Variable Interest Entities FV Options for consolidated CLOs (Details 4) - Variable Interest Entity, Primary Beneficiary [Member] - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Dec. 31, 2020
Syndicated loans
Unpaid principal balance		$ 2,690	$ 1,990
Excess unpaid principal over fair value		(50)	(81)
Fair value		2,640	1,909
Fair value of loans more than 90 days past due		1	5
Fair value of loans in nonaccrual status		15	19
Difference between fair value and unpaid principal of loans more than 90 days past due, loans in nonaccrual status or both		20	24
Debt [Abstract]
Unpaid principal balance		2,808	2,069
Fair Value, Option, Aggregate Differences, Long-term Debt Instruments		(137)	(156)
Debt Instrument, Fair Value Disclosure	[1]	2,671	1,913
Estimated fair value of CLO debt		2,700	$ 2,000
Debt issued		$ 817

[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 $2.7 billion and $2.0 billion as of March 31, 2021 and December 31, 2020, respectively.