2.4.0.82405423 - Disclosure - Investments and Derivative Instruments (Details Textual)truefalsefalse1false USDfalsefalse$D2012Q4http://www.sec.gov/CIK0000045947duration2012-10-01T00:00:002012-12-31T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SecurityStandardhttp://www.thehartford.com/20130913Securityhig0numberStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2false USDfalsefalse$D2012Q3http://www.sec.gov/CIK0000045947duration2012-07-01T00:00:002012-09-30T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalse$D2012Q2http://www.sec.gov/CIK0000045947duration2012-04-01T00:00:002012-06-30T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDfalsefalse$D2012Q1http://www.sec.gov/CIK0000045947duration2012-01-01T00:00:002012-03-31T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170numberStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$5false USDfalsefalse$D2011Q4http://www.sec.gov/CIK0000045947duration2011-10-01T00:00:002011-12-31T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170numberStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$6false USDfalsefalse$D2011Q3http://www.sec.gov/CIK0000045947duration2011-07-01T00:00:002011-09-30T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$7false USDfalsefalse$D2011Q2http://www.sec.gov/CIK0000045947duration2011-04-01T00:00:002011-06-30T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$8false USDfalsefalse$D2011Q1http://www.sec.gov/CIK0000045947duration2011-01-01T00:00:002011-03-31T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$9false USDfalsefalse$D2012Q4YTDhttp://www.sec.gov/CIK0000045947duration2012-01-01T00:00:002012-12-31T00:00:00loansStandardhttp://www.thehartford.com/20130913loanshig0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SecurityStandardhttp://www.thehartford.com/20130913Securityhig0numberStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$10false USDfalsefalse$D2011Q4YTDhttp://www.sec.gov/CIK0000045947duration2011-01-01T00:00:002011-12-31T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170numberStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$11false USDfalsefalse$D2010Q4YTDhttp://www.sec.gov/CIK0000045947duration2010-01-01T00:00:002010-12-31T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1false 4hig_CompanysPercentageOfLargestExposureToInvestedAssetshig_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.100.10falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truetruefalse0.100.10falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsenum:percentItemTypepureCompany's percentage of largest exposure to invested assets.No definition available.false0Percentage of largest exposure to invested assets2false 4hig_CompanysExposuresInCommercialRealEstateSectorPercentageOfInvestedAssetshig_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.100.10falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truetruefalse0.140.14falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truetruefalse0.100.10falsefalsefalse10truetruefalse0.140.14falsefalsefalse11falsefalsefalse00falsefalsefalsenum:percentItemTypepureCompany's exposures in commercial real estate sector percentage of invested assets.No definition available.false0Exposures in commercial real estate sector percentage of invested assets3false 4hig_CompanysExposuresInMunicipalInvestmentsSectorPercentageOfInvestedAssetshig_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.080.08falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truetruefalse0.090.09falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truetruefalse0.080.08falsefalsefalse10truetruefalse0.090.09falsefalsefalse11falsefalsefalse00falsefalsefalsenum:percentItemTypepureCompany's exposures in municipal investments sector percentage of invested assets.No definition available.false0Company's exposures in municipal investments sector percentage of invested assets4false 4hig_CompanysExposuresInBasicIndustrySectorPercentageOfInvestedAssetshig_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.080.08falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truetruefalse0.090.09falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truetruefalse0.080.08falsefalsefalse10truetruefalse0.090.09falsefalsefalse11falsefalsefalse00falsefalsefalsenum:percentItemTypepureCompany's exposures in basic industry sector percentage of invested assets.No definition available.false0Company's exposures in basic industry sector percentage of invested assets5false 4hig_NumberOfSecuritiesIncludedInAfsSecuritiesInUnrealizedLossPositionhig_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse12441244falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse12441244falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerNumber of securities included in AFS securities in unrealized loss position.No definition available.false256Number of securities included in AFS securities in unrealized loss position6false 4hig_PercentageOfGrossUnrealizedLossesDepressedLessThanTwentyPercentOfCostOrAmortizedCosthig_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.830.83falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truetruefalse0.830.83falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsenum:percentItemTypepurePercentage of gross unrealized losses depressed less than twenty percent of cost or amortized cost.No definition available.false0Percentage of gross unrealized losses depressed7false 4hig_SecuritiesDepressedToCostOrAmortizedCostLowerLimithig_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.200.20falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truetruefalse0.200.20falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsenum:percentItemTypepureSecurities depressed to cost or amortized cost lower limit.No definition available.false0Securities depressed to cost or amortized cost lower limit8false 4hig_NumberOfYearsToMaturityForSecuritiesConcentratedInFinancialServicesSectorhig_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse0010 yearsfalsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaNumber of years to maturity for securities concentrated in the financial services sector.No definition available.false0Number of years to maturity for securities concentrated in financial services sector9false 4hig_CarryingValueOfMortgageLoansAssociatedWithValuationAllowancehig_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse189000000189000000USD$falsetruefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse347000000347000000USD$falsetruefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse189000000189000000USD$falsetruefalse10truefalsefalse347000000347000000USD$falsetruefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryCarrying value of mortgage loans associated with the valuation allowance.No definition available.false2Carrying value of mortgage loans valuation allowance10false 