v3.26.1
Fair Value Measurements - Assets and Liabilities Recorded at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Equity securities $ 256 $ 243
Derivative assets 1,131 1,541
Securities available-for-sale 32,817 30,030
Equity securities measured at net asset value 19 17
Other 100 0
Trading liabilities 2,994 2,355
Derivative liabilities 1,825 1,018
Other liabilities 100 0
Trading assets 27,731 22,757
Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative asset before netting 16,052 13,650
Derivative asset, netting adjustment (14,921) (12,109)
Derivative assets 1,131 1,541
Loans held for sale, fair value 795 626
Equity securities measured at net asset value 107 112
Other 137 20
Total assets 76,866 65,960
Total assets 61,945 53,851
Domestic deposits 3,752 3,570
Trading liabilities 1,386 1,524
Derivative liability before netting 15,051 12,359
Derivative liability netting adjustment (13,226) (11,341)
Derivative liabilities 1,825 1,018
Long-term debt 8,692 8,266
Other liabilities 137 20
Total liabilities 29,018 25,739
Total liabilities 15,792 14,398
Fair Value, Recurring | Equity securities    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Equity securities 19,354 15,141
Fair Value, Recurring | Equity securities    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Equity securities 149 131
U.S. Treasury, U.S. Government agencies and sponsored enterprises | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Securities, trading 4,933 5,140
Securities available-for-sale 28,148 25,626
Debt securities issued by foreign entities    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Securities available-for-sale 4,382 4,141
Trading assets 1,422 914
Debt securities issued by foreign entities | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Securities, trading 1,422 914
Securities available-for-sale 4,382 4,141
Precious metals trading    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Trading liabilities 640 86
Trading assets 1,100 196
Precious metals trading | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Precious metals trading 1,100 196
Asset-backed securities | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Securities available-for-sale 287 263
Derivatives    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Trading liabilities 1,608 831
Trading assets 922 1,366
Derivatives | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Trading liabilities 1,608 831
Trading assets 922 1,366
Interest rate contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 785 786
Derivative liabilities 579 516
Foreign exchange contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 12,240 9,581
Derivative liabilities 11,632 8,924
Equity contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 1,703 1,259
Derivative liabilities 1,440 635
Precious metals contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 1,187 1,883
Derivative liabilities 1,193 2,050
Credit contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 133 137
Derivative liabilities 190 217
Other Contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 4 4
Derivative liabilities 17 17
Derivatives netting | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative asset before netting 0 0
Derivative asset, netting adjustment (14,921) (12,109)
Derivative assets (14,921) (12,109)
Derivative liability before netting 0 0
Derivative liability netting adjustment (13,226) (11,341)
Derivative liabilities (13,226) (11,341)
Level 1 | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative asset before netting 18 8
Loans held for sale, fair value 0 0
Equity securities measured at net asset value 0 0
Other 0 0
Total assets 45,486 38,195
Domestic deposits 0 0
Trading liabilities 746 1,438
Derivative liability before netting 16 7
Long-term debt 0 0
Other liabilities 0 0
Total liabilities 762 1,445
Level 1 | Fair Value, Recurring | Equity securities    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Equity securities 19,354 15,141
Level 1 | Fair Value, Recurring | Equity securities    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Equity securities 21 0
Level 1 | U.S. Treasury, U.S. Government agencies and sponsored enterprises | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Securities, trading 4,470 3,791
Securities available-for-sale 15,819 14,277
Level 1 | Debt securities issued by foreign entities | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Securities, trading 1,422 837
Securities available-for-sale 4,382 4,141
Level 1 | Precious metals trading | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Precious metals trading 0 0
Level 1 | Asset-backed securities | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Securities available-for-sale 0 0
Level 1 | Interest rate contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 18 8
Derivative liabilities 16 5
Level 1 | Foreign exchange contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities 0 0
Level 1 | Equity contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities 0 0
Level 1 | Precious metals contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities 0 2
Level 1 | Credit contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities 0 0
Level 1 | Other Contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities 0 0
Level 1 | Derivatives netting | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative asset before netting 0 0
Derivative liability before netting 0 0
Level 2 | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative asset before netting 15,803 13,543
Loans held for sale, fair value 531 460
Equity securities measured at net asset value 0 0
Other 137 20
Total assets 30,707 27,312
Domestic deposits 3,183 3,193
Trading liabilities 640 86
Derivative liability before netting 14,847 12,250
Long-term debt 5,940 5,912
Other liabilities 137 20
Total liabilities 24,747 21,461
Level 2 | Fair Value, Recurring | Equity securities    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Equity securities 0 0
Level 2 | Fair Value, Recurring | Equity securities    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Equity securities 128 131
Level 2 | U.S. Treasury, U.S. Government agencies and sponsored enterprises | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Securities, trading 463 1,349
Securities available-for-sale 12,329 11,349
Level 2 | Debt securities issued by foreign entities | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Securities, trading 0 77
Securities available-for-sale 0 0
Level 2 | Precious metals trading | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Precious metals trading 1,100 196
Level 2 | Asset-backed securities | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Securities available-for-sale 216 187
Level 2 | Interest rate contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 767 777
Derivative liabilities 561 509
Level 2 | Foreign exchange contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 12,231 9,572
Derivative liabilities 11,623 8,916
Level 2 | Equity contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 1,485 1,174
Derivative liabilities 1,280 561
Level 2 | Precious metals contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 1,187 1,883
Derivative liabilities 1,193 2,048
Level 2 | Credit contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 133 137
Derivative liabilities 190 216
Level 2 | Other Contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities 0 0
Level 2 | Derivatives netting | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative asset before netting 0 0
Derivative liability before netting 0 0
Level 3 | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative asset before netting 231 99
Loans held for sale, fair value 264 166
Equity securities measured at net asset value 0 0
Other 0 0
Total assets 566 341
Domestic deposits 569 377
Trading liabilities 0 0
Derivative liability before netting 188 102
Long-term debt 2,752 2,354
Other liabilities 0 0
Total liabilities 3,509 2,833
Level 3 | Fair Value, Recurring | Equity securities    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Equity securities 0 0
Level 3 | Fair Value, Recurring | Equity securities    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Equity securities 0 0
Level 3 | U.S. Treasury, U.S. Government agencies and sponsored enterprises | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Securities, trading 0 0
Securities available-for-sale 0 0
Level 3 | Debt securities issued by foreign entities | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Securities, trading 0 0
Securities available-for-sale 0 0
Level 3 | Precious metals trading | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Precious metals trading 0 0
Level 3 | Asset-backed securities | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Securities available-for-sale 71 76
Level 3 | Interest rate contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 0 1
Derivative liabilities 2 2
Level 3 | Foreign exchange contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 9 9
Derivative liabilities 9 8
Level 3 | Equity contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 218 85
Derivative liabilities 160 74
Level 3 | Precious metals contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities 0 0
Level 3 | Credit contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities 0 1
Level 3 | Other Contracts | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 4 4
Derivative liabilities 17 17
Level 3 | Derivatives netting | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative asset before netting 0 0
Derivative liability before netting $ 0 $ 0