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Fair Value Measurements Level 4 Fair Value Option (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value of Assets Accounted for Using Fair Value Option $ 280hlic_FairValueOfAssetsAccountedForUsingFairValueOption $ 791hlic_FairValueOfAssetsAccountedForUsingFairValueOption
Fair Value, Option, Changes in Fair Value, Gain (Loss) 32us-gaap_FairValueOptionChangesInFairValueGainLoss1 (110)us-gaap_FairValueOptionChangesInFairValueGainLoss1
Asset-backed Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value of Assets Accounted for Using Fair Value Option 13hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_AssetBackedSecuritiesMember		 3hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_AssetBackedSecuritiesMember
Corporate Debt Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value of Assets Accounted for Using Fair Value Option 96hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CorporateDebtSecuritiesMember		 84hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CorporateDebtSecuritiesMember
Fair Value, Option, Changes in Fair Value, Gain (Loss) (3)us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CorporateDebtSecuritiesMember		 (12)us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CorporateDebtSecuritiesMember
Collateralized Debt Obligations [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value of Assets Accounted for Using Fair Value Option 67hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CollateralizedDebtObligationsMember		 167hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CollateralizedDebtObligationsMember
Fair Value, Option, Changes in Fair Value, Gain (Loss) 21us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CollateralizedDebtObligationsMember		 14us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CollateralizedDebtObligationsMember
Commercial Mortgage Backed Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value of Assets Accounted for Using Fair Value Option 15hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember		 8hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
Foreign Government Debt Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value of Assets Accounted for Using Fair Value Option 3hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember		 494hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
Fair Value, Option, Changes in Fair Value, Gain (Loss) 16us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember		 (112)us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
Municipal Bonds [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value of Assets Accounted for Using Fair Value Option 2hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_MunicipalBondsMember		 1hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_MunicipalBondsMember
Residential Mortgage Backed Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value of Assets Accounted for Using Fair Value Option 82hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember		 9hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
Fair Value, Option, Changes in Fair Value, Gain (Loss) 0us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember		 0us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_ResidentialMortgageBackedSecuritiesMember
Fixed Maturities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) 34us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_FixedMaturitiesMember		 (110)us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_FixedMaturitiesMember
US Treasury and Government [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value of Assets Accounted for Using Fair Value Option 2hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USTreasuryAndGovernmentMember		 25hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_USTreasuryAndGovernmentMember
Equity Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value of Assets Accounted for Using Fair Value Option 248hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_EquitySecuritiesMember		 0hlic_FairValueOfAssetsAccountedForUsingFairValueOption
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_EquitySecuritiesMember
Fair Value, Option, Changes in Fair Value, Gain (Loss) (2)us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_EquitySecuritiesMember		 0us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= us-gaap_EquitySecuritiesMember
Fixed Maturities [Member] | CMBS Credit [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ 0us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= hlic_CmbsCreditMember
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_FixedMaturitiesMember		 $ 0us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= hlic_CmbsCreditMember
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_FixedMaturitiesMember