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Investments and Derivative Instruments Level 4 Non-qualifying Strategies for Hedge Accounting (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Maximum Aggregate Principal Amount of Junior Subordinated Notes $ 500hig_MaximumAggregatePrincipalAmountOfJuniorSubordinatedNotes    
Derivative, Notional Amount 72,850invest_DerivativeNotionalAmount 159,441invest_DerivativeNotionalAmount  
Derivative, Fair Value, Net (639)us-gaap_DerivativeFairValueOfDerivativeNet (737)us-gaap_DerivativeFairValueOfDerivativeNet  
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) [Abstract]      
Derivative, Gain (Loss) on Derivative, Net (353)us-gaap_DerivativeGainLossOnDerivativeNet (125)us-gaap_DerivativeGainLossOnDerivativeNet 105us-gaap_DerivativeGainLossOnDerivativeNet
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) Footnote [Abstract]      
Disposal Group, Assets of Business Transferred under Contractual Arrangement 1,000us-gaap_DisposalGroupAssetsOfBusinessTransferredUnderContractualArrangement 1,300us-gaap_DisposalGroupAssetsOfBusinessTransferredUnderContractualArrangement  
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member]      
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) [Abstract]      
Derivative, Gain (Loss) on Derivative, Net (34)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_CoinsuranceAndModifiedCoinsuranceReinsuranceContractsMember
67us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_CoinsuranceAndModifiedCoinsuranceReinsuranceContractsMember
0us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_CoinsuranceAndModifiedCoinsuranceReinsuranceContractsMember
Interest Rate Swaps Caps Floors and Futures [Member]      
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) [Abstract]      
Derivative, Gain (Loss) on Derivative, Net (172)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_InterestRateSwapsCapsFloorsAndFuturesMember
50us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_InterestRateSwapsCapsFloorsAndFuturesMember
22us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_InterestRateSwapsCapsFloorsAndFuturesMember
Interest Rate Swap [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative, Notional Amount 13,100invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
6,900invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
 
Foreign Currency Swaps and Forwards [Member]      
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) [Abstract]      
Derivative, Gain (Loss) on Derivative, Net 6us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_ForeignCurrencySwapsAndForwardsMember
5us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_ForeignCurrencySwapsAndForwardsMember
19us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_ForeignCurrencySwapsAndForwardsMember
Credit Derivatives that Purchase Credit Protection [Member]      
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) [Abstract]      
Derivative, Gain (Loss) on Derivative, Net (10)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_CreditDerivativesThatPurchaseCreditProtectionMember
(38)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_CreditDerivativesThatPurchaseCreditProtectionMember
(61)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_CreditDerivativesThatPurchaseCreditProtectionMember
Credit Derivatives that Assume Credit Risk [Member]      
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) [Abstract]      
Derivative, Gain (Loss) on Derivative, Net 16us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_CreditDerivativesThatAssumeCreditRiskMember
71us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_CreditDerivativesThatAssumeCreditRiskMember
291us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_CreditDerivativesThatAssumeCreditRiskMember
Equity Index Swaps and Options [Member]      
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) [Abstract]      
Derivative, Gain (Loss) on Derivative, Net 3us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_EquityIndexSwapsAndOptionsMember
(33)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_EquityIndexSwapsAndOptionsMember
(39)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_EquityIndexSwapsAndOptionsMember
Contingent Capital Facility Put Option [Member]      
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) [Abstract]      
Derivative, Gain (Loss) on Derivative, Net (6)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_ContingentCapitalFacilityPutOptionMember
(7)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_ContingentCapitalFacilityPutOptionMember
(6)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_ContingentCapitalFacilityPutOptionMember
Derivatives formerly associated with Japan [Member]      
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) [Abstract]      
Derivative, Gain (Loss) on Derivative, Net (2)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_DerivativesformerlyassociatedwithJapanMember
0us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_DerivativesformerlyassociatedwithJapanMember
0us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_DerivativesformerlyassociatedwithJapanMember
UNITED STATES | GMWB Hedging Instruments [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative, Notional Amount 14,442invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
18,691invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
 
Derivative, Fair Value, Net 174us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
41us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
 
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) [Abstract]      
Derivative, Gain (Loss) on Derivative, Net 3us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
(852)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
(631)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
UNITED STATES | GMWB Product Derivatives [Member]      
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) [Abstract]      
Derivative, Gain (Loss) on Derivative, Net (2)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbProductDerivativesMember
/ invest_InvestmentGeographicRegionAxis
= country_US
1,306us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbProductDerivativesMember
/ invest_InvestmentGeographicRegionAxis
= country_US
1,430us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbProductDerivativesMember
/ invest_InvestmentGeographicRegionAxis
= country_US
UNITED STATES | GMWB Reinsurance [Member]      
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) [Abstract]      
Derivative, Gain (Loss) on Derivative, Net 4us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbReinsuranceMember
/ invest_InvestmentGeographicRegionAxis
= country_US
(192)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbReinsuranceMember
/ invest_InvestmentGeographicRegionAxis
= country_US
(280)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbReinsuranceMember
/ invest_InvestmentGeographicRegionAxis
= country_US
JAPAN | Three Win Related Foreign Currency Swaps [Member]      
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) Footnote [Abstract]      
Associated Liability Adjusted for Changes in Spot Rates Through Realized Capital Gain 116hig_AssociatedLiabilityAdjustedForChangesInSpotRatesThroughRealizedCapitalGain
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_ThreeWinRelatedForeignCurrencySwapsMember
/ invest_InvestmentGeographicRegionAxis
= country_JP
250hig_AssociatedLiabilityAdjustedForChangesInSpotRatesThroughRealizedCapitalGain
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_ThreeWinRelatedForeignCurrencySwapsMember
/ invest_InvestmentGeographicRegionAxis
= country_JP
189hig_AssociatedLiabilityAdjustedForChangesInSpotRatesThroughRealizedCapitalGain
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_ThreeWinRelatedForeignCurrencySwapsMember
/ invest_InvestmentGeographicRegionAxis
= country_JP
JAPAN | Fixed Annuity Hedging Instruments [Member]      
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) [Abstract]      
Derivative, Gain (Loss) on Derivative, Net (148)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_FixedAnnuityHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_JP
(268)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_FixedAnnuityHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_JP
(300)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_FixedAnnuityHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_JP
[1]
Contingent Capital Facility Put Option [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Maximum Aggregate Principal Amount of Junior Subordinated Notes 500hig_MaximumAggregatePrincipalAmountOfJuniorSubordinatedNotes
/ us-gaap_DerivativeByNatureAxis
= hig_ContingentCapitalFacilityPutOptionMember
   
