Fair Value Measurement - Fair Value Level 3 Rollforward Recurring Basis (Details) (USD $) In Millions, unless otherwise specified		3 Months Ended
	Dec. 31, 2013 Other invested assets	Mar. 31, 2014 Level 3 Obligations of state and political subdivisions		Mar. 31, 2013 Level 3 Obligations of state and political subdivisions		Mar. 31, 2014 Level 3 RMBS		Mar. 31, 2013 Level 3 RMBS		Mar. 31, 2014 Level 3 Asset-backed securities		Mar. 31, 2013 Level 3 Asset-backed securities		Mar. 31, 2014 Level 3 Corporate securities		Mar. 31, 2014 Level 3 Other invested assets		Mar. 31, 2013 Level 3 Other invested assets		Mar. 31, 2014 Level 3 FG VIEs' assets, at fair value		Mar. 31, 2013 Level 3 FG VIEs' assets, at fair value		Mar. 31, 2014 Level 3 Other assets		Mar. 31, 2013 Level 3 Other assets		Mar. 31, 2014 Level 3 Credit Derivative, Asset, Liability Net		Mar. 31, 2013 Level 3 Credit Derivative, Asset, Liability Net		Mar. 31, 2014 Level 3 FG VIEs' liabilities with recourse, at fair value		Mar. 31, 2013 Level 3 FG VIEs' liabilities with recourse, at fair value		Mar. 31, 2014 Level 3 FG VIEs' liabilities without recourse, at fair value		Mar. 31, 2013 Level 3 FG VIEs' liabilities without recourse, at fair value
Total pretax realized and unrealized gains/(losses) recorded in
Balance at the beginning of the period	$ 2	$ 36		$ 35		$ 290		$ 219		$ 268		$ 306		$ 136				$ 1		$ 2,565		$ 2,688		$ 46		$ 36		$ (1,693)	[1]	$ (1,793)		$ (1,790)		$ (2,090)		$ (1,081)		$ (1,051)
Net Income (loss)		1	[2],[3]	1	[2],[3]	4	[2],[3]	5	[2],[3]	7	[2],[3]	4	[2]	3	[2],[3]	0	[2],[4]	0	[2],[5]	82	[2],[5]	215	[2],[6]	(9)	[2],[6]	(10)	[1],[2],[7]	(211)	[1],[2],[7]	(592)	[2],[5]	(72)	[2],[5]	(81)	[2],[5]	(9)	[2],[5]	(74)
Other comprehensive income (loss)		1	[2]	0	[2]	14	[2]	7	[2]	8	[2]	(22)	[2]	4	[2]	1	[2]	0	[2]	0	[2]	0	[2]	0	[2]	0	[2]	0	[1],[2]	0	[2]	0	[2]	0	[2]	0	[2]	0	[2]
Purchases		0		0	[2]	53		3	[2]	0		0	[2]	0		45	[8]	0	[2]	0		0	[2]	0		0	[2]	0	[1]	0	[2]	0		0	[2]	0		0	[2]
Settlements		0		(1)	[2]	(15)		(11)	[2]	(31)		(2)	[2]	(5)		0		0	[2]	(286)		(138)	[2]	0		0	[2]	(19)	[1]	(8)	[2]	269		112	[2]	12		55	[2]
FG VIE Consolidations		0		0	[2]	0		(2)	[2]	0		0	[2]	0		0		0		0		48	[2]	0		0		0		0		0		(12)	[2]	0		(37)	[2]
FG VIE deconsolidations		0				13				0				0		0				(1,104)				0				0				247				977
Balance at the end of the period	2	38		35		359		221		252		286		138		48		1		1,257		2,813		37		26		(1,923)	[1]	(2,393)	[1]	(1,346)		(2,071)		(101)		(1,107)
Total pre-tax realized/unrealized gains/(losses) recorded in
Change in unrealized gains/(losses) related to financial instruments held at the reporting date		$ 1		$ 0		$ 15		$ 9		$ 7		$ (22)		$ 4		$ 1		$ 0		$ 25		$ 199		$ (9)		$ (10)	[1]	$ (232)	[1]	$ (611)		$ (28)		$ (83)		$ (10)		$ (94)

[1] Represents net position of credit derivatives. The consolidated balance sheet presents gross assets and liabilities based on net counterparty exposure.

[2] Realized and unrealized gains (losses) from changes in values of Level 3 financial instruments represent gains (losses) from changes in values of those financial instruments only for the periods in which the instruments were classified as Level 3.

[3] Included in net realized investment gains (losses) and net investment income.

[4] Reported in other income.

[5] Included in fair value gains (losses) on FG VIEs.

[6] Recorded in fair value gains (losses) on CCS.

[7] Reported in net change in fair value of credit derivatives.

[8] Non cash transaction.