Variable Interest Entities and Securitization Activities - Assets and Liabilities by Type of Activity (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entity
VIE Assets	$ 1,173,776	$ 1,188,140
VIE Liabilities	1,071,114	1,081,542
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity
VIE Assets	2,800	2,912
VIE Liabilities	1,087	1,028
Variable Interest Entity, Primary Beneficiary | MABS
Variable Interest Entity
VIE Assets	1,027	1,177
VIE Liabilities	455	409
Variable Interest Entity, Primary Beneficiary | Investment vehicles
Variable Interest Entity
VIE Assets	636	717
VIE Liabilities	269	294
Variable Interest Entity, Primary Beneficiary | Operating entities
Variable Interest Entity
VIE Assets	509	508
VIE Liabilities	33	39
Variable Interest Entity, Primary Beneficiary | Other
Variable Interest Entity
VIE Assets	628	510
VIE Liabilities	$ 330	$ 286