4hig_CertainLoansAcquiredInTransferHeldForSaleAccountedForAsDebtSecuritiesCarryingAmountNethig_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse4700000047000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse5700000057000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse4700000047000000USD$falsefalsefalse10truefalsefalse5700000057000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryCertain loans acquired in transfer held-for-sale accounted for as debt securities carrying amount net.No definition available.false2Debt securities carrying amount11false 4hig_CertainLoansAndDebtSecuritiesAcquiredInTransferHeldForSaleAllowanceForCreditLossesDueToSubsequentImpairmenthig_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse30000003000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse40000004000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse30000003000000USD$falsefalsefalse10truefalsefalse40000004000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryCertain loans and debt securities acquired in transfer held for sale allowance for credit losses due to subsequent impairment.No definition available.false2Subsequent impairment12false 4hig_CurrentWeightedAverageLoanToValueRatioOfCommercialMortgageLoanhig_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.610.61falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truetruefalse0.610.61falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsenum:percentItemTypepureCurrent weighted average loan to value ratio of commercial mortgage loan.No definition available.false0Current weighted average loan to value ratio of commercial mortgage loan13false 4hig_OriginalWeightedAverageLoanToValueRatioOfCommercialMortgageLoanhig_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.630.63falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truetruefalse0.630.63falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsenum:percentItemTypepureOriginal weighted average loan to value ratio of commercial mortgage loan.No definition available.false0Weighted average loan to value ratio of commercial mortgage loan14false 4hig_AvailableForSaleSecuritiesMortgageLoansAverageDebtServiceCoverageRatiohig_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse2.342.34falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse2.342.34falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:decimalItemTypedecimalAvailable-for-sale securities mortgage loans average debt service coverage ratio.No definition available.false0Avg Debt-Service Coverage Ratio15false 4hig_MortgageLoansOnCommercialPrincipoalAmountOfDelinquentLoanshig_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse11falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerMortgage Loans on Commercial, Principoal Amount of Delinquent LoansNo definition available.false256Principoal amount of delinquent loans16false 4hig_LimitedPartnershipsAndOtherAlternativeInvestmentshig_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse13720000001372000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse13760000001376000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse13720000001372000000USD$falsefalsefalse10truefalsefalse13760000001376000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe carrying amount of investments in Limited partnerships and other alternative investments.No definition available.false2Limited partnerships and other alternative investments17false 4us-gaap_Assetsus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse215891000000215891000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse221787000000221787000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse215891000000215891000000USD$falsefalsefalse10truefalsefalse221787000000221787000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetarySum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Concepts (CON) -Number 6 -Paragraph 25 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Assets18false 4us-gaap_Liabilitiesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse205508000000205508000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse212876000000212876000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse205508000000205508000000USD$falsefalsefalse10truefalsefalse212876000000212876000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetarySum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19-26) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 false2Liabilities19false 4us-gaap_NetInvestmentIncomeus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse25360000002536000000USD$falsefalsefalse10truefalsefalse25720000002572000000USD$falsefalsefalse11truefalsefalse26120000002612000000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe income earned from investments in securities and property, equipment and other capital assets. It includes rent from property and equipment, dividends from shares in corporations, and interest from bonds, loans, mortgages, derivatives, commercial paper, bank accounts, certificates of deposits, treasuries, and other financial securities. It does not include realized gains and losses on investments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 16 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.2) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 2 -Article 7 false2Net Investment Income20false 4us-gaap_NetIncomeLossus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-25000000-25000000USD$falsefalsefalse2truefalsefalse203000000203000000USD$falsefalsefalse3truefalsefalse8700000087000000USD$falsefalsefalse4truefalsefalse289000000289000000USD$falsefalsefalse5truefalsefalse191000000191000000USD$falsefalsefalse6truefalsefalse-499000000-499000000USD$falsefalsefalse7truefalsefalse319000000319000000USD$falsefalsefalse8truefalsefalse233000000233000000USD$falsefalsefalse9truefalsefalse554000000554000000USD$falsefalsefalse10truefalsefalse244000000244000000USD$falsefalsefalse11truefalsefalse699000000699000000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe portion of profit or loss for the period, net of income taxes, which is attributable to the parent.