Transactions with Affiliates (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Dec. 31, 2008	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Related Party Transaction [Line Items]
Reinsurance assumed risk			$ 4,082,000,000
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Assumed Liability for Unpaid Claims and Claims Adjustment Expense			0		53,000,000
Earned premiums	2,000,000		8,000,000	26,000,000
Payout annuity		2,200,000,000
Payout annuity, period		12 years
Hartford Life Insurance K.K. (HLIKK)
Related Party Transaction [Line Items]
Assumed Liability for Unpaid Claims and Claims Adjustment Expense			1,700,000,000		2,100,000,000
Hartford Life and Annuity Insurance Company (HLAI) | Hartford Life Liimited Ireland (HLL) | Guaranteed Minimum Death Benefit [Member]
Related Party Transaction [Line Items]
Assumed Liability for Unpaid Claims and Claims Adjustment Expense			4,000,000		5,000,000
Reinsurance assumed risk			26,000,000		42,000,000
Hartford Life and Annuity Insurance Company (HLAI) | Hartford Life Liimited Ireland (HLL) | Guaranteed Minimum Accumulation Benefit and Guaranteed Minimum Withdrawal Benefit [Member]
Related Party Transaction [Line Items]
Derivative fair value reported as labilities			(1,000,000)		0
Hartford Life and Annuity Insurance Company (HLAI) | Hartford Life Insurance K.K. (HLIKK) | Guaranteed Minimum Death Benefit [Member]
Related Party Transaction [Line Items]
Assumed Liability for Unpaid Claims and Claims Adjustment Expense			0		22,000,000
Reinsurance assumed risk			600,000,000		2,700,000,000
Hartford Life and Annuity Insurance Company (HLAI) | Hartford Life Insurance K.K. (HLIKK) | Guaranteed Minimum Income Benefit [Member]
Related Party Transaction [Line Items]
Derivative fair value reported as labilities			$ 800,000,000		$ 1,800,000,000