Derivative, Notional Amount 500invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hig_ContingentCapitalFacilityPutOptionMember
500invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hig_ContingentCapitalFacilityPutOptionMember
 
Derivative, Fair Value, Net 12us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_ContingentCapitalFacilityPutOptionMember
17us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_ContingentCapitalFacilityPutOptionMember
 
Macro Hedge Program [Member] | UNITED STATES      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative, Notional Amount 6,383invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ invest_InvestmentGeographicRegionAxis
= country_US
9,934invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ invest_InvestmentGeographicRegionAxis
= country_US
 
Derivative, Fair Value, Net 141us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ invest_InvestmentGeographicRegionAxis
= country_US
139us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ invest_InvestmentGeographicRegionAxis
= country_US
 
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) [Abstract]      
Derivative, Gain (Loss) on Derivative, Net (11)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ invest_InvestmentGeographicRegionAxis
= country_US
(234)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ invest_InvestmentGeographicRegionAxis
= country_US
(340)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ invest_InvestmentGeographicRegionAxis
= country_US
Macro Hedge Program [Member] | UNITED STATES | Equity Option [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative, Notional Amount 5,983invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_StockOptionMember
/ invest_InvestmentGeographicRegionAxis
= country_US
9,934invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_StockOptionMember
/ invest_InvestmentGeographicRegionAxis
= country_US
 
Derivative, Fair Value, Net 141us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_StockOptionMember
/ invest_InvestmentGeographicRegionAxis
= country_US
139us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_StockOptionMember
/ invest_InvestmentGeographicRegionAxis
= country_US
 
Macro Hedge Program [Member] | JAPAN | Foreign Exchange Option [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative, Notional Amount 400invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeOptionMember
/ invest_InvestmentGeographicRegionAxis
= country_JP
0invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeOptionMember
/ invest_InvestmentGeographicRegionAxis
= country_JP
 
Derivative, Fair Value, Net 0us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeOptionMember
/ invest_InvestmentGeographicRegionAxis
= country_JP
0us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_MacroHedgeProgramMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeOptionMember
/ invest_InvestmentGeographicRegionAxis
= country_JP
 
Customized Swaps [Member] | UNITED STATES | GMWB Hedging Instruments [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative, Notional Amount 7,041invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hig_CustomizedSwapsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
7,839invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hig_CustomizedSwapsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
 
Derivative, Fair Value, Net 124us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_CustomizedSwapsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
74us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_CustomizedSwapsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
 
Equity Swaps, Options and Futures [Member] | UNITED STATES | GMWB Hedging Instruments [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative, Notional Amount 3,761invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hig_EquitySwapsOptionsAndFuturesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
4,237invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hig_EquitySwapsOptionsAndFuturesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
 
Derivative, Fair Value, Net 39us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_EquitySwapsOptionsAndFuturesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
44us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_EquitySwapsOptionsAndFuturesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
 
Interest Rate Swaps and Futures [Member] | UNITED STATES | GMWB Hedging Instruments [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative, Notional Amount 3,640invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hig_InterestRateSwapsAndFuturesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
6,615invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= hig_InterestRateSwapsAndFuturesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
 
Derivative, Fair Value, Net 11us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_InterestRateSwapsAndFuturesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
(77)us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= hig_InterestRateSwapsAndFuturesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hig_GmwbHedgingInstrumentsMember
/ invest_InvestmentGeographicRegionAxis
= country_US
 
Lehman Brothers [Member] | Derivative [Member]      
Gain (Loss) Recognized within Net Realized Capital Gains (Losses) Footnote [Abstract]      
Gain (Loss) from Hedged Firm Commitment Not Qualifying as Fair Value Hedge, Net $ 13us-gaap_GainLossFromHedgedFirmCommitmentNotQualifyingAsFairValueHedgeNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_DerivativeMember
/ invest_InvestmentIssuerAxis
= hig_LehmanBrothersMember
$ 0us-gaap_GainLossFromHedgedFirmCommitmentNotQualifyingAsFairValueHedgeNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_DerivativeMember
/ invest_InvestmentIssuerAxis
= hig_LehmanBrothersMember
$ 9us-gaap_GainLossFromHedgedFirmCommitmentNotQualifyingAsFairValueHedgeNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_DerivativeMember
/ invest_InvestmentIssuerAxis
= hig_LehmanBrothersMember
[1] The associated liability is adjusted for changes in spot rates through realized capital gains and was $116, $250 and $189 for the years ended December 31, 2014, 2013 and 2012, respectively