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28, 29, 30 -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 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.18) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.22) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 10, 15 -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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e565-108580 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a -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 12: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A7 -Appendix A Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph d -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 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 16: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 87-21 -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. false2Net income21false 4hig_CollateralObtainedOffOfFairValueOfSecuritiesTransferredPercentagehig_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.950.95falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truetruefalse0.950.95falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsenum:percentItemTypepureCollateral Obtained off of Fair Value of Securities Transferred, PercentageNo definition available.false0Collateral amount equal to at least22false 4us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosureus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse16000000001600000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse16000000001600000000USD$falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. The amount of securities that an institution sells and agrees to repurchase (seller-borrower) at a specified date for a specified price, net of any reductions or offsets. Most repurchase agreements involve obligations of the federal government or its agencies, but other financial instruments, such as commercial paper, banker's acceptances, and negotiable certificates of deposit (CDs), are sometimes used in repurchase agreements. A repurchase agreement is similar to the seller-borrower's borrowing funds equal to the sales price of the related securities with the securities as collateral. Maturities of such agreements are flexible and generally vary from one day to 270 days.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 4 -IssueDate 2006-05-01 -Chapter 14 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Securities loaned or sold under agreements to repurchase23false 4us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-1600000000-1600000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse-1600000000-1600000000USD$falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe carrying value as of the balance sheet date of securities that an institution sells and agrees to repurchase (the identical or substantially the same securities) as a seller-borrower at a specified date for a specified price, also known as a repurchase agreement, or repo. Most repos involve obligations of the federal government or its agencies, but other financial instruments, such as commercial paper, banker's acceptances, and negotiable certificates of deposit, are sometimes used in repos.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(1)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph 1 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7472769&loc=d3e9760-107771 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 100 -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(a)(i)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Paragraph 36 -IssueDate 2006-05-01 -Chapter 4 -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. false2Securities sold under agreements to repurchase24false 4us-gaap_NotionalAmountOfInterestRateFairValueHedgeDerivativesus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse51000000005100000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse51000000005100000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse51000000005100000000USD$falsefalsefalse10truefalsefalse51000000005100000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAggregate notional amount of all interest rate derivatives designated as hedging instruments in fair value hedges. Notional amount refers to the monetary amount specified in the interest rate derivative contract.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959 false2Notional amount of interest rate fair value hedge derivatives25false 4invest_DerivativeNotionalAmountinvest_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse205854000000205854000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse196608000000196608000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse205854000000205854000000USD$falsefalsefalse10truefalsefalse196608000000196608000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAggregate notional amount specified by the derivative(s). Expressed as an absolute value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B false2Notional Amount26false 4hig_DecreaseInNotionalAmountOfHedgingInstrumentshig_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse3920000000039200000000USD$falsefalsefalse10truefalsefalse2730000000027300000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryDecrease in notional amount of hedging instruments.No definition available.false2Decrease in notional amount of hedging instruments27false 4hig_NetIncreaseInNotionalAmounthig_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse1190000000011900000000USD$falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryNet increase in notional amount.No definition available.false2Net Increase in Notional Amount28false 4us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonthsus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse140000000140000000USD$falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80748-113994 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Cash flow hedge gain (loss) to be reclassified within29false 4us-gaap_SecurityOwnedAndPledgedAsCollateralFairValueus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse370000000370000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse762000000762000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse370000000370000000USD$falsefalsefalse10truefalsefalse762000000762000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryFair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=7523297&loc=SL6224234-111729 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS140-4/FIN46(R)-8 -Paragraph B6 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 17 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728 false2Fair value collateral pledged30false 4hig_FairValueOfAcceptedCollateralhig_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse27000000002700000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse24000000002400000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse27000000002700000000USD$falsefalsefalse10truefalsefalse24000000002400000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryFair value of accepted collateral.No definition available.false2Fair value of accepted collateral31false 4hig_CashCollateralReceivedhig_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse22000000002200000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse19000000001900000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse22000000002200000000USD$falsefalsefalse10truefalsefalse19000000001900000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryCash collateral received.No definition available.false2Cash collateral received32false 