Variable Interest Entities (FV Options for consolidated CDOs) (Details 3) - Consolidated investment entities [Member] - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Fair value and unpaid principal balance of assets and liabilities carried at fair value under the fair value option
Estimated fair value of CLO debt		$ 2,300		$ 2,300		$ 2,300
Syndicated loans [Abstract]
Unpaid principal balance		2,248		2,248		2,281
Excess estimated unpaid principal over fair value		(58)		(58)		(83)
Fair value		2,190		2,190		2,198
Fair value of loans more than 90 days past due		11		11		8
Fair value of loans in nonaccrual status		11		11		8
Difference between fair value and unpaid principal of loans more than 90 days past due, loans in nonaccrual status or both		26		26		34
Debt [Abstract]
Unpaid principal balance		2,435		2,435		2,459
Excess unpaid principal over fair value		(127)		(127)		(140)
Carrying value	[1]	2,308		2,308		$ 2,319
Net investment income [Member]
Fair value and unpaid principal balance of assets and liabilities carried at fair value under the fair value option
Total net gains (losses) recognized in net investment income related to changes in the fair value of financial assets and liabilities for which the fair value option was elected		$ 1	$ (1)	$ (2)	$ (5)

[1] The carrying value of the CLOs’ debt is set equal to the fair value of the CLOs’ assets. The estimated fair value of the CLOs’ debt was $2.3 billion as of both June 30, 2017 and December 31, 2016.