg:AcceleratedShareRepurchaseProgramMarch2022Memberus-gaap:CommonStockMember2022-03-012022-03-3100011263282022-06-3000011263282023-01-3000011263282022-01-012022-12-31xbrli:sharesiso4217:USDxbrli:pureiso4217:USDxbrli:sharespfg:itempfg:securitypfg:contractpfg:claim

Table of Contents

​

​

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K