Variable Interest Entities (FV Option for Consolidated CLOs) (Details 4) - Consolidated investment entities [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
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	$ 2,300
Syndicated loans [Abstract]
Unpaid principal balance	2,281		$ 6,635
Excess estimated unpaid principal over fair value	(83)		(368)
Fair value	2,198		6,267
Fair value of loans more than 90 days past due	8		24
Fair value of loans in nonaccrual status	8		24
Difference between fair value and unpaid principal of loans more than 90 days past due, loans in nonaccrual status or both	34		72
Debt [Abstract]
Unpaid principal balance	2,459		7,063
Excess estimated unpaid principal over fair value	(140)		(433)
Fair value	2,319	[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 options was elected	$ 38		$ 35	$ 46

[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 3 and above for additional discussion on the measurement alternative. The estimated fair value of the CLOs’ debt was $2.3 billion at December 31, 2016.