4hig_FairValueOfSecuritiesOnDeposithig_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1400000014000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse1400000014000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse1400000014000000USD$falsefalsefalse10truefalsefalse1400000014000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryFair value of securities on deposit.No definition available.false2Fair value of securities on deposit33false 4us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilitiesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse111000000111000000[1]USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse477000000477000000[1]USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse111000000111000000[1]USD$falsefalsefalse10truefalsefalse477000000477000000[1]USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=7880789&loc=d3e5710-111685 false2Variable interest entity liabilities for other liabilities34false 4us-gaap_CashFlowHedgeGainLossReclassifiedToEarningsNetus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse9100000091000000USD$falsefalsefalse10truefalsefalse00USD$falsefalsefalse11truefalsefalse10000001000000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount of net gains or losses on a cash flow hedge reclassified in the period to earnings from accumulated other comprehensive income.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80784-113994 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(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. false2Reclassified to earnings35false 4hig_GrossGainsAndLossesOnSalesAndImpairmentsReportedInAocihig_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse-55000000-55000000USD$falsefalsefalse10truefalsefalse7500000075000000USD$falsefalsefalse11truefalsefalse-190000000-190000000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryGross gains and losses on sales and impairments reported in AOCI.No definition available.false2Gross gains and losses on sales and impairments reported in AOCI36false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse12false USDtruefalse$D2012Q4YTD_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_us-gaap_EquitySecuritiesMemberhttp://www.sec.gov/CIK0000045947duration2012-01-01T00:00:002012-12-31T00:00:00falsefalseEquity Securities [Member]us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_EquitySecuritiesMemberus-gaap_MajorTypesOfDebtAndEquitySecuritiesAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Equity Securities [Member]37false 4us-gaap_TradingSecuritiesUnrealizedHoldingGainLossus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse00USD$falsefalsefalse10truefalsefalse10000001000000USD$falsefalsefalse11truefalsefalse50000005000000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe net change in the difference between the fair value and the carrying value, or in the comparative fair values, of trading securities held at each balance sheet date, that was included in earnings for the period. Trading securities are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) and the change in net unrealized holding gain (loss) is included in earnings for the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 13 -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 Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 12 -Subparagraph a -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(c)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 21 -Subparagraph e -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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 35 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=16383099&loc=d3e24584-111560 false2Change in unrealized holding gain (loss)38false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse15false truefalseI2012Q4_dei_LegalEntityAxis_hig_GovernmentOfJapanGovernmentOfUnitedKingdomAndTAndTIncMemberhttp://www.sec.gov/CIK0000045947instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseGovernment of Japan Government of United Kingdom And T And T Inc [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldihig_GovernmentOfJapanGovernmentOfUnitedKingdomAndTAndTIncMemberdei_LegalEntityAxisexplicitMembernumberStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0Government of Japan Government of United Kingdom And T And T Inc [Member]39false 4hig_CompanysPercentageOfLargestExposureToInvestedAssetshig_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.0230.023falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truetruefalse0.0230.023falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsenum:percentItemTypepureCompany's percentage of largest exposure to invested assets.No definition available.false0Percentage of largest exposure to invested assets40false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse16false truefalseI2011Q4_dei_LegalEntityAxis_hig_JpMorganChaseAndCoWellsFargoAndCoAndAtAndTIncMemberhttp://www.sec.gov/CIK0000045947instant2011-12-31T00:00:000001-01-01T00:00:00falsefalseJp Morgan Chase and Co Wells Fargo and Co and At and T Inc [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldihig_JpMorganChaseAndCoWellsFargoAndCoAndAtAndTIncMemberdei_LegalEntityAxisexplicitMembernumberStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0Jp Morgan Chase and Co Wells Fargo and Co and At and T Inc [Member]41false 4hig_CompanysPercentageOfLargestExposureToInvestedAssetshig_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truetruefalse0.0120.012falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10truetruefalse0.0120.012falsefalsefalse11falsefalsefalse00falsefalsefalsenum:percentItemTypepureCompany's percentage of largest exposure to invested assets.No definition available.false0Percentage of largest exposure to invested assets42false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse17false USDtruefalseD2012Q4YTD_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_hig_CommercialMemberhttp://www.sec.gov/CIK0000045947duration2012-01-01T00:00:002012-12-31T00:00:00falsefalseCommercial [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldihig_CommercialMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$nanafalse0Commercial [Member]43false 4hig_FinancingReceivableRecordedInvestmentDelinquencyPeriodhig_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse0090 days or morefalsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringFinancing receivable recorded investment delinquency period.No definition available.false0Investment delinquency period44false 4us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruingus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse3200000032000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse3200000032000000USD$falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRecorded investment in financing receivables that are 90 days or more past due and still accruing.