Consolidated Investment Entities (Changes in Level 3 Assets and Liabilities) (Details 2) (Consolidated Investment Entities, USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
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	13,000,000		3,000,000		2,000,000		3,000,000
Total Gains (Losses) Included in Net Income-Assets	0	[1]	0		1,000,000	[1]	0
Total Gains (Losses) Included in Other Comprehensive loss-Assets	0		0		0		0
Purchases, Net-Assets	0		1,000,000		2,000,000		1,000,000
Sales, Net-Assets	(7,000,000)		(1,000,000)		(9,000,000)		(1,000,000)
Issues, Net-Liabilities	0				0		0
Settlements, Net-Assets	0		0		0		0
Transfers into Level 3	0		0		10,000,000		0
Transfers out of Level 3	(6,000,000)		0		(6,000,000)		0
Balance, at the end of the period			3,000,000				3,000,000
Changes in unrealized gains/ (losses) included in income relating to assets held	0	[1]	0
Common Stocks
Summary of changes in Level 3 assets held by consolidated investment entities
Balance, at the beginning of the period	10,000,000		8,000,000		14,000,000		14,000,000
Total Gains (Losses) Included in Net Income-Assets	0	[1]	1,000,000	[1]	2,000,000	[1]	1,000,000	[1]
Total Gains (Losses) Included in Other Comprehensive loss-Assets	0		0		0		0
Purchases, Net-Assets	0		0		0		0
Sales, Net-Assets	(2,000,000)		(3,000,000)		(2,000,000)		(3,000,000)
Issues, Net-Liabilities	0
Settlements, Net-Assets	0		0		0		0
Transfers into Level 3	5,000,000		13,000,000		11,000,000		15,000,000
Transfers out of Level 3	(6,000,000)		(3,000,000)		(18,000,000)		(11,000,000)
Balance, at the end of the period	7,000,000		16,000,000		7,000,000		16,000,000
Changes in unrealized gains/ (losses) included in income relating to assets held	0	[1]	(1,000,000)	[1]	1,000,000	[1]	(1,000,000)	[1]
Syndicated loans
Summary of changes in Level 3 assets held by consolidated investment entities
Balance, at the beginning of the period	384,000,000		205,000,000		368,000,000		202,000,000
Total Gains (Losses) Included in Net Income-Assets	2,000,000	[1]	1,000,000	[1]	6,000,000	[1]	1,000,000	[1]
Total Gains (Losses) Included in Other Comprehensive loss-Assets	0		0		0		0
Purchases, Net-Assets	142,000,000		117,000,000		238,000,000		193,000,000
Sales, Net-Assets	(27,000,000)		(26,000,000)		(27,000,000)		(44,000,000)
Issues, Net-Liabilities	0
Settlements, Net-Assets	(26,000,000)		(20,000,000)		(38,000,000)		(33,000,000)
Transfers into Level 3	98,000,000		76,000,000		244,000,000		127,000,000
Transfers out of Level 3	(146,000,000)		(61,000,000)		(364,000,000)		(154,000,000)
Balance, at the end of the period	427,000,000		292,000,000		427,000,000		292,000,000
Changes in unrealized gains/ (losses) included in income relating to assets held	1,000,000	[1]	0		2,000,000	[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	1,993,000,000		1,176,000,000		1,936,000,000		1,214,000,000
Total Gains (Losses) Included in Net Income-Assets	106,000,000	[2]	8,000,000	[2]	186,000,000	[2]	2,000,000	[2]
Total Gains (Losses) Included in Other Comprehensive loss-Assets	52,000,000		3,000,000		67,000,000		(74,000,000)
Purchases, Net-Assets	240,000,000		144,000,000		259,000,000		195,000,000
Sales, Net-Assets	(2,000,000)		(17,000,000)		(70,000,000)		(23,000,000)
Issues, Net-Liabilities	0
Settlements, Net-Assets	0		0		0		0
Transfers into Level 3	0		8,000,000		11,000,000		8,000,000
Transfers out of Level 3	0		0		0		0
Balance, at the end of the period	2,389,000,000		1,322,000,000		2,389,000,000		1,322,000,000
Changes in unrealized gains/ (losses) included in income relating to assets held	108,000,000	[2]	12,000,000	[2]	186,000,000	[2]	7,000,000	[2]
Debt
Summary of changes in Level 3 assets held by consolidated investment entities
Balance, at the beginning of the period	(5,225,000,000)		(4,595,000,000)		(4,804,000,000)		(4,450,000,000)
Total Gains (Losses) Included in Net Income-Liabilities	(15,000,000)	[1]	(61,000,000)	[1]	(25,000,000)	[1]	(88,000,000)	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)	0		0		0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	0		0		0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales	0		0		0		0
Issues, Net-Liabilities	(608,000,000)		(518,000,000)		(1,064,000,000)		(926,000,000)
Settlements, Net-Liabilities	337,000,000		497,000,000		382,000,000		787,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3	0		0		0		0
Balance, at the end of the period	(5,511,000,000)		(4,677,000,000)		(5,511,000,000)		(4,677,000,000)
Changes in unrealized gains/ (losses) included in income relating to liabilities held	19,000,000	[1]	(34,000,000)	[1]	10,000,000	[1]	(59,000,000)	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3	$ 0		$ 0		$ 0		$ 0

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

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