Fair Value Measurements (Details 6) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Mar. 31, 2013		Mar. 31, 2012
Liabilities Held for Sale [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfer to from Liabilities Held for Sale	$ 0
Roll Forward of Financial Instruments (Liabilities) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair Value of Financial Instruments (Liabilities), Measured at Fair Value on a Recurring Basis, Beginning Balance									(28)
Total realized/unrealized gains (losses) included in net income	0	[1],[2],[3]
Total realized/unrealized gains (losses) included in OCI	(2)	[4]
Settlements	(1)
Fair Value of Financial Instruments (Liabilities), Measured at Fair Value on a Recurring Basis, Ending Balance	(31)				(31)				(28)
Changes in unrealized gains (losses) included in net income related to financial instruments still held at March 31, 2012	0	[3],[5]
Other policyholder funds and benefits payable [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfer to from Liabilities Held for Sale	0				43
Roll Forward of Financial Instruments (Liabilities) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair Value of Financial Instruments (Liabilities), Measured at Fair Value on a Recurring Basis, Beginning Balance					(3,127)		(5,785)		(1,688)		(5,153)	[1]
Total realized/unrealized gains (losses) included in net income	676	[1],[2],[3]	1,176	[1],[2],[3]	1,931		1,846	[1],[3]
Total realized/unrealized gains (losses) included in OCI	(9)	[4]	(76)	[1],[4]	197		26	[4]
Settlements	(45)		(65)	[1]	(110)		(205)
Fair Value of Financial Instruments (Liabilities), Measured at Fair Value on a Recurring Basis, Ending Balance	(1,066)		(4,118)	[1]	(1,066)		(4,118)	[1]	(1,688)		(5,153)	[1]
Changes in unrealized gains (losses) included in net income related to financial instruments still held at March 31, 2012	676	[3],[5]	1,176	[1],[3],[5]	1,931		1,846	[3],[5]
Other policyholder funds and benefits payable [Member] | Equity linked notes [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfer to from Liabilities Held for Sale	0				0
Roll Forward of Financial Instruments (Liabilities) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair Value of Financial Instruments (Liabilities), Measured at Fair Value on a Recurring Basis, Beginning Balance					(8)		(9)		(12)		(10)	[1]
Total realized/unrealized gains (losses) included in net income	(1)	[1],[2],[3]	0	[1],[2],[3]	(5)		(1)	[1],[3]
Total realized/unrealized gains (losses) included in OCI		[4]	0	[1],[4]	0		0	[4]
Settlements	0		0	[1]	0		0
Fair Value of Financial Instruments (Liabilities), Measured at Fair Value on a Recurring Basis, Ending Balance	(13)		(10)	[1]	(13)		(10)	[1]	(12)		(10)	[1]
Changes in unrealized gains (losses) included in net income related to financial instruments still held at March 31, 2012	(1)	[3],[5]	0	[1],[3],[5]	(5)		(1)	[3],[5]
Other policyholder funds and benefits payable [Member] | Liabilities Held for Sale [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfer to from Liabilities Held for Sale					(43)
Roll Forward of Financial Instruments (Liabilities) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair Value of Financial Instruments (Liabilities), Measured at Fair Value on a Recurring Basis, Beginning Balance					0
Total realized/unrealized gains (losses) included in net income					14
Total realized/unrealized gains (losses) included in OCI					1
Settlements					(3)
Fair Value of Financial Instruments (Liabilities), Measured at Fair Value on a Recurring Basis, Ending Balance	(31)				(31)
Changes in unrealized gains (losses) included in net income related to financial instruments still held at March 31, 2012					14
Other policyholder funds and benefits payable [Member] | Guaranteed Minimum Withdrawal Benefit [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfer to from Liabilities Held for Sale					43
Roll Forward of Financial Instruments (Liabilities) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair Value of Financial Instruments (Liabilities), Measured at Fair Value on a Recurring Basis, Beginning Balance					(3,119)		(5,776)	[5]	(1,676)	[5]	(5,143)	[1],[5]
