Transactions with Affiliates Level 4 (Details) (USD $)	3 Months Ended								12 Months Ended				9 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2014	Jan. 02, 2013	Apr. 30, 2014
Related Party Transaction [Line Items]
Assumed Premiums Earned									$ 74,000,000	$ 13,000,000	$ 8,000,000
Annuity Obligations	776,000,000				805,000,000				776,000,000	805,000,000
Recoverables for Hartford Fire Life, A&H, & Annuity, Contract Guarantees	0								0
Fixed annuities transfered from HLIKK to HLIC and HLAI					2,600,000,000					2,600,000,000
Net Amount at Risk by Product and Guarantee, Net Amount at Risk	3,493,000,000								3,493,000,000
Transfer of assets from HLIC and HLAI to HLIKK	1,600,000,000								1,600,000,000
Liabilities	182,484,000,000				194,476,000,000				182,484,000,000	194,476,000,000
Funds Held under Reinsurance Agreements, Liability														691,000,000
Schedule of Related Party Transactions [Abstract]
Premiums Earned, Net									32,000,000	184,000,000	93,000,000
Realized Investment Gains (Losses)									577,000,000	326,000,000	(1,481,000,000)
Total revenues	682,000,000	789,000,000	1,396,000,000	495,000,000	355,000,000	804,000,000	229,000,000	2,267,000,000	3,362,000,000	3,655,000,000	4,104,000,000
Policyholder Benefits and Claims Incurred, Net									1,460,000,000	1,758,000,000	2,900,000,000
Operating Expenses									851,000,000	(401,000,000)	268,000,000
Total benefits, losses and expenses	525,000,000	699,000,000	826,000,000	451,000,000	519,000,000	550,000,000	271,000,000	1,754,000,000	2,501,000,000	3,094,000,000	3,573,000,000
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest									861,000,000	561,000,000	531,000,000
Income Tax Expense (Benefit)									184,000,000	49,000,000	36,000,000	36,000,000
Income (loss) from discontinued operations, net of tax	0	0	0	0	(13,000,000)	(1,000,000)	(46,000,000)	19,000,000	0	(41,000,000)	61,000,000
Net income	130,000,000	91,000,000	399,000,000	57,000,000	(81,000,000)	201,000,000	(35,000,000)	386,000,000	677,000,000	471,000,000	556,000,000	556,000,000
Reinsurance Recoverables	20,053,000,000				19,794,000,000				20,053,000,000	19,794,000,000
Related Party Transaction, Expenses from Transactions with Related Party									347,000,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal									23,000,000	(1,491,000,000)	(61,000,000)
Disposal Group, Not Discontinued Operation, Gain (Loss) On Disposal, Net Of Tax									224,000,000
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Assumed Liability for Unpaid Claims and Claims Adjustment Expense	54,000,000								54,000,000
Assumed Premiums Earned									3,000,000	8,000,000	28,000,000
Hartford Life Insurance K.K. [Member]
Related Party Transaction [Line Items]
Liability for assumed GMDB Reinsurance					0					0
White River Life Reinsurance [Member]
Related Party Transaction [Line Items]
Loss on Contract Termination									213,000,000				213,000,000
Hartford Life and Annuity Insurance Company [Member]
Related Party Transaction [Line Items]
Funds Held under Reinsurance Agreements, Liability	310,000,000								310,000,000
Hartford Life and Annuity Insurance Company [Member] | White River Life Reinsurance [Member]
Schedule of Related Party Transactions [Abstract]
Premiums Earned, Net									(5,000,000)	(31,000,000)	(58,000,000)
Realized Investment Gains (Losses)									(103,000,000)	(1,665,000,000)	(2,130,000,000)
Total revenues									(108,000,000)	(1,696,000,000)	(2,188,000,000)
Policyholder Benefits and Claims Incurred, Net									(1,000,000)	(8,000,000)	(55,000,000)
Operating Expenses									(4,000,000)	(1,158,000,000)	(1,442,000,000)
Total benefits, losses and expenses									(5,000,000)	(1,166,000,000)	(1,497,000,000)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest									(103,000,000)	(530,000,000)	(691,000,000)
Income Tax Expense (Benefit)									(36,000,000)	(185,000,000)	(242,000,000)
Net income									(67,000,000)	(345,000,000)	(449,000,000)
Reinsurance Payable					129,000,000					129,000,000
Deposit Contracts, Liabilities					638,000,000					638,000,000
Hartford Life and Annuity Insurance Company [Member] | Guaranteed Minimum Income Benefit [Member] | Hartford Life Insurance K.K. [Member]
Related Party Transaction [Line Items]
Derivative Liability					500,000,000					500,000,000
Hartford Life and Annuity Insurance Company [Member] | Guaranteed Minimum Accumulation Benefit and Guaranteed Minimum Withdrawal Benefit [Member] | Hartford Life Liimited Ireland [Member]
Related Party Transaction [Line Items]
Derivative Liability					4,000,000					4,000,000
Hartford Life and Annuity Insurance Company [Member] | Guaranteed Minimum Death Benefit [Member] | Hartford Life Insurance K.K. [Member]
Related Party Transaction [Line Items]
Net Amount at Risk by Product and Guarantee, Net Amount at Risk					200,000,000					200,000,000
White River Life Reinsurance [Member]
Related Party Transaction [Line Items]
Surplus Notes															655,000,000
Capital															367,000,000
HLAI [Member]
Schedule of Related Party Transactions [Abstract]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal									344,000,000
Net Income Impact [Member]
Schedule of Related Party Transactions [Abstract]
Reinsurance Recoverables					495,000,000					495,000,000
Net Income Impact [Member] | Reinsurance Recoverables [Member] | Hartford Life and Annuity Insurance Company [Member] | White River Life Reinsurance [Member]
Schedule of Related Party Transactions [Abstract]
Reinsurance Payable	$ 0								$ 0