Variable Interest Entities and Securitization Activities - Fair Value of Transfers of Assets with Continuing Involvement (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entity
Derivative assets	$ 55,081	$ 38,154
Derivative liabilities	39,854	34,568
SPE
Variable Interest Entity
Retained interests	657	618
Interests purchased in the secondary market	581	264
Derivative assets	1,225	891
Derivative liabilities	257	284
SPE | Investment grade
Variable Interest Entity
Retained interests	592	538
Interests purchased in the secondary market	487	169
SPE | Non-investment grade
Variable Interest Entity
Retained interests	65	80
Interests purchased in the secondary market	94	95
SPE | Level 2
Variable Interest Entity
Retained interests	617	576
Interests purchased in the secondary market	507	238
Derivative assets	1,225	891
Derivative liabilities	200	194
SPE | Level 2 | Investment grade
Variable Interest Entity
Retained interests	590	536
Interests purchased in the secondary market	443	168
SPE | Level 2 | Non-investment grade
Variable Interest Entity
Retained interests	27	40
Interests purchased in the secondary market	64	70
SPE | Level 3
Variable Interest Entity
Retained interests	40	42
Interests purchased in the secondary market	74	26
Derivative assets	0	0
Derivative liabilities	57	90
SPE | Level 3 | Investment grade
Variable Interest Entity
Retained interests	2	2
Interests purchased in the secondary market	44	1
SPE | Level 3 | Non-investment grade
Variable Interest Entity
Retained interests	38	40
Interests purchased in the secondary market	$ 30	$ 25