Total realized/unrealized gains (losses) included in net income	677	[1],[2],[3],[5]	1,176	[1],[2],[3],[5]	1,936		1,847	[1],[3],[5]
Total realized/unrealized gains (losses) included in OCI	(9)	[4],[5]	(76)	[1],[4],[5]	197		26	[4],[5]
Settlements	(45)	[5]	(65)	[1],[5]	(110)		(205)	[5]
Fair Value of Financial Instruments (Liabilities), Measured at Fair Value on a Recurring Basis, Ending Balance	(1,053)	[5]	(4,108)	[1],[5]	(1,053)	[5]	(4,108)	[1],[5]	(1,676)	[5]	(5,143)	[1],[5]
Changes in unrealized gains (losses) included in net income related to financial instruments still held at March 31, 2012	677	[3],[5]	1,176	[1],[3],[5]	1,936		1,847	[3],[5]
Other Liabilities [Member]
Roll Forward of Financial Instruments (Liabilities) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair Value of Financial Instruments (Liabilities), Measured at Fair Value on a Recurring Basis, Beginning Balance							(9)				(29)	[1]
Total realized/unrealized gains (losses) included in net income			(14)	[1],[2],[3]			(34)	[1],[3]
Total realized/unrealized gains (losses) included in OCI			0	[4]			0	[4]
Settlements			0	[1]			0
Fair Value of Financial Instruments (Liabilities), Measured at Fair Value on a Recurring Basis, Ending Balance			(43)	[1]			(43)	[1]			(29)	[1]
Changes in unrealized gains (losses) included in net income related to financial instruments still held at March 31, 2012			(14)	[3],[5]			(34)	[3],[5]
Consumer Notes [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfer to from Liabilities Held for Sale	0				0
Roll Forward of Financial Instruments (Liabilities) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair Value of Financial Instruments (Liabilities), Measured at Fair Value on a Recurring Basis, Beginning Balance					(2)		(4)		(1)		(4)	[1]
Total realized/unrealized gains (losses) included in net income	0	[1],[2],[3]	2	[1],[2],[3]	1		2	[1],[3]
Total realized/unrealized gains (losses) included in OCI		[4]	0	[4]	0		0	[4]
Settlements	0		0	[1]	0		0
Fair Value of Financial Instruments (Liabilities), Measured at Fair Value on a Recurring Basis, Ending Balance	(1)		(2)	[1]	(1)		(2)	[1]	(1)		(4)	[1]
Changes in unrealized gains (losses) included in net income related to financial instruments still held at March 31, 2012	0	[3],[5]	2	[3],[5]	1		2	[3],[5]
Hartford Life and Annuity Insurance Company (HLAI) | White River Life Reinsurance [Member]
Roll Forward of Financial Instruments (Liabilities) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Reinsurance Recoverable Fair Value Disclosure	100		1,700		100		1,700
International [Member] | Other policyholder funds and benefits payable [Member] | Guaranteed Minimum Withdrawal Benefit [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfer to from Liabilities Held for Sale	$ 0

[1] The Company classifies gains and losses on GMWB reinsurance derivatives and Guaranteed Living Benefit embedded derivatives as unrealized gains (losses) for purposes of disclosure in this table because it is impracticable to track on a contract-by-contract basis the realized gains (losses) for these derivatives and embedded derivatives.

[2] Includes fair value of reinsurance recoverables of approximately $148 and $1.7 billion as of September 30, 2013 and 2012, respectively, related to a transaction entered into with an affiliated captive reinsurer. See Note 11 - Transactions with Affiliates of Notes to Condensed Consolidated Financial Statements for more information.

[3] All amounts in these rows are reported in net realized capital gains (losses). The realized/unrealized gains (losses) included in net income for separate account assets are offset by an equal amount for separate account liabilities, which results in a net zero impact on net income for the Company. All amounts are before income taxes and amortization of DAC.

[4] All amounts are before income taxes and amortization of DAC.

[5] Includes both market and non-market impacts in deriving realized and unrealized gains (losses).