Consolidated Investment Entities (Details 2) (Consolidated Investment Entities, USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Summary of changes in Level 3 assets held by consolidated investment entities
Transfers between Level 1 and Level 2					$ 0
Corporate debt securities
Summary of changes in Level 3 assets held by consolidated investment entities
Balance, at the beginning of the period	3,000,000		4,000,000		3,000,000		4,000,000
Total Gains (Losses) Included in Net Income-Assets
Total Gains (Losses) Included in Other Comprehensive loss-Assets
Purchases, Net-Assets					1,000,000
Sales, Net-Assets					(1,000,000)
Issues, Net-Liabilities	0				0		0
Settlements, Net-Assets	(1,000,000)				(1,000,000)
Transfers into Level 3
Transfers out of Level 3
Balance, at the end of the period	2,000,000		4,000,000		2,000,000		4,000,000
Changes in unrealized gains/ (losses) included in income relating to assets held
Common Stocks
Summary of changes in Level 3 assets held by consolidated investment entities
Balance, at the beginning of the period	16,000,000		12,000,000		14,000,000		13,000,000
Total Gains (Losses) Included in Net Income-Assets	(1,000,000)	[1]					(1,000,000)	[1]
Total Gains (Losses) Included in Other Comprehensive loss-Assets
Purchases, Net-Assets							6,000,000
Sales, Net-Assets					(3,000,000)		(4,000,000)
Issues, Net-Liabilities	0				0		0
Settlements, Net-Assets
Transfers into Level 3			1,000,000		15,000,000		14,000,000
Transfers out of Level 3	(8,000,000)				(19,000,000)		(15,000,000)
Balance, at the end of the period	7,000,000		13,000,000		7,000,000		13,000,000
Changes in unrealized gains/ (losses) included in income relating to assets held	(1,000,000)	[1]			(2,000,000)	[1]
Syndicated loans
Summary of changes in Level 3 assets held by consolidated investment entities
Balance, at the beginning of the period	292,000,000		169,000,000		202,000,000		342,000,000
Total Gains (Losses) Included in Net Income-Assets	(1,000,000)	[1]	2,000,000	[1]			6,000,000	[1]
Total Gains (Losses) Included in Other Comprehensive loss-Assets
Purchases, Net-Assets	72,000,000		26,000,000		265,000,000		59,000,000
Sales, Net-Assets	(8,000,000)		(2,000,000)		(52,000,000)		(8,000,000)
Issues, Net-Liabilities	0				0		0
Settlements, Net-Assets	(13,000,000)		(22,000,000)		(46,000,000)		(84,000,000)
Transfers into Level 3	105,000,000		59,000,000		232,000,000		186,000,000
Transfers out of Level 3	(145,000,000)		(49,000,000)		(299,000,000)		(318,000,000)
Balance, at the end of the period	302,000,000		183,000,000		302,000,000		183,000,000
Changes in unrealized gains/ (losses) included in income relating to assets held	(2,000,000)	[1]	1,000,000	[1]	(1,000,000)	[1]
Other assets
Summary of changes in Level 3 assets held by consolidated investment entities
Balance, at the beginning of the period	1,322,000,000		1,080,000,000		1,214,000,000		1,108,000,000
Total Gains (Losses) Included in Net Income-Assets	20,000,000	[2]	(27,000,000)	[2]	22,000,000	[2]	(64,000,000)	[2]
Total Gains (Losses) Included in Other Comprehensive loss-Assets	73,000,000		21,000,000		(1,000,000)		20,000,000
Purchases, Net-Assets	239,000,000		146,000,000		434,000,000		254,000,000
Sales, Net-Assets	(54,000,000)		(62,000,000)		(77,000,000)		(160,000,000)
Issues, Net-Liabilities	0				0		0
Settlements, Net-Assets
Transfers into Level 3					8,000,000
Transfers out of Level 3	(9,000,000)				(9,000,000)
Balance, at the end of the period	1,591,000,000		1,158,000,000		1,591,000,000		1,158,000,000
Changes in unrealized gains/ (losses) included in income relating to assets held	(1,000,000)	[2]	(39,000,000)	[2]	5,000,000	[2]	(86,000,000)	[2]
Debt
Summary of changes in Level 3 assets held by consolidated investment entities
Balance, at the beginning of the period	(4,677,000,000)		(4,726,000,000)		(4,450,000,000)		(4,712,000,000)
Total Gains (Losses) Included in Net Income-Liabilities	50,000,000	[1]	(82,000,000)	[1]	(38,000,000)	[1]	(223,000,000)	[1]
Total Gains (Losses) Included in Other Comprehensive loss-Assets	0		0		0		0
Purchases, Net-Assets	0		0		0		0
Sales, Net-Assets	0		0		0		0
Issues, Net-Liabilities					(926,000,000)
Settlements, Net-Liabilities	168,000,000		117,000,000		955,000,000		244,000,000
Transfers into Level 3	0		0		0		0
Transfers out of Level 3	0		0		0		0
Balance, at the end of the period	(4,459,000,000)		(4,691,000,000)		(4,459,000,000)		(4,691,000,000)
Changes in unrealized gains/ (losses) included in income relating to liabilities held	$ 50,000,000	[1]	$ (81,000,000)	[1]	$ (10,000,000)	[1]	$ (221,000,000)	[1]

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

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