Variable Interest Entities and Securitization Activities - Fair Value of Transfers of Assets with Continuing Involvement (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Variable Interest Entity
Derivative assets	$ 57,881	$ 38,154
Derivative liabilities	42,357	34,568
SPE
Variable Interest Entity
Retained interests	517	618
Interests purchased in the secondary market	353	264
Derivative assets	1,050	891
Derivative liabilities	185	284
SPE | Investment grade
Variable Interest Entity
Retained interests	461	538
Interests purchased in the secondary market	258	169
SPE | Non-investment grade
Variable Interest Entity
Retained interests	56	80
Interests purchased in the secondary market	95	95
SPE | Level 2
Variable Interest Entity
Retained interests	472	576
Interests purchased in the secondary market	310	238
Derivative assets	1,050	891
Derivative liabilities	140	194
SPE | Level 2 | Investment grade
Variable Interest Entity
Retained interests	461	536
Interests purchased in the secondary market	250	168
SPE | Level 2 | Non-investment grade
Variable Interest Entity
Retained interests	11	40
Interests purchased in the secondary market	60	70
SPE | Level 3
Variable Interest Entity
Retained interests	45	42
Interests purchased in the secondary market	43	26
Derivative assets	0	0
Derivative liabilities	45	90
SPE | Level 3 | Investment grade
Variable Interest Entity
Retained interests	0	2
Interests purchased in the secondary market	8	1
SPE | Level 3 | Non-investment grade
Variable Interest Entity
Retained interests	45	40
Interests purchased in the secondary market	$ 35	$ 25