2.4.0.84060 - Disclosure - Derivative Financial Instruments (Details 5)truefalseIn Millions, unless otherwise specifiedfalse1false USDfalsefalse$D2013Q2http://www.sec.gov/CIK0001126328duration2013-04-01T00:00:002013-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$D2012Q2http://www.sec.gov/CIK0001126328duration2012-04-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalse$D2013Q2YTDhttp://www.sec.gov/CIK0001126328duration2013-01-01T00:00:002013-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDfalsefalse$D2012Q2YTDhttp://www.sec.gov/CIK0001126328duration2012-01-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3pfg_EffectOfFairValueHedgesOnResultsOfOperationsLineItemspfg_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Effect of derivatives in fair value hedging relationships and the related hedged items on the consolidated statements of operations2false 4us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstrumentsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse5590000055.9USD$falsetruefalse2truefalsefalse-45900000-45.9USD$falsetruefalse3truefalsefalse2350000023.5USD$falsetruefalse4truefalsefalse12000001.2USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe amount recognized in earnings related to the change in fair value during the period of derivative or nonderivative instruments designated as fair value hedging instruments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Amount of gain (loss) recognized in net income on derivatives3false 4us-gaap_ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedgeus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-52700000-52.7USD$falsefalsefalse2truefalsefalse4400000044.0USD$falsefalsefalse3truefalsefalse-18900000-18.9USD$falsefalsefalse4truefalsefalse23000002.3USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount recognized in earnings related to the change in fair value during the period of the hedged item in a fair value hedge.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 false2Amount of gain (loss) recognized in net income on related hedged item4false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5false USDtruefalse$D2013Q2_FairValueHedgingMemberhttp://www.sec.gov/CIK0001126328duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseFair Value Hedgesus-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueHedgingMemberus-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Fair Value Hedges5true 3pfg_EffectOfFairValueHedgesOnResultsOfOperationsLineItemspfg_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Effect of derivatives in fair value hedging relationships and the related hedged items on the consolidated statements of operations6false 4pfg_PeriodicSettlementsDerivativesHedgingFixedMaturitiesAvailableForSaleFairValueHedgepfg_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-29700000-29.7USD$falsefalsefalse2truefalsefalse-33600000-33.6USD$falsefalsefalse3truefalsefalse-61200000-61.2USD$falsefalsefalse4truefalsefalse-69100000-69.1USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of the periodic settlements recognized in net investment income on interest rate contracts and foreign exchange contracts in fair value hedging relationships of fixed maturities, available-for-sale.No definition available.false2Gain (loss) on periodic settlements on interest rate and foreign exchange contracts in fair value hedge of fixed maturities, available-for-sale reported in net investment income7false 4pfg_PeriodicSettlementsDerivativesHedgingInvestmentTypeInsuranceContractFairValueHedgeGainpfg_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1000000010.0USD$falsefalsefalse2truefalsefalse91000009.1USD$falsefalsefalse3truefalsefalse1930000019.3USD$falsefalsefalse4truefalsefalse1790000017.9USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of the periodic settlements recognized in benefits, claims and settlement expenses on interest rate contracts and foreign exchange contracts in fair value hedging relationships of investment-type insurance contracts.No definition available.false2Gain (loss) on periodic settlements on interest rate and foreign exchange contracts in fair value hedge of investment-type insurance contracts reported in benefits, claims and settlement expenses8false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse9false USDtruefalse$D2013Q2_FixedMaturitiesSecuritiesAvailableForSaleMember_InterestRateContractMember_FairValueHedgingMemberhttp://www.sec.gov/CIK0001126328duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseFair Value Hedgesus-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueHedgingMemberus-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxisexplicitMemberfalsefalseInterest rate contractsus-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_InterestRateContractMemberus-gaap_DerivativeByNatureAxisexplicitMemberfalsefalseFixed maturities, available-for-salepfg_SummaryOfHedgesByBalanceSheetLocationAxisxbrldihttp://xbrl.org/2006/xbrldipfg_FixedMaturitiesSecuritiesAvailableForSaleMemberpfg_SummaryOfHedgesByBalanceSheetLocationAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Fair Value Hedges | Interest rate contracts | Fixed maturities, available-for-sale9true 3pfg_EffectOfFairValueHedgesOnResultsOfOperationsLineItemspfg_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Effect of derivatives in fair value hedging relationships and the related hedged items on the consolidated statements of operations10false 4us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstrumentsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse6590000065.9USD$falsefalsefalse2truefalsefalse-25100000-25.1USD$falsefalsefalse3truefalsefalse9630000096.3USD$falsefalsefalse4truefalsefalse66000006.6USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount recognized in earnings related to the change in fair value during the period of derivative or nonderivative instruments designated as fair value hedging instruments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Amount of gain (loss) recognized in net income on derivatives11false 4us-gaap_ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedgeus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-62700000-62.7USD$falsefalsefalse2truefalsefalse2430000024.3USD$falsefalsefalse3truefalsefalse-91300000-91.3USD$falsefalsefalse4truefalsefalse-3900000-3.9USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount recognized in earnings related to the change in fair value during the period of the hedged item in a fair value hedge.