Loans and Allowance for Credit Losses - Activity in the Allowance for Credit Losses for Loans Held for Investment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance			$ 87
Ending balance	$ 95		95
Leveraged Loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	61	$ 92	61	$ 97
Charge-offs	(3)	(1)	(4)	(1)
Provision	11	(19)	12	(20)
Foreign currency translation		2		(2)
Ending balance	69	74	69	74
Other Loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	11	12	12	17
Charge-offs	0	0	0	0
Provision	(1)	0	(2)	(5)
Foreign currency translation		0		0
Ending balance	10	12	10	12
Other Loans | Fund Finance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Ending balance	9	10	9	10
Other Loans | Other Loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Ending balance	1	2	1	2
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	14	14	14	8
Charge-offs	0	0	0	0
Provision	2	0	2	6
Foreign currency translation		0		0
Ending balance	16	14	16	14
Available-for-sale Securities
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	2		2
Charge-offs	0		0
Provision	0		0
Ending balance	2		2
Held-to-Maturity Securities
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		2		3
Charge-offs		0		0
Provision		0		(1)
Foreign currency translation		0		0
Ending balance		2		2
Off-Balance Sheet Commitments
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	19	15	19	22
Charge-offs	0	0	0	0
Provision	(2)	4	(2)	(3)
Foreign currency translation		0		0
Ending balance	17	19	17	19
All Other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	0	0	0	1
Charge-offs	0	0	0	0
Provision	0	0	0	(1)
Foreign currency translation		0		0
Ending balance	0	0	0	0
Total
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	107	135	108	148
Charge-offs	(3)	(1)	(4)	(1)
Provision	10	(15)	10	(24)
Foreign currency translation		2		(2)
Ending balance	$ 114	$ 121	$ 114	$ 121