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Financial Derivatives (Total Derivatives) (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Derivative [Line Items] |  |
Derivative, notional amount | $ 739,240 | $ 701,952
Derivative asset, fair value | 2,829 | 3,011
Derivative liability, fair value | 3,791 | 5,495
Derivative asset, fair value offset amount | 1,307 | 1,298
Derivative liability, fair value offset amount | 1,307 | 1,298
Less: Cash collateral received/paid, derivative asset fair value | 485 | 897
Less: Cash collateral received/paid, derivative liability fair value | 752 | 1,029
Derivative assets, Net Fair Value | 1,037 | 816
Derivative liabilities, Net Fair Value | 1,732 | 3,168
Commodity contracts: |  |
Derivative [Line Items] |  |
Derivative asset, fair value | 560 | 521
Derivative liability, fair value | 534 | 496
Less: Cash collateral received/paid, derivative asset fair value | 88 | 85
Less: Cash collateral received/paid, derivative liability fair value | 4 | 2
Derivative assets, Net Fair Value | 84 | 140
Derivative liabilities, Net Fair Value | 157 | 101
Foreign exchange contracts and other |  |
Derivative [Line Items] |  |
Derivative asset, fair value | 524 | 561
Derivative liability, fair value | 657 | 513
Less: Cash collateral received/paid, derivative asset fair value | 48 | 183
Less: Cash collateral received/paid, derivative liability fair value | 116 | 8
Derivative assets, Net Fair Value | 342 | 219
Derivative liabilities, Net Fair Value | 277 | 332
Designated as Hedging Instruments under GAAP |  |
Derivative [Line Items] |  |
Derivative, notional amount | 118,155 | 130,740
Derivative asset, fair value | 14 | 163
Derivative liability, fair value | 82 | 170
Designated as Hedging Instruments under GAAP | Fair value hedges | Interest rate contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 61,253 | 53,750
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 | 55,658 | 50,721
Derivative asset, fair value | 14 | 0
Derivative liability, fair value | 0 | 2
Designated as Hedging Instruments under GAAP | Cash flow hedges | Other | Interest rate contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 0 | 25,000
Derivative asset, fair value | 0 | 149
Derivative liability, fair value | 0 | 168
Designated as Hedging Instruments under GAAP | Net investment hedges | Foreign Exchange Contract |  |
Derivative [Line Items] |  |
Derivative, notional amount | 1,244 | 1,269
Derivative asset, fair value | 0 | 14
Derivative liability, fair value | 82 | 0
Not Designated as Hedging Instrument under GAAP |  |
Derivative [Line Items] |  |
Derivative, notional amount | 621,085 | 571,212
Derivative asset, fair value | 2,815 | 2,848
Derivative liability, fair value | 3,709 | 5,325
Not Designated as Hedging Instrument under GAAP | Mortgage Banking | Interest rate contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 78,471 | 63,816
Derivative asset, fair value | 104 | 92
Derivative liability, fair value | 79 | 79
Not Designated as Hedging Instrument under GAAP | Mortgage Banking | Swaps | Interest rate contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 48,423 | 35,941
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 | 11,179 | 9,962
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 | 6,573 | 4,815
Derivative asset, fair value | 68 | 73
Derivative liability, fair value | 59 | 66
Not Designated as Hedging Instrument under GAAP | Mortgage Banking | Other | Interest rate contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 12,296 | 13,098
Derivative asset, fair value | 36 | 19
Derivative liability, fair value | 20 | 13
Not Designated as Hedging Instrument under GAAP | Customer Contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 518,065 | 496,365
Derivative asset, fair value | 2,666 | 2,612
Derivative liability, fair value | 3,461 | 5,097
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Interest rate contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 465,901 | 442,415
Derivative asset, fair value | 1,627 | 1,688
Derivative liability, fair value | 2,521 | 4,237
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Commodity contracts: |  |
Derivative [Line Items] |  |
Derivative, notional amount | 14,167 | 15,221
Derivative asset, fair value | 560 | 521
Derivative liability, fair value | 534 | 496
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Foreign exchange contracts and other |  |
Derivative [Line Items] |  |
Derivative, notional amount | 37,997 | 38,729
Derivative asset, fair value | 479 | 403
Derivative liability, fair value | 406 | 364
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Swaps | Interest rate contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 420,990 | 406,747
Derivative asset, fair value | 1,542 | 1,544
Derivative liability, fair value | 2,450 | 4,130
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Swaps | Commodity contracts: |  |
Derivative [Line Items] |  |
Derivative, notional amount | 5,301 | 6,725
Derivative asset, fair value | 283 | 313
Derivative liability, fair value | 257 | 288
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Futures | Interest rate contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 40 | 113
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 | 7,520 | 3,275
Derivative asset, fair value | 10 | 21
Derivative liability, fair value | 8 | 7
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Other | Interest rate contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 37,351 | 32,280
Derivative asset, fair value | 75 | 123
Derivative liability, fair value | 63 | 100
Not Designated as Hedging Instrument under GAAP | Customer Contracts | Other | Commodity contracts: |  |
Derivative [Line Items] |  |
Derivative, notional amount | 8,866 | 8,496
Derivative asset, fair value | 277 | 208
Derivative liability, fair value | 277 | 208
Not Designated as Hedging Instrument under GAAP | Other Risk Management Activity | Foreign exchange contracts and other |  |
Derivative [Line Items] |  |
Derivative, notional amount | 24,549 | 11,031
Derivative asset, fair value | 45 | 144
Derivative liability, fair value | $ 169 | $ 149

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