Variable Interest Entities and Securitization Activities - Fair Value of Transfers of Assets with Continuing Involvement (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Variable Interest Entity
Derivative assets	$ 36,790	$ 38,569
Derivative liabilities	42,025	37,930
SPE
Variable Interest Entity
Retained interests	1,526	1,201
Interests purchased in the secondary market	220	187
Derivative assets	1,522	1,408
Derivative liabilities	733	400
SPE \| Investment grade
Variable Interest Entity
Retained interests	1,346	1,080
Interests purchased in the secondary market	176	158
SPE \| Non-investment grade
Variable Interest Entity
Retained interests	180	121
Interests purchased in the secondary market	44	29
SPE \| Level 2
Variable Interest Entity
Retained interests	1,468	1,151
Interests purchased in the secondary market	198	176
Derivative assets	1,522	1,408
Derivative liabilities	733	400
SPE \| Level 2 \| Investment grade
Variable Interest Entity
Retained interests	1,346	1,080
Interests purchased in the secondary market	176	158
SPE \| Level 2 \| Non-investment grade
Variable Interest Entity
Retained interests	122	71
Interests purchased in the secondary market	22	18
SPE \| Level 3
Variable Interest Entity
Retained interests	58	50
Interests purchased in the secondary market	22	11
Derivative assets	0	0
Derivative liabilities	0	0
SPE \| Level 3 \| Investment grade
Variable Interest Entity
Retained interests	0	0
Interests purchased in the secondary market	0	0
SPE \| Level 3 \| Non-investment grade
Variable Interest Entity
Retained interests	58	50
Interests purchased in the secondary market	$ 22	$ 11