Allowance for Credit Losses - Schedule of Allowance for Investment Securities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	$ 1,605	$ 848	$ 922	$ 178
Provision for credit losses	151	42	934	506
Allowance for credit losses, ending balance	1,637	850	1,637	850
Available-for-Sale Securities
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	4	0	0	0
Provision for credit losses	(1)	0	3	0
Allowance for credit losses, ending balance	$ 3	$ 0	$ 3	$ 0