2.4.0.84062 - Disclosure - Derivative Financial Instruments (Details 7)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$1true 3pfg_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNetLineItemspfg_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Effect of derivatives not designated as hedging instruments on the consolidated statements of operations2false 4us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNetus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-45900000-45.9USD$falsetruefalse2truefalsefalse3350000033.5USD$falsetruefalse3truefalsefalse-53500000-53.5USD$falsetruefalse4truefalsefalse4920000049.2USD$falsetruefalsexbrli:monetaryItemTypemonetaryNet gain (loss) from the increase (decrease) in fair value of derivative instrument not designated as hedging instrument.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(1)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Amount of gain (loss) recognized in net income on derivatives3false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5false USDtruefalse$D2013Q2_InterestRateContractMemberhttp://www.sec.gov/CIK0001126328duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseInterest rate contractsus-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_InterestRateContractMemberus-gaap_DerivativeByNatureAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Interest rate contracts4true 3pfg_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNetLineItemspfg_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Effect of derivatives not designated as hedging instruments on the consolidated statements of operations5false 4us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNetus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-62500000-62.5USD$falsefalsefalse2truefalsefalse6100000061.0USD$falsefalsefalse3truefalsefalse-92100000-92.1USD$falsefalsefalse4truefalsefalse2620000026.2USD$falsefalsefalsexbrli:monetaryItemTypemonetaryNet gain (loss) from the increase (decrease) in fair value of derivative instrument not designated as hedging instrument.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(1)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Amount of gain (loss) recognized in net income on derivatives6false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse9false USDtruefalse$D2013Q2_ForeignExchangeContractMemberhttp://www.sec.gov/CIK0001126328duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseForeign exchange contractsus-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignExchangeContractMemberus-gaap_DerivativeByNatureAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Foreign exchange contracts7true 3pfg_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNetLineItemspfg_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Effect of derivatives not designated as hedging instruments on the consolidated statements of operations8false 4us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNetus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-16100000-16.1USD$falsefalsefalse2truefalsefalse-14000000-14.0USD$falsefalsefalse3truefalsefalse-11800000-11.8USD$falsefalsefalse4truefalsefalse1360000013.6USD$falsefalsefalsexbrli:monetaryItemTypemonetaryNet gain (loss) from the increase (decrease) in fair value of derivative instrument not designated as hedging instrument.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(1)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Amount of gain (loss) recognized in net income on derivatives9false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse13false USDtruefalse$D2013Q2_EquityContractMemberhttp://www.sec.gov/CIK0001126328duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseEquity contractsus-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_EquityContractMemberus-gaap_DerivativeByNatureAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Equity contracts10true 3pfg_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNetLineItemspfg_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Effect of derivatives not designated as hedging instruments on the consolidated statements of operations11false 4us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNetus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-16900000-16.9USD$falsefalsefalse2truefalsefalse4160000041.6USD$falsefalsefalse3truefalsefalse-71500000-71.5USD$falsefalsefalse4truefalsefalse-22300000-22.3USD$falsefalsefalsexbrli:monetaryItemTypemonetaryNet gain (loss) from the increase (decrease) in fair value of derivative instrument not designated as hedging instrument.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(1)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Amount of gain (loss) recognized in net income on derivatives12false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse17false USDtruefalse$D2013Q2_CreditRiskContractMemberhttp://www.sec.gov/CIK0001126328duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseCredit contractsus-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CreditRiskContractMemberus-gaap_DerivativeByNatureAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Credit contracts13true 3pfg_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNetLineItemspfg_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Effect of derivatives not designated as hedging instruments on the consolidated statements of operations14false 4us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNetus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse73000007.3USD$falsefalsefalse2truefalsefalse-9100000-9.1USD$falsefalsefalse3truefalsefalse2240000022.4USD$falsefalsefalse4truefalsefalse95000009.5USD$falsefalsefalsexbrli:monetaryItemTypemonetaryNet gain (loss) from the increase (decrease) in fair value of derivative instrument not designated as hedging instrument.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(1)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Amount of gain (loss) recognized in net income on derivatives15false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse21false USDtruefalse$D2013Q2_OtherContractMemberhttp://www.sec.gov/CIK0001126328duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseOther contractsus-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherContractMemberus-gaap_DerivativeByNatureAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Other contracts16true 3pfg_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNetLineItemspfg_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Effect of derivatives not designated as hedging instruments on the consolidated statements of operations17false 4us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNetus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse4230000042.3USD$falsetruefalse2truefalsefalse-46000000-46.0USD$falsetruefalse3truefalsefalse9950000099.5USD$falsetruefalse4truefalsefalse2220000022.2USD$falsetruefalsexbrli:monetaryItemTypemonetaryNet gain (loss) from the increase (decrease) in fair value of derivative instrument not designated as hedging instrument.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(1)(b) -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 derivativesfalseDerivative Financial Instruments (Details 7) (USD $)HundredThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://principal.com/role/DisclosureDerivativeFinancialInstrumentsDetails7417