Goodwill and Other Intangible Assets - Schedule of Finite-lived Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 117	$ 117
Useful life	4 years 7 months 6 days
Finite-lived intangible assets, gross	$ 82	82
Accumulated amortization	(42)	(30)
Finite-lived intangible assets, net	40	52
Indefinite-lived intangible assets (insurance licenses)	6	6
Total goodwill and other intangible assets	163	175
Goodwill deductible for tax purposes	$ 92	99
CLO contracts
Finite-Lived Intangible Assets [Line Items]
Useful life	5 years 9 months 18 days
Finite-lived intangible assets, gross	$ 42	42
Investment management contracts
Finite-Lived Intangible Assets [Line Items]
Useful life	1 year 6 months
Finite-lived intangible assets, gross	$ 24	24
CLO distribution network
Finite-Lived Intangible Assets [Line Items]
Useful life	1 year 9 months 18 days
Finite-lived intangible assets, gross	$ 9	9
Trade name
Finite-Lived Intangible Assets [Line Items]
Useful life	6 years 9 months 18 days
Finite-lived intangible assets, gross	$ 3	3
Favorable sublease
Finite-Lived Intangible Assets [Line Items]
Useful life	1 year 2 months 12 days
Finite-lived intangible assets, gross	$ 1	1
Lease-related intangibles
Finite-Lived Intangible Assets [Line Items]
Useful life	4 years 3 months 18 days
Finite-lived intangible assets, gross	$ 3	$ 3