Goodwill and Other Intangible Assets - Schedule of Finite-lived Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 117	$ 0
Useful life	7 years
Finite-lived intangible assets, gross	$ 82	3
Accumulated amortization	(5)	(1)
Total	77	2
Licenses (indefinite-lived)	22	22
Total goodwill and other intangible assets	$ 216	24
CLO Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	8 years 9 months 18 days
Finite-lived intangible assets, gross	$ 42	0
Investment Management Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	4 years 6 months
Finite-lived intangible assets, gross	$ 24	0
CLO distribution network [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	4 years 9 months 18 days
Finite-lived intangible assets, gross	$ 9	0
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	9 years 9 months 18 days
Finite-lived intangible assets, gross	$ 3	0
Favorable Sublease [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	4 years 2 months 12 days
Finite-lived intangible assets, gross	$ 1	0
Lease Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	7 years
Finite-lived intangible assets, gross	$ 3	$ 3