Asset Management Fees - Asset Management Fees (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Asset management fees	$ 27	$ 21	$ 53	$ 55
CLOs
Disaggregation of Revenue [Line Items]
Asset management fees	9	8	17	17
Opportunity funds and liquid strategies
Disaggregation of Revenue [Line Items]
Asset management fees	1	8	4	12
Wind-down funds
Disaggregation of Revenue [Line Items]
Asset management fees	0	0	0	1
Asset Management Fees, CLO's
Disaggregation of Revenue [Line Items]
Asset management fees	10	16	21	30
Performance fees
Disaggregation of Revenue [Line Items]
Asset management fees	6	1	18	15
Reimbursable fund expenses
Disaggregation of Revenue [Line Items]
Asset management fees	$ 11	$ 4	$ 14	$ 10