Variable Interest Entities and Securitization Activities - Fair Value of Transfers of Assets with Continuing Involvement (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Variable Interest Entity
Derivative assets	$ 66,250	$ 38,154
Derivative liabilities	48,262	34,568
SPE
Variable Interest Entity
Retained interests	617	618
Interests purchased in the secondary market	348	264
Derivative assets	1,259	891
Derivative liabilities	282	284
SPE | Investment grade
Variable Interest Entity
Retained interests	557	538
Interests purchased in the secondary market	259	169
SPE | Non-investment grade
Variable Interest Entity
Retained interests	60	80
Interests purchased in the secondary market	89	95
SPE | Level 2
Variable Interest Entity
Retained interests	581	576
Interests purchased in the secondary market	328	238
Derivative assets	1,259	891
Derivative liabilities	239	194
SPE | Level 2 | Investment grade
Variable Interest Entity
Retained interests	557	536
Interests purchased in the secondary market	257	168
SPE | Level 2 | Non-investment grade
Variable Interest Entity
Retained interests	24	40
Interests purchased in the secondary market	71	70
SPE | Level 3
Variable Interest Entity
Retained interests	36	42
Interests purchased in the secondary market	20	26
Derivative assets	0	0
Derivative liabilities	43	90
SPE | Level 3 | Investment grade
Variable Interest Entity
Retained interests	0	2
Interests purchased in the secondary market	2	1
SPE | Level 3 | Non-investment grade
Variable Interest Entity
Retained interests	36	40
Interests purchased in the secondary market	$ 18	$ 25