Variable Interest Entities - Loans Sold to Third-Party Sponsored Securitization Entities (Details) - Nonconsolidated entities - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Summary of loan sale activities
Carrying value of loans sold	$ 10,721	$ 24,459	$ 34,389	$ 47,606
Proceeds received from loan sales as cash	4	24	13	40
Proceeds from loans sales as securities	10,551	24,033	33,809	46,782
Total proceeds received from loan sales	10,555	24,057	33,822	46,822
Gains/(losses) on loan sales	$ 0	$ 0	$ 0	$ 4