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 false2Amount of gain (loss) recognized in net income on related hedged item12false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse13false USDtruefalse$D2013Q2_FixedMaturitiesSecuritiesAvailableForSaleMember_ForeignExchangeContractMember_FairValueHedgingMemberhttp://www.sec.gov/CIK0001126328duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseFair Value Hedgesus-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueHedgingMemberus-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxisexplicitMemberfalsefalseForeign exchange contractsus-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignExchangeContractMemberus-gaap_DerivativeByNatureAxisexplicitMemberfalsefalseFixed maturities, available-for-salepfg_SummaryOfHedgesByBalanceSheetLocationAxisxbrldihttp://xbrl.org/2006/xbrldipfg_FixedMaturitiesSecuritiesAvailableForSaleMemberpfg_SummaryOfHedgesByBalanceSheetLocationAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Fair Value Hedges | Foreign exchange contracts | Fixed maturities, available-for-sale13true 3pfg_EffectOfFairValueHedgesOnResultsOfOperationsLineItemspfg_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Effect of derivatives in fair value hedging relationships and the related hedged items on the consolidated statements of operations14false 4us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstrumentsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse24000002.4USD$falsefalsefalse3truefalsefalse13000001.3USD$falsefalsefalse4truefalsefalse16000001.6USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount recognized in earnings related to the change in fair value during the period of derivative or nonderivative instruments designated as fair value hedging instruments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Amount of gain (loss) recognized in net income on derivatives15false 4us-gaap_ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedgeus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1000000.1USD$falsefalsefalse2truefalsefalse-2400000-2.4USD$falsefalsefalse3truefalsefalse-1200000-1.2USD$falsefalsefalse4truefalsefalse-1100000-1.1USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount recognized in earnings related to the change in fair value during the period of the hedged item in a fair value hedge.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 false2Amount of gain (loss) recognized in net income on related hedged item16false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse17false USDtruefalse$D2013Q2_InvestmentTypeInsuranceContractsMember_ForeignExchangeContractMember_FairValueHedgingMemberhttp://www.sec.gov/CIK0001126328duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseFair Value Hedgesus-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueHedgingMemberus-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxisexplicitMemberfalsefalseForeign exchange contractsus-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignExchangeContractMemberus-gaap_DerivativeByNatureAxisexplicitMemberfalsefalseInvestment-type insurance contractspfg_SummaryOfHedgesByBalanceSheetLocationAxisxbrldihttp://xbrl.org/2006/xbrldipfg_InvestmentTypeInsuranceContractsMemberpfg_SummaryOfHedgesByBalanceSheetLocationAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Fair Value Hedges | Foreign exchange contracts | Investment-type insurance contracts17true 3pfg_EffectOfFairValueHedgesOnResultsOfOperationsLineItemspfg_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Effect of derivatives in fair value hedging relationships and the related hedged items on the consolidated statements of operations18false 4us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstrumentsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-10000000-10.0USD$falsefalsefalse2truefalsefalse-23200000-23.2USD$falsefalsefalse3truefalsefalse-74100000-74.1USD$falsefalsefalse4truefalsefalse-7000000-7.0USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount recognized in earnings related to the change in fair value during the period of derivative or nonderivative instruments designated as fair value hedging instruments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Amount of gain (loss) recognized in net income on derivatives19false 4us-gaap_ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedgeus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse99000009.9USD$falsetruefalse2truefalsefalse2210000022.1USD$falsetruefalse3truefalsefalse7360000073.6USD$falsetruefalse4truefalsefalse73000007.3USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe amount recognized in earnings related to the change in fair value during the period of the hedged item in a fair value hedge.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 false2Amount of gain (loss) recognized in net income on related hedged itemfalseDerivative Financial Instruments (Details 5) (USD $)HundredThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://principal.com/role/DisclosureDerivativeFinancialInstrumentsDetails5419