v3.25.4
Fair Value Measurements, Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Net Derivative Assets (Liabilities):      
Balance, beginning of period $ (4,803) $ (4,998) $ (3,797)
Net gains (losses) 867 (3,135) (2,915)
Purchases 8 11 17
Sales (4) (4) (7)
Settlements 760 3,357 3,150
Transfers into Level 3 (360) (260) (1,604)
Transfers out of Level 3 2,320 226 158
Balance, end of period (1,212) (4,803) (4,998)
Net unrealized gains (losses) related to assets and liabilities held at period end $ 374 $ (507) $ (179)
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 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 Net gains (losses) from trading and securities, Mortgage banking, Other
Interest rate contracts [Member]      
Net Derivative Assets (Liabilities):      
Balance, beginning of period $ (3,603) $ (3,567) $ (2,582)
Net gains (losses) 1,057 (2,820) (2,062)
Purchases 0 0 3
Sales 0 0 (3)
Settlements 489 2,802 2,548
Transfers into Level 3 (26) (9) (1,493)
Transfers out of Level 3 1,941 (9) 22
Balance, end of period (142) (3,603) (3,567)
Net unrealized gains (losses) related to assets and liabilities held at period end 351 (563) 93
Equity contracts [Member]      
Net Derivative Assets (Liabilities):      
Balance, beginning of period (1,167) (1,474) (1,224)
Net gains (losses) (372) (578) (801)
Purchases 2 0 0
Sales (2) 0 0
Settlements 555 857 521
Transfers into Level 3 (350) (204) (108)
Transfers out of Level 3 210 232 138
Balance, end of period (1,124) (1,167) (1,474)
Net unrealized gains (losses) related to assets and liabilities held at period end (71) 90 (314)
Other derivative contracts [Member]      
Net Derivative Assets (Liabilities):      
Balance, beginning of period (33) 43 9
Net gains (losses) 182 263 (52)
Purchases 6 11 14
Sales (2) (4) (4)
Settlements (284) (302) 81
Transfers into Level 3 16 (47) (3)
Transfers out of Level 3 169 3 (2)
Balance, end of period 54 (33) 43
Net unrealized gains (losses) related to assets and liabilities held at period end 94 (34) 42
Trading Assets, Debt Instruments [Member]      
Assets:      
Balance, beginning of period 144 234 210
Net gains (losses) (31) (7) (11)
Purchases 115 222 178
Sales (99) (217) (167)
Settlements (42) (60) (31)
Transfers into Level 3 108 155 151
Transfers out of Level 3 (33) (183) (96)
Balance, end of period 162 144 234
Net unrealized gains (losses) related to assets and liabilities held at period end (20) (13) (21)
Available-for-sale debt securities [Member]      
Assets:      
Balance, beginning of period 216 221 276
Net gains (losses) 7 18 (8)
Purchases 25 24 113
Sales (1) 0 (31)
Settlements (14) (18) (19)
Transfers into Level 3 0 1 304
Transfers out of Level 3 0 (30) (414)
Balance, end of period 233 216 221
Net unrealized gains (losses) related to assets and liabilities held at period end 6 20 (32)
Fair Value Disclosures, Textual [Abstract]      
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) 11 21 (27)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI 11 22 (28)
Mortgage servicing rights [Member] | Total Consumer [Member] | Residential mortgage [Member]      
Assets:      
Balance, beginning of period 6,844 7,468 9,310
Net gains (losses) (487) (406) (1,101)
Purchases 98 94 161
Sales (759) (312) (902)
Settlements 0 0 0
Transfers into Level 3 0 0 0
Transfers out of Level 3 0 0 0
Balance, end of period 5,696 6,844 7,468
Net unrealized gains (losses) related to assets and liabilities held at period end 257 492 86
Other assets and liabilities [Member]      
Assets and Liabilities:      
Balance, beginning of period 278 337 601
Net gains (losses) 0 146 131
Purchases 44 61 261
Sales 43 103 373
Settlements 16 49 100
Transfers into level 3 23 22 79
Transfers out of Level 3 64 136 262
Balance, end of period 222 278 337
Net unrealized gains (losses) related to assets and liabilities held at period end (3) 146 125
Fair Value Disclosures, Textual [Abstract]      
Fair Value, Recurring Basis, Unobservable Input Reconciliation, Asset (Liability), Gain (Loss), OCI (7) (14) (12)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI $ (7) $ (14) $ (12)