Variable Interest Entities (Changes in Level 3 Assets and Liabilities) (Details 2) - Consolidated investment entities [Member] - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Summary of changes in Level 3 liabilities measured at fair value on a recurring basis [Rollforward]
Transfers from Level 1 to Level 2, assets		$ 0	$ 0	$ 0	$ 0
Transfers from Level 2 to Level 1, assets		0	0	0	0
Transfers from Level 1 to Level 2, liabilities		0	0	0	0
Transfers from Level 2 to Level 1, liabilities		0	0	0	0
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		2	11	3	7
Total gains (losses) included in net income	[1]				(1)
Transfers into Level 3				2	5
Transfers out of Level 3		(1)		(2)
Balance, at the end of the period		1	11	1	11
Changes in unrealized gains/ (losses) included in income relating to assets held at end of period	[1]				(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		300	467	529	484
Total gains (losses) included in net income	[1]	8	1	(1)
Purchases		35	119	50	156
Sales		(1)	(15)	(1)	(18)
Settlements		(15)	(42)	(25)	(73)
Transfers into Level 3		90	132	229	387
Transfers out of Level 3		(174)	(205)	(234)	(479)
Balance, at the end of the period		243	457	243	457
Changes in unrealized gains/ (losses) included in income relating to assets held at end of period	[1]	6		3	(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		0	1,889	2,065	1,935
Total gains (losses) included in net income	[2]	1	67	1	98
Total gains (losses) included in other comprehensive income (loss)			117		7
Purchases			4		346
Sales			(98)		(407)
Balance, at the end of the period		1	1,979	1	1,979
Changes in unrealized gains/ (losses) included in income relating to assets held at end of period	[2]		58
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			(5,933)	(6,630)	(6,030)
Total gains (losses) included in net income	[1]		(23)		29
Issues			(569)		(569)
Settlements			38		83
Balance, at the end of the period		$ 0	(6,487)	0	(6,487)
Changes in unrealized gains/ (losses) included in income relating to liabilities held at end of period	[1]		$ (23)		$ 29
Adjustments for New Accounting Pronouncement [Member] | 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	[3]			(2)
Adjustments for New Accounting Pronouncement [Member] | 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	[3]			(304)
Adjustments for New Accounting Pronouncement [Member] | 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	[3]			(2,065)
Adjustments for New Accounting Pronouncement [Member] | 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	[3]			6,630
Adjusted for change in accounting policies [Member] | 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				1
Adjusted for change in accounting policies [Member] | 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				225
Adjusted for change in accounting policies [Member] | 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				0
Adjusted for change in accounting policies [Member] | 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				$ 0

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

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

[3] The cumulative effect of change in accounting policies includes the adoption impact of ASU 2015-02 and ASU 2014-13 – Consolidation: Measuring the Financial Assets and the Financial Liabilities of a Consolidated Collateralized Financing Entity (“ASU 2014-13”).