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5111-111524 false2Recorded investment 90 days past due and still accruing45false 4us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse00USD$falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Allowance for credit losses46false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse18false USDtruefalse$I2012Q4_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMemberhttp://www.sec.gov/CIK0000045947instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseVariable Interest Entity, Not Primary Beneficiary [Member]us-gaap_VariableInterestEntitiesByClassificationOfEntityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_VariableInterestEntityNotPrimaryBeneficiaryMemberus-gaap_VariableInterestEntitiesByClassificationOfEntityAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Variable Interest Entity, Not Primary Beneficiary [Member]47false 4us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse344000000344000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse344000000344000000USD$falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryCarrying amount of the assets in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), where the reporting entity is not the VIE's primary beneficiary.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph a -URI http://asc.fasb.org/extlink&oid=7880789&loc=d3e5728-111685 false2Carrying amount assets48false 4us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountLiabilitiesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse319000000319000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse319000000319000000USD$falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryCarrying amount of the liabilities in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), where the reporting entity is not the VIE's primary beneficiary.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph a -URI http://asc.fasb.org/extlink&oid=7880789&loc=d3e5728-111685 false2Carrying amount liabilities49false 4us-gaap_VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposureus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse60000006000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse60000006000000USD$falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryDifference between the carrying amount of assets and liabilities in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the variable interest entity (VIE) and the reporting entity's maximum exposure to loss as a result of its involvement with the VIE, where the reporting entity is not the VIE's primary beneficiary.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS140-4/FIN46(R)-8 -Paragraph C6 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7880789&loc=d3e5728-111685 false2Maximum loss exposure50false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse19false USDtruefalse$D2012Q4YTD_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_us-gaap_LimitedPartnerMemberhttp://www.sec.gov/CIK0000045947duration2012-01-01T00:00:002012-12-31T00:00:00falsefalseLimited Partner [Member]us-gaap_RelatedPartyTransactionsByRelatedPartyAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_LimitedPartnerMemberus-gaap_RelatedPartyTransactionsByRelatedPartyAxisexplicitMembernumberStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Limited Partner [Member]51false 4hig_LimitedPartnershipsAndOtherAlternativeInvestmentshig_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse14000000001400000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse14000000001400000000USD$falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe carrying amount of investments in Limited partnerships and other alternative investments.No definition available.false2Limited partnerships and other alternative investments52false 4hig_OutstandingCommitmentsToFundLimitedPartnershipAndOtherAlternativeInvestmentshig_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse269000000269000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse269000000269000000USD$falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryOutstanding commitments to fund limited partnership and other alternative investments.No definition available.false2Outstanding commitments to fund limited partnership and other alternative investments53false 4hig_AggregateInvestmentLossPercentageOfCompanysPreTaxConsolidatedNetIncomeMinimumhig_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truetruefalse0.100.10falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsenum:percentItemTypepureAggregate investment loss percentage of Company's pre-tax consolidated net income, minimum.No definition available.false0Aggregate investment loss percentage of Company's pre-tax consolidated net income, minimum54false 4us-gaap_Assetsus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse7530000000075300000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse7570000000075700000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse7530000000075300000000USD$falsefalsefalse10truefalsefalse7570000000075700000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetarySum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Concepts (CON) -Number 6 -Paragraph 25 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Assets55false 4us-gaap_Liabilitiesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse96000000009600000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse1380000000013800000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse96000000009600000000USD$falsefalsefalse10truefalsefalse1380000000013800000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetarySum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19-26) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 false2Liabilities56false 4us-gaap_NetInvestmentIncomeus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse900000000900000000USD$falsefalsefalse10truefalsefalse12000000001200000000USD$falsefalsefalse11truefalsefalse927000000927000000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe income earned from investments in securities and property, equipment and other capital assets. It includes rent from property and equipment, dividends from shares in corporations, and interest from bonds, loans, mortgages, derivatives, commercial paper, bank accounts, certificates of deposits, treasuries, and other financial securities. It does not include realized gains and losses on investments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 16 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.2) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 2 -Article 7 false2Net Investment Income57false 4us-gaap_NetIncomeLossus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse65000000006500000000USD$falsefalsefalse10truefalsefalse81000000008100000000USD$falsefalsefalse11truefalsefalse97000000009700000000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe portion of profit or loss for the period, net of income taxes, which is attributable to the parent.