Consolidated Investment Entities - Summary of the Components of the Consolidated Investment Entities (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Assets of Consolidated Investment Entities
Assets of Consolidated Investment Entities	$ 155,732	$ 169,051
Liabilities of Consolidated Investment Entities
Liabilities of Consolidated Investment Entities	147,467	158,821
Consolidated Investment Entities
Assets of Consolidated Investment Entities
Assets of Consolidated Investment Entities	2,155	2,226
Liabilities of Consolidated Investment Entities
Liabilities of Consolidated Investment Entities	1,040	1,126
VIEs
Assets of Consolidated Investment Entities
Assets of Consolidated Investment Entities	1,970	2,063
Liabilities of Consolidated Investment Entities
Liabilities of Consolidated Investment Entities	1,036	1,124
VIEs | Cash and cash equivalents
Assets of Consolidated Investment Entities
Assets of Consolidated Investment Entities	52	68
VIEs | Corporate loans, at fair value using the fair value option
Assets of Consolidated Investment Entities
Assets of Consolidated Investment Entities	432	513
VIEs | Limited partnerships/corporations, at fair value
Assets of Consolidated Investment Entities
Assets of Consolidated Investment Entities	1,470	1,470
VIEs | Other assets
Assets of Consolidated Investment Entities
Assets of Consolidated Investment Entities	16	12
VIEs | CLO notes, at fair value using the fair value option
Liabilities of Consolidated Investment Entities
Liabilities of Consolidated Investment Entities	368	474
VIEs | Other liabilities
Liabilities of Consolidated Investment Entities
Liabilities of Consolidated Investment Entities	668	650
VOEs
Assets of Consolidated Investment Entities
Assets of Consolidated Investment Entities	185	163
Liabilities of Consolidated Investment Entities
Liabilities of Consolidated Investment Entities	4	2
VOEs | Limited partnerships/corporations, at fair value
Assets of Consolidated Investment Entities
Assets of Consolidated Investment Entities	185	162
VOEs | Other assets
Assets of Consolidated Investment Entities
Assets of Consolidated Investment Entities	0	1
VOEs | Other liabilities
Liabilities of Consolidated Investment Entities
Liabilities of Consolidated Investment Entities	$ 4	$ 2