v3.26.1
Financial Derivatives (Total Derivatives) (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Derivative [Line Items]    
Derivative, notional amount $ 727,517 $ 714,038
Derivative asset, fair value 2,652 2,672
Derivative liability, fair value 4,052 3,626
Derivative asset, fair value offset amount 1,114 1,158
Derivative liability, fair value offset amount 1,114 1,158
Less: Cash collateral received/paid, derivative asset fair value 706 494
Less: Cash collateral received/paid, derivative liability fair value 698 743
Derivative assets, Net Fair Value 832 1,020
Derivative liabilities, Net Fair Value 2,240 1,725
Commodity contracts:    
Derivative [Line Items]    
Derivative asset, fair value 677 549
Derivative liability, fair value 654 522
Less: Cash collateral received/paid, derivative asset fair value 165 96
Less: Cash collateral received/paid, derivative liability fair value 4 8
Derivative assets, Net Fair Value 170 125
Derivative liabilities, Net Fair Value 275 209
Foreign exchange contracts and other    
Derivative [Line Items]    
Derivative asset, fair value 681 505
Derivative liability, fair value 634 584
Less: Cash collateral received/paid, derivative asset fair value 157 45
Less: Cash collateral received/paid, derivative liability fair value 47 119
Derivative assets, Net Fair Value 370 345
Derivative liabilities, Net Fair Value 303 227
Designated as Hedging Instruments under GAAP    
Derivative [Line Items]    
Derivative, notional amount 138,113 122,180
Derivative asset, fair value 15 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 58,364 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 78,277 59,994
Derivative asset, fair value 0 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 1,472 1,387
Derivative asset, fair value 15 0
Derivative liability, fair value 0 6
Not Designated as Hedging Instrument under GAAP    
Derivative [Line Items]    
Derivative, notional amount 589,404 591,858
Derivative asset, fair value 2,637 2,672
Derivative liability, fair value 4,052 3,620
Not Designated as Hedging Instrument under GAAP | Mortgage Banking | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 61,909 62,909
Derivative asset, fair value 68 94
Derivative liability, fair value 65 76
Not Designated as Hedging Instrument under GAAP | Mortgage Banking | Swaps | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 41,301 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 3,346 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 6,174 6,199
Derivative asset, fair value 49 69
Derivative liability, fair value 43 60
Not Designated as Hedging Instrument under GAAP | Mortgage Banking | Other | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 11,088 12,438
Derivative asset, fair value 19 25
Derivative liability, fair value 22 16
Not Designated as Hedging Instrument under GAAP | Customer Contracts    
Derivative [Line Items]    
Derivative, notional amount 509,852 510,396
Derivative asset, fair value 2,460 2,566
Derivative liability, fair value 3,862 3,383
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 444,605 454,338
Derivative asset, fair value 1,226 1,524
Derivative liability, fair value 2,699 2,444
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Commodity contracts:    
Derivative [Line Items]    
Derivative, notional amount 14,995 13,033
Derivative asset, fair value 677 549
Derivative liability, fair value 654 522
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Foreign exchange contracts and other    
Derivative [Line Items]    
Derivative, notional amount 50,252 43,025
Derivative asset, fair value 557 493
Derivative liability, fair value 509 417
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Swaps | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 392,910 409,522
Derivative asset, fair value 1,110 1,459
Derivative liability, fair value 2,579 2,383
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Swaps | Commodity contracts:    
Derivative [Line Items]    
Derivative, notional amount 6,045 5,129
Derivative asset, fair value 396 315
Derivative liability, fair value 374 288
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Futures | Interest rate contracts    
Derivative [Line Items]    
Derivative, notional amount 42 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 6,589 8,278
Derivative asset, fair value 8 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 45,064 36,493
Derivative asset, fair value 108 58
Derivative liability, fair value 105 49
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Other | Commodity contracts:    
Derivative [Line Items]    
Derivative, notional amount 8,950 7,904
Derivative asset, fair value 281 234
Derivative liability, fair value 280 234
Not Designated as Hedging Instrument under GAAP | Other Risk Management Activity | Foreign exchange contracts and other    
Derivative [Line Items]    
Derivative, notional amount 17,643 18,553
Derivative asset, fair value 109 12
Derivative liability, fair value $ 125 $ 161