Variable Interest Entities (FV Options for consolidated CDOs) (Details 4) - 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	Dec. 31, 2015
Fair value and unpaid principal balance of assets and liabilities carried at fair value under the fair value option
CLO debt valued using DCF model	$ 2,673			$ 2,673
Syndicated loans [Abstract]
Unpaid principal balance	2,682			2,682			$ 6,635
Excess estimated unpaid principal over fair value	(159)			(159)			(368)
Fair value	2,523			2,523			6,267
Fair value of loans more than 90 days past due	33			33			24
Fair value of loans in nonaccrual status	33			33			24
Difference between fair value and unpaid principal of loans more than 90 days past due, loans in nonaccrual status or both	79			79			72
Debt [Abstract]
Unpaid principal balance	2,916			2,916			7,063
Excess unpaid principal over fair value	(167)			(167)			(433)
Fair value	2,749	[1]		2,749	[1]		$ 6,630
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 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)		$ (12)	$ (5)		$ 29

[1] As the Company elected the measurement alternative effective January 1, 2016, the carrying value of the CLOs’ debt is set equal to the fair value of the CLOs’ assets. See Note 2 and above for additional discussion on the measurement alternative. The estimated fair value of the CLOs’ debt was $2.7 billion at June 30, 2016.