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28, 29, 30 -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 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.18) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.22) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 10, 15 -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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e565-108580 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a -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 12: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A7 -Appendix A Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph d -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 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 16: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 87-21 -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. false2Net income58false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse22false USDtruefalse$I2012Q4_us-gaap_DerivativeByNatureAxis_hig_InternationalProgramHedgingInstrumentsMemberhttp://www.sec.gov/CIK0000045947instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseInternational Program Hedging Instruments [Member]us-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldihig_InternationalProgramHedgingInstrumentsMemberus-gaap_DerivativeByNatureAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0International Program Hedging Instruments [Member]59false 4invest_DerivativeNotionalAmountinvest_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse4844800000048448000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse2871900000028719000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse4844800000048448000000USD$falsefalsefalse10truefalsefalse2871900000028719000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAggregate notional amount specified by the derivative(s). Expressed as an absolute value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B false2Notional Amount60false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse24false USDtruefalse$I2012Q4_us-gaap_DerivativeByNatureAxis_hig_InternationalProgramHedgingInstrumentsMember_us-gaap_DerivativeInstrumentRiskAxis_us-gaap_ForeignExchangeForwardMemberhttp://www.sec.gov/CIK0000045947instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseInternational Program Hedging Instruments [Member]us-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldihig_InternationalProgramHedgingInstrumentsMemberus-gaap_DerivativeByNatureAxisexplicitMemberfalsefalseForeign Exchange Forward [Member]us-gaap_DerivativeInstrumentRiskAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignExchangeForwardMemberus-gaap_DerivativeInstrumentRiskAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0International Program Hedging Instruments [Member] | Foreign Exchange Forward [Member]61false 4invest_DerivativeNotionalAmountinvest_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse93270000009327000000[2]USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse86220000008622000000[2]USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse93270000009327000000[2]USD$falsefalsefalse10truefalsefalse86220000008622000000[2]USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAggregate notional amount specified by the derivative(s). Expressed as an absolute value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B false2Notional Amount62false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse26false USDtruefalse$I2012Q4_us-gaap_DerivativeByNatureAxis_hig_InternationalProgramHedgingInstrumentsMember_us-gaap_DerivativeInstrumentRiskAxis_us-gaap_EquitySwapMemberhttp://www.sec.gov/CIK0000045947instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseInternational Program Hedging Instruments [Member]us-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldihig_InternationalProgramHedgingInstrumentsMemberus-gaap_DerivativeByNatureAxisexplicitMemberfalsefalseEquity Swap [Member]us-gaap_DerivativeInstrumentRiskAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_EquitySwapMemberus-gaap_DerivativeInstrumentRiskAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0International Program Hedging Instruments [Member] | Equity Swap [Member]63false 4invest_DerivativeNotionalAmountinvest_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse26830000002683000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse392000000392000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse26830000002683000000USD$falsefalsefalse10truefalsefalse392000000392000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAggregate notional amount specified by the derivative(s). Expressed as an absolute value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B false2Notional Amount64false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse28false USDtruefalse$I2012Q4_us-gaap_DerivativeByNatureAxis_hig_InternationalProgramHedgingInstrumentsMember_us-gaap_DerivativeInstrumentRiskAxis_us-gaap_ForeignExchangeForwardMember_us-gaap_HedgingDesignationAxis_hig_NetHedgePositionMemberhttp://www.sec.gov/CIK0000045947instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseInternational Program Hedging Instruments [Member]us-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldihig_InternationalProgramHedgingInstrumentsMemberus-gaap_DerivativeByNatureAxisexplicitMemberfalsefalseNet Hedge Position [Member]us-gaap_HedgingDesignationAxisxbrldihttp://xbrl.org/2006/xbrldihig_NetHedgePositionMemberus-gaap_HedgingDesignationAxisexplicitMemberfalsefalseForeign Exchange Forward [Member]us-gaap_DerivativeInstrumentRiskAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignExchangeForwardMemberus-gaap_DerivativeInstrumentRiskAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0International Program Hedging Instruments [Member] | Net Hedge Position [Member] | Foreign Exchange Forward [Member]65false 4invest_DerivativeNotionalAmountinvest_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse100000000100000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse72000000007200000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse100000000100000000USD$falsefalsefalse10truefalsefalse72000000007200000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAggregate notional amount specified by the derivative(s). Expressed as an absolute value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B false2Notional Amount66false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse30false USDtruefalse$I2012Q4_us-gaap_DerivativeByNatureAxis_hig_InternationalProgramHedgingInstrumentsMember_us-gaap_DerivativeInstrumentRiskAxis_us-gaap_ForeignExchangeForwardMember_us-gaap_HedgingDesignationAxis_hig_LongHedgePositionMemberhttp://www.sec.gov/CIK0000045947instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseInternational