v3.26.1
Financial Derivatives (Total Derivatives) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Derivative [Line Items]    
Derivative, notional amount $ 735,903 $ 714,038
Derivative asset, fair value 3,085 2,672
Derivative liability, fair value 4,009 3,626
Derivative asset, fair value offset amount 1,440 1,158
Derivative liability, fair value offset amount 1,440 1,158
Less: Cash collateral received/paid, derivative asset fair value 505 494
Less: Cash collateral received/paid, derivative liability fair value 747 743
Derivative assets, Net Fair Value 1,140 1,020
Derivative liabilities, Net Fair Value 1,822 1,725
Commodity contracts:    
Derivative [Line Items]    
Derivative asset, fair value 978 549
Derivative liability, fair value 953 522
Less: Cash collateral received/paid, derivative asset fair value 106 96
Less: Cash collateral received/paid, derivative liability fair value 66 8
Derivative assets, Net Fair Value 344 125
Derivative liabilities, Net Fair Value 251 209
Foreign exchange contracts and other    
Derivative [Line Items]    
Derivative asset, fair value 640 505
Derivative liability, fair value 537 584
Less: Cash collateral received/paid, derivative asset fair value 108 45
Less: Cash collateral received/paid, derivative liability fair value 80 119
Derivative assets, Net Fair Value 359 345
Derivative liabilities, Net Fair Value 210 227
Designated as Hedging Instruments under GAAP    
Derivative [Line Items]    
Derivative, notional amount 144,021 122,180
Derivative asset, fair value 37 0
Derivative liability, fair value 0 6
Designated as Hedging Instruments under GAAP | Fair value hedges | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 59,190 60,799
Derivative asset, fair value 0 0
Derivative liability, fair value 0 0
Designated as Hedging Instruments under GAAP | Cash flow hedges | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 83,382 59,994
Derivative asset, fair value 16 0
Derivative liability, fair value 0 0
Designated as Hedging Instruments under GAAP | Net investment hedges | Foreign Exchange Contract    
Derivative [Line Items]    
Derivative, notional amount 1,449 1,387
Derivative asset, fair value 21 0
Derivative liability, fair value 0 6
Not Designated as Hedging Instrument under GAAP    
Derivative [Line Items]    
Derivative, notional amount 591,882 591,858
Derivative asset, fair value 3,048 2,672
Derivative liability, fair value 4,009 3,620
Not Designated as Hedging Instrument under GAAP | Mortgage Banking | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 64,513 62,909
Derivative asset, fair value 100 94
Derivative liability, fair value 86 76
Not Designated as Hedging Instrument under GAAP | Mortgage Banking | Swaps | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 41,503 34,357
Derivative asset, fair value 0 0
Derivative liability, fair value 0 0
Not Designated as Hedging Instrument under GAAP | Mortgage Banking | Futures | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 6,635 9,915
Derivative asset, fair value 0 0
Derivative liability, fair value 0 0
Not Designated as Hedging Instrument under GAAP | Mortgage Banking | Mortgage-backed commitments | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 5,714 6,199
Derivative asset, fair value 73 69
Derivative liability, fair value 63 60
Not Designated as Hedging Instrument under GAAP | Mortgage Banking | Other | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 10,661 12,438
Derivative asset, fair value 27 25
Derivative liability, fair value 23 16
Not Designated as Hedging Instrument under GAAP | Customer Contracts    
Derivative [Line Items]    
Derivative, notional amount 506,930 510,396
Derivative asset, fair value 2,849 2,566
Derivative liability, fair value 3,854 3,383
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 443,420 454,338
Derivative asset, fair value 1,351 1,524
Derivative liability, fair value 2,433 2,444
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Commodity contracts:    
Derivative [Line Items]    
Derivative, notional amount 16,244 13,033
Derivative asset, fair value 978 549
Derivative liability, fair value 953 522
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Foreign exchange contracts and other    
Derivative [Line Items]    
Derivative, notional amount 47,266 43,025
Derivative asset, fair value 520 493
Derivative liability, fair value 468 417
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Swaps | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 394,936 409,522
Derivative asset, fair value 1,228 1,459
Derivative liability, fair value 2,328 2,383
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Swaps | Commodity contracts:    
Derivative [Line Items]    
Derivative, notional amount 6,108 5,129
Derivative asset, fair value 508 315
Derivative liability, fair value 483 288
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Futures | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 28 45
Derivative asset, fair value 0 0
Derivative liability, fair value 0 0
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Mortgage-backed commitments | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 7,049 8,278
Derivative asset, fair value 27 7
Derivative liability, fair value 15 12
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Other | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 41,407 36,493
Derivative asset, fair value 96 58
Derivative liability, fair value 90 49
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Other | Commodity contracts:    
Derivative [Line Items]    
Derivative, notional amount 10,136 7,904
Derivative asset, fair value 470 234
Derivative liability, fair value 470 234
Not Designated as Hedging Instrument under GAAP | Other Risk Management Activity | Foreign exchange contracts and other    
Derivative [Line Items]    
Derivative, notional amount 20,439 18,553
Derivative asset, fair value 99 12
Derivative liability, fair value $ 69 $ 161