Consolidated Investment Entities (Changes in Level 3 Assets and Liabilities) (Details 2) (Consolidated investment entities [Member], USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward]
Transfers between Level 1 and Level 2	$ 0		$ 0		$ 0		$ 0
Corporate debt securities [Member]
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period			3,000,000		2,000,000		3,000,000
Total gains (losses) included in net income					1,000,000	[1]
Purchases					2,000,000		1,000,000
Sales					(9,000,000)		(1,000,000)
Settlements			(1,000,000)				(1,000,000)
Transfers into Level 3					10,000,000
Transfers out of Level 3					(6,000,000)
Balance, at the end of the period	0		2,000,000		0		2,000,000
Common stocks [Member]
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period	7,000,000		16,000,000		14,000,000		14,000,000
Total gains (losses) included in net income			(1,000,000)	[1]	2,000,000	[1]
Sales					(2,000,000)		(3,000,000)
Transfers into Level 3	1,000,000				12,000,000		15,000,000
Transfers out of Level 3	(1,000,000)		(8,000,000)		(19,000,000)		(19,000,000)
Balance, at the end of the period	7,000,000		7,000,000		7,000,000		7,000,000
Changes in unrealized gains/ (losses) included in income relating to assets held at end of period			(1,000,000)	[1]	1,000,000	[1]	(2,000,000)	[1]
Syndicated loans [Member]
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period	427,000,000		292,000,000		368,000,000		202,000,000
Total gains (losses) included in net income	(1,000,000)	[1]	(1,000,000)	[1]	5,000,000	[1]
Purchases	41,000,000		72,000,000		280,000,000		265,000,000
Sales	(14,000,000)		(8,000,000)		(42,000,000)		(52,000,000)
Settlements	(38,000,000)		(13,000,000)		(76,000,000)		(46,000,000)
Transfers into Level 3	84,000,000		105,000,000		328,000,000		232,000,000
Transfers out of Level 3	(185,000,000)		(145,000,000)		(549,000,000)		(299,000,000)
Balance, at the end of the period	314,000,000		302,000,000		314,000,000		302,000,000
Changes in unrealized gains/ (losses) included in income relating to assets held at end of period	(1,000,000)	[1]	(2,000,000)	[1]	1,000,000	[1]	(1,000,000)	[1]
Other assets [Member]
Summary of changes in Level 3 assets measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period	2,389,000,000		1,322,000,000		1,936,000,000		1,214,000,000
Total gains (losses) included in net income	144,000,000	[2]	20,000,000	[2]	330,000,000	[2]	22,000,000	[2]
Total gains (losses) included in other comprehensive loss	(151,000,000)		73,000,000		(84,000,000)		(1,000,000)
Purchases	23,000,000		239,000,000		282,000,000		434,000,000
Sales	(388,000,000)		(54,000,000)		(458,000,000)		(77,000,000)
Transfers into Level 3					11,000,000		8,000,000
Transfers out of Level 3			(9,000,000)				(9,000,000)
Balance, at the end of the period	2,017,000,000		1,591,000,000		2,017,000,000		1,591,000,000
Changes in unrealized gains/ (losses) included in income relating to assets held at end of period	95,000,000	[2]	(1,000,000)	[2]	280,000,000	[2]	5,000,000	[2]
Debt [Member]
Summary of changes in Level 3 liabilities measured at fair value on a recurring basis [Rollforward]
Balance, at the beginning of the period	(5,511,000,000)		(4,677,000,000)		(4,804,000,000)		(4,450,000,000)
Total gains (losses) included in net income	(7,000,000)	[1]	50,000,000	[1]	(32,000,000)	[1]	(38,000,000)	[1]
Issues					(1,064,000,000)		(926,000,000)
Settlements	52,000,000		168,000,000		434,000,000		955,000,000
Balance, at the end of the period	(5,466,000,000)		(4,459,000,000)		(5,466,000,000)		(4,459,000,000)
Changes in unrealized gains/ (losses) included in income relating to liabilities held at end of period	$ (7,000,000)	[1]	$ 50,000,000	[1]	$ 3,000,000	[1]	$ (10,000,000)	[1]

[1] Included in net investment income in the Consolidated Statements of Operations.

[2] Included in other revenues in the Consolidated Statements of Operations.