Allowance for Credit Losses - Schedule of Allowance for Credit Losses on Unfunded Commitments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	$ 850	$ 189	$ 178	$ 225
Provision (benefit) for credit losses - unfunded commitments	60	(1)	566	(32)
Allowance for credit losses, ending balance	882	183	882	183
Financing assets (excluding leases)
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	81	11	12	13
Provision (benefit) for credit losses - unfunded commitments	10	0	79	(2)
Allowance for credit losses, ending balance	$ 91	$ 11	$ 91	$ 11