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Reinsurance Level 4 Reinsurance Revenues (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]      
Assumed Premiums Earned $ 74us-gaap_AssumedPremiumsEarned $ 13us-gaap_AssumedPremiumsEarned $ 8us-gaap_AssumedPremiumsEarned
Ceded Premiums Earned 2,060us-gaap_CededPremiumsEarned 1,869us-gaap_CededPremiumsEarned 698us-gaap_CededPremiumsEarned
Life Annuity Accident and Health Insurance Product Line [Member]      
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]      
Gross Fee Income Earned Premium and Other Life 3,228hlic_GrossFeeIncomeEarnedPremiumAndOtherLife
/ us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis
= hlic_LifeAnnuityAccidentandHealthInsuranceProductLineMember		 3,502hlic_GrossFeeIncomeEarnedPremiumAndOtherLife
/ us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis
= hlic_LifeAnnuityAccidentandHealthInsuranceProductLineMember		 3,739hlic_GrossFeeIncomeEarnedPremiumAndOtherLife
/ us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis
= hlic_LifeAnnuityAccidentandHealthInsuranceProductLineMember
Assumed Premiums Earned 74us-gaap_AssumedPremiumsEarned
/ us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis
= hlic_LifeAnnuityAccidentandHealthInsuranceProductLineMember		 13us-gaap_AssumedPremiumsEarned
/ us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis
= hlic_LifeAnnuityAccidentandHealthInsuranceProductLineMember		 8us-gaap_AssumedPremiumsEarned
/ us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis
= hlic_LifeAnnuityAccidentandHealthInsuranceProductLineMember
Ceded Premiums Earned 2,060us-gaap_CededPremiumsEarned
/ us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis
= hlic_LifeAnnuityAccidentandHealthInsuranceProductLineMember		 1,869us-gaap_CededPremiumsEarned
/ us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis
= hlic_LifeAnnuityAccidentandHealthInsuranceProductLineMember		 698us-gaap_CededPremiumsEarned
/ us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis
= hlic_LifeAnnuityAccidentandHealthInsuranceProductLineMember
Net Fee Income Earned Premium and Other Life $ 1,242hlic_NetFeeIncomeEarnedPremiumAndOtherLife
/ us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis
= hlic_LifeAnnuityAccidentandHealthInsuranceProductLineMember		 $ 1,646hlic_NetFeeIncomeEarnedPremiumAndOtherLife
/ us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis
= hlic_LifeAnnuityAccidentandHealthInsuranceProductLineMember		 $ 3,049hlic_NetFeeIncomeEarnedPremiumAndOtherLife
/ us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAxis
= hlic_LifeAnnuityAccidentandHealthInsuranceProductLineMember