Program Hedging Instruments [Member]us-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldihig_InternationalProgramHedgingInstrumentsMemberus-gaap_DerivativeByNatureAxisexplicitMemberfalsefalseLong Hedge Position [Member]us-gaap_HedgingDesignationAxisxbrldihttp://xbrl.org/2006/xbrldihig_LongHedgePositionMemberus-gaap_HedgingDesignationAxisexplicitMemberfalsefalseForeign Exchange Forward [Member]us-gaap_DerivativeInstrumentRiskAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignExchangeForwardMemberus-gaap_DerivativeInstrumentRiskAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0International Program Hedging Instruments [Member] | Long Hedge Position [Member] | Foreign Exchange Forward [Member]67false 4invest_DerivativeNotionalAmountinvest_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse47000000004700000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse79000000007900000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse47000000004700000000USD$falsefalsefalse10truefalsefalse79000000007900000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAggregate notional amount specified by the derivative(s). Expressed as an absolute value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B false2Notional Amount68false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse32false USDtruefalse$I2012Q4_us-gaap_DerivativeByNatureAxis_hig_InternationalProgramHedgingInstrumentsMember_us-gaap_DerivativeInstrumentRiskAxis_us-gaap_EquitySwapMember_us-gaap_HedgingDesignationAxis_hig_LongHedgePositionMemberhttp://www.sec.gov/CIK0000045947instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseInternational Program Hedging Instruments [Member]us-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldihig_InternationalProgramHedgingInstrumentsMemberus-gaap_DerivativeByNatureAxisexplicitMemberfalsefalseLong Hedge Position [Member]us-gaap_HedgingDesignationAxisxbrldihttp://xbrl.org/2006/xbrldihig_LongHedgePositionMemberus-gaap_HedgingDesignationAxisexplicitMemberfalsefalseEquity Swap [Member]us-gaap_DerivativeInstrumentRiskAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_EquitySwapMemberus-gaap_DerivativeInstrumentRiskAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0International Program Hedging Instruments [Member] | Long Hedge Position [Member] | Equity Swap [Member]69false 4invest_DerivativeNotionalAmountinvest_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse4380000000043800000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse2800000000028000000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse4380000000043800000000USD$falsefalsefalse10truefalsefalse2800000000028000000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAggregate notional amount specified by the derivative(s). Expressed as an absolute value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B false2Notional Amount70false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse34false USDtruefalse$I2012Q4_us-gaap_DerivativeByNatureAxis_hig_InternationalProgramHedgingInstrumentsMember_us-gaap_DerivativeInstrumentRiskAxis_us-gaap_ForeignExchangeForwardMember_us-gaap_HedgingDesignationAxis_hig_ShortHedgePositionMemberhttp://www.sec.gov/CIK0000045947instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseInternational Program Hedging Instruments [Member]us-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldihig_InternationalProgramHedgingInstrumentsMemberus-gaap_DerivativeByNatureAxisexplicitMemberfalsefalseShort Hedge Position [Member]us-gaap_HedgingDesignationAxisxbrldihttp://xbrl.org/2006/xbrldihig_ShortHedgePositionMemberus-gaap_HedgingDesignationAxisexplicitMemberfalsefalseForeign Exchange Forward [Member]us-gaap_DerivativeInstrumentRiskAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignExchangeForwardMemberus-gaap_DerivativeInstrumentRiskAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0International Program Hedging Instruments [Member] | Short Hedge Position [Member] | Foreign Exchange Forward [Member]71false 4invest_DerivativeNotionalAmountinvest_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse46000000004600000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse700000000700000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse46000000004600000000USD$falsefalsefalse10truefalsefalse700000000700000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAggregate notional amount specified by the derivative(s). Expressed as an absolute value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B false2Notional Amount72false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse36false USDtruefalse$I2012Q4_us-gaap_DerivativeByNatureAxis_hig_InternationalProgramHedgingInstrumentsMember_us-gaap_DerivativeInstrumentRiskAxis_us-gaap_EquitySwapMember_us-gaap_HedgingDesignationAxis_hig_ShortHedgePositionMemberhttp://www.sec.gov/CIK0000045947instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseInternational Program Hedging Instruments [Member]us-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldihig_InternationalProgramHedgingInstrumentsMemberus-gaap_DerivativeByNatureAxisexplicitMemberfalsefalseShort Hedge Position [Member]us-gaap_HedgingDesignationAxisxbrldihttp://xbrl.org/2006/xbrldihig_ShortHedgePositionMemberus-gaap_HedgingDesignationAxisexplicitMemberfalsefalseEquity Swap [Member]us-gaap_DerivativeInstrumentRiskAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_EquitySwapMemberus-gaap_DerivativeInstrumentRiskAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0International Program Hedging Instruments [Member] | Short Hedge Position [Member] | Equity Swap [Member]73false 4invest_DerivativeNotionalAmountinvest_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse46000000004600000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse700000000700000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse46000000004600000000USD$falsefalsefalse10truefalsefalse700000000700000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAggregate notional amount specified by the derivative(s). Expressed as an absolute value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B false2Notional Amount74false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse38false USDtruefalse$I2012Q4_us-gaap_DerivativeByNatureAxis_hig_BasketCreditDefaultSwapsMember_us-gaap_HedgingDesignationAxis_hig_StandardMarketIndicesOfDiversifiedPortfoliosMemberhttp://www.sec.gov/CIK0000045947instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseBasket Credit Default Swaps [Member]us-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldihig_BasketCreditDefaultSwapsMemberus-gaap_DerivativeByNatureAxisexplicitMemberfalsefalseStandard Market Indices of Diversified Portfolios [Member]us-gaap_HedgingDesignationAxisxbrldihttp://xbrl.org/2006/xbrldihig_StandardMarketIndicesOfDiversifiedPortfoliosMemberus-gaap_HedgingDesignationAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Basket Credit Default Swaps [Member] | Standard Market Indices of Diversified Portfolios [Member]75false 4hig_AmountOfStandardMarketIndicesOfDiversifiedPortfoliosOfCorporateIssuershig_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse24000000002400000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse27000000002700000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse24000000002400000000USD$falsefalsefalse10truefalsefalse27000000002700000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of standard market indices of diversified portfolios of corporate issuers.No definition available.false2Standard market indices of diversified portfolios of corporate issuers76false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse40false USDtruefalse$I2011Q4_us-gaap_DerivativeByNatureAxis_hig_BasketCreditDefaultSwapsMember_us-gaap_HedgingDesignationAxis_hig_CustomizedDiversifiedPortfoliosMemberhttp://www.sec.gov/CIK0000045947instant2011-12-31T00:00:000001-01-01T00:00:00falsefalseBasket Credit Default Swaps [Member]us-gaap_DerivativeByNatureAxisxbrldihttp://xbrl.org/2006/xbrldihig_BasketCreditDefaultSwapsMemberus-gaap_DerivativeByNatureAxisexplicitMemberfalsefalseCustomized Diversified Portfolios [Member]us-gaap_HedgingDesignationAxisxbrldihttp://xbrl.org/2006/xbrldihig_CustomizedDiversifiedPortfoliosMemberus-gaap_HedgingDesignationAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Basket Credit Default Swaps [Member] | Customized Diversified Portfolios [Member]77false 4hig_AmountOfCustomizedDiversifiedPortfoliosOfCorporateIssuershig_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse478000000478000000USD$falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10truefalsefalse478000000478000000USD$falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of customized diversified portfolios of corporate issuers.No definition available.false2Amount of customized diversified portfolios of corporate issuers78false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse41false USDtruefalse$D2012Q4YTD_hig_CountriesAxis_country_JP_us-gaap_DerivativeInstrumentRiskAxis_hig_ThreeWinRelatedForeignCurrencySwapsMemberhttp://www.sec.gov/CIK0000045947duration2012-01-01T00:00:002012-12-31T00:00:00falsefalseJAPAN [Member]hig_CountriesAxisxbrldihttp://xbrl.org/2006/xbrldicountry_JPhig_CountriesAxisexplicitMemberfalsefalseThree Win Related Foreign Currency Swaps [Member]us-gaap_DerivativeInstrumentRiskAxisxbrldihttp://xbrl.org/2006/xbrldihig_ThreeWinRelatedForeignCurrencySwapsMemberus-gaap_DerivativeInstrumentRiskAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0JAPAN [Member] | Three Win Related Foreign Currency Swaps [Member]79false 4hig_AssociatedLiabilityAdjustedForChangesInSpotRatesThroughRealizedCapitalGainhig_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse189000000189000000USD$falsefalsefalse10truefalsefalse-100000000-100000000USD$falsefalsefalse11truefalsefalse-273000000-273000000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAssociated liability adjusted for changes in spot rates through realized capital gain.No definition available.false2Associated liability adjusted for changes in spot rates through realized capital gain80false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse44false USDtruefalse$D2012Q4YTD_hig_CountriesAxis_country_JP_us-gaap_DerivativeInstrumentRiskAxis_hig_FixedAnnuityHedgingInstrumentsMemberhttp://www.sec.gov/CIK0000045947duration2012-01-01T00:00:002012-12-31T00:00:00falsefalseJAPAN [Member]hig_CountriesAxisxbrldihttp://xbrl.org/2006/xbrldicountry_JPhig_CountriesAxisexplicitMemberfalsefalseFixed annuity hedging instruments [Member]us-gaap_DerivativeInstrumentRiskAxisxbrldihttp://xbrl.org/2006/xbrldihig_FixedAnnuityHedgingInstrumentsMemberus-gaap_DerivativeInstrumentRiskAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0JAPAN [Member] | Fixed annuity hedging instruments [Member]81false 4hig_AssociatedLiabilityAdjustedForChangesInSpotRatesThroughRealizedCapitalGainhig_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse245000000245000000USD$falsefalsefalse10truefalsefalse-129000000-129000000USD$falsefalsefalse11truefalsefalse-332000000-332000000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAssociated liability adjusted for changes in spot rates through realized capital gain.No definition available.false2Associated liability adjusted for changes in spot rates through realized capital gain82false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse47false USDtruefalse$D2012Q4YTD_us-gaap_ProductOrServiceAxis_hig_RetirementPlansMemberhttp://www.sec.gov/CIK0000045947duration2012-01-01T00:00:002012-12-31T00:00:00falsefalseRetirement [Member]us-gaap_ProductOrServiceAxisxbrldihttp://xbrl.org/2006/xbrldihig_RetirementPlansMemberus-gaap_ProductOrServiceAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Retirement [Member]83false 4hig_OttiLossesRecognizedInOtherComprehensiveIncomehig_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse173000000173000000USD$falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryOther-than-temporary impairment losses transferred to other comprehensive income in accordance with FAS FSP 115-2.No definition available.false2OTTI losses recognized in other comprehensive income84false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalse48false USDtruefalse$I2012Q4_hig_RepoAxis_hig_RepurchaseAgreementAndDollarRollMemberhttp://www.sec.gov/CIK0000045947instant2012-12-31T00:00:000001-01-01T00:00:00falsefalseRepurchase Agreement and Dollar Roll [Member]hig_RepoAxisxbrldihttp://xbrl.org/2006/xbrldihig_RepurchaseAgreementAndDollarRollMemberhig_RepoAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Repurchase Agreement and Dollar Roll [Member]85false 4hig_CashCollateralReceivedhig_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse16000000001600000000USD$falsetruefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9truefalsefalse16000000001600000000USD$falsetruefalse10falsefalsefalse00falsefalsefalse11falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryCash collateral received.No definition available.false2Cash collateral received1Included in other liabilities in the Company’s Consolidated Balance Sheets.2As of December 31, 2012 and 2011 net notional amounts are $0.1 billion and $7.2 billion, respectively, which include $4.7 billion and $7.9 billion, respectively, related to long positions and $4.6 billion and $0.7 billion, respectively, related to short positions.falseInvestments and Derivative Instruments (Details Textual) (USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.thehartford.com/role/InvestmentsAndDerivativeInstrumentsDetailsTextual1185