Fair Value Measurements, Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis (Details) - USD ($)
$ in Millions |
3 Months Ended |
Mar. 31, 2026 |
Mar. 31, 2025 |
| Net Derivative Assets (Liabilities): |
|
|
| Balance, beginning of period |
$ (1,212)
|
$ (4,803)
|
| Net gains (losses) |
4
|
1,005
|
| Purchases |
2
|
2
|
| Sales |
(4)
|
0
|
| Settlements |
203
|
377
|
| Transfers into Level 3 |
(237)
|
(140)
|
| Transfers out of Level 3 |
149
|
9
|
| Balance, end of period |
(1,095)
|
(3,550)
|
| Net unrealized gains (losses) related to assets and liabilities held at period end |
$ 215
|
$ 1,256
|
| Fair Value Disclosures, Textual [Abstract] |
|
|
| Fair value, net derivative asset (liability), recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Net gains (losses) from trading and securities, Mortgage banking, Other
|
Net gains (losses) from trading and securities, Mortgage banking, Other
|
| Fair value, net derivative asset (liability), recurring basis, still held, unrealized gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Net gains (losses) from trading and securities, Mortgage banking, Other
|
Net gains (losses) from trading and securities, Mortgage banking, Other
|
| Interest rate contracts [Member] |
|
|
| Net Derivative Assets (Liabilities): |
|
|
| Balance, beginning of period |
$ (142)
|
$ (3,603)
|
| Net gains (losses) |
(163)
|
868
|
| Purchases |
0
|
0
|
| Sales |
0
|
0
|
| Settlements |
5
|
405
|
| Transfers into Level 3 |
0
|
0
|
| Transfers out of Level 3 |
29
|
0
|
| Balance, end of period |
(271)
|
(2,330)
|
| Net unrealized gains (losses) related to assets and liabilities held at period end |
(133)
|
1,210
|
| Equity contracts [Member] |
|
|
| Net Derivative Assets (Liabilities): |
|
|
| Balance, beginning of period |
(1,124)
|
(1,167)
|
| Net gains (losses) |
182
|
54
|
| Purchases |
0
|
0
|
| Sales |
0
|
0
|
| Settlements |
207
|
120
|
| Transfers into Level 3 |
(235)
|
(140)
|
| Transfers out of Level 3 |
137
|
9
|
| Balance, end of period |
(833)
|
(1,124)
|
| Net unrealized gains (losses) related to assets and liabilities held at period end |
347
|
110
|
| Other derivative contracts [Member] |
|
|
| Net Derivative Assets (Liabilities): |
|
|
| Balance, beginning of period |
54
|
(33)
|
| Net gains (losses) |
(15)
|
83
|
| Purchases |
2
|
2
|
| Sales |
(4)
|
0
|
| Settlements |
(9)
|
(148)
|
| Transfers into Level 3 |
(2)
|
0
|
| Transfers out of Level 3 |
(17)
|
0
|
| Balance, end of period |
9
|
(96)
|
| Net unrealized gains (losses) related to assets and liabilities held at period end |
1
|
(64)
|
| Trading assets, debt instruments [Member] |
|
|
| Assets: |
|
|
| Balance, beginning of period |
162
|
144
|
| Net gains (losses) |
(16)
|
(7)
|
| Purchases |
227
|
13
|
| Sales |
(229)
|
(7)
|
| Settlements |
(6)
|
(10)
|
| Transfers into Level 3 |
84
|
28
|
| Transfers out of Level 3 |
(7)
|
(8)
|
| Balance, end of period |
215
|
153
|
| Net unrealized gains (losses) related to assets and liabilities held at period end |
$ (15)
|
$ (7)
|
| Fair Value Disclosures, Textual [Abstract] |
|
|
| Fair value, asset, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Net gains (losses) from trading and securities
|
Net gains (losses) from trading and securities
|
| Fair value, asset, recurring basis, still held, unrealized gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Net gains (losses) from trading and securities
|
Net gains (losses) from trading and securities
|
| Available-for-sale debt securities [Member] |
|
|
| Assets: |
|
|
| Balance, beginning of period |
$ 233
|
$ 216
|
| Net gains (losses) |
(9)
|
1
|
| Purchases |
5
|
3
|
| Sales |
0
|
0
|
| Settlements |
(4)
|
(9)
|
| Transfers into Level 3 |
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
| Balance, end of period |
225
|
211
|
| Net unrealized gains (losses) related to assets and liabilities held at period end |
(8)
|
0
|
| Fair Value Disclosures, Textual [Abstract] |
|
|
| Fair value, measurement with unobservable inputs reconciliation, recurring basis, asset, gain (loss) included in other comprehensive income (loss) |
(9)
|
0
|
| Fair value, asset, recurring basis, still held, unrealized gain (loss), OCI |
$ (8)
|
$ 0
|
| Fair value, asset, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Net gains (losses) from trading and securities
|
Net gains (losses) from trading and securities
|
| Fair value, asset, recurring basis, still held, unrealized gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Net gains (losses) from trading and securities
|
Net gains (losses) from trading and securities
|
| Mortgage servicing rights [Member] | Total Consumer [Member] | Residential mortgage [Member] |
|
|
| Assets: |
|
|
| Balance, beginning of period |
$ 5,696
|
$ 6,844
|
| Net gains (losses) |
(106)
|
(257)
|
| Purchases |
17
|
25
|
| Sales |
1
|
(76)
|
| Settlements |
0
|
0
|
| Transfers into Level 3 |
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
| Balance, end of period |
5,608
|
6,536
|
| Net unrealized gains (losses) related to assets and liabilities held at period end |
$ 56
|
$ (68)
|
| Fair Value Disclosures, Textual [Abstract] |
|
|
| Fair value, asset, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Mortgage banking
|
Mortgage banking
|
| Fair value, asset, recurring basis, still held, unrealized gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Mortgage banking
|
Mortgage banking
|
| Other assets and liabilities [Member] |
|
|
| Assets and Liabilities: |
|
|
| Balance, beginning of period |
$ 222
|
$ 278
|
| Net gains (losses) |
(55)
|
(76)
|
| Purchases |
9
|
5
|
| Sales |
30
|
0
|
| Settlements |
3
|
3
|
| Transfers into level 3 |
9
|
5
|
| Transfers out of Level 3 |
2
|
46
|
| Balance, end of period |
150
|
163
|
| Net unrealized gains (losses) related to assets and liabilities held at period end |
(53)
|
(76)
|
| Fair Value Disclosures, Textual [Abstract] |
|
|
| Fair value, recurring basis, unobservable input reconciliation, asset (liability), gain (loss), OCI |
7
|
1
|
| Fair value, asset (liability), recurring basis, still held, unrealized gain (loss), OCI |
$ 7
|
$ 1
|
| Fair value, asset (liability), recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Mortgage banking, Other
|
Mortgage banking, Other
|
| Fair value, asset (liability), recurring basis, still held, unrealized gain (loss), statement of income or comprehensive income [Extensible Enumeration] |
Mortgage banking, Other
|
Mortgage banking, Other
|