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Accumulated Other Comprehensive Income - Schedule of Reclassifications Out of AOCI (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Interest income — Loans | $ 1,463 | $ 1,443 | $ 2,879 | $ 2,844
Interest expense — Long-term debt | (155) | (198) | (306) | (391)
Investment banking and debt placement fees | 169 | 178 | 366 | 353
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES | 647 | 539 | 1,305 | 1,054
Income taxes | 139 | 116 | 275 | 225
INCOME (LOSS) FROM CONTINUING OPERATIONS | 508 | 423 | 1,030 | 829
Other expense | (158) | (170) | (337) | (355)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized gains (losses) on derivative financial instruments |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Interest income — Loans | (28) | (90) | (64) | (183)
Interest expense — Long-term debt | 0 | (1) | (1) | (2)
Investment banking and debt placement fees | 1 | 0 | 1 | 0
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES | (27) | (91) | (64) | (185)
Income taxes | (7) | (22) | (15) | (45)
INCOME (LOSS) FROM CONTINUING OPERATIONS | (20) | (69) | (49) | (140)
Reclassification out of Accumulated Other Comprehensive Income | Net pension and postretirement benefit costs |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES | (2) | (2) | (4) | (2)
Income taxes | 0 | 0 | (1) | (1)
INCOME (LOSS) FROM CONTINUING OPERATIONS | (2) | (2) | (3) | (1)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of losses |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Other expense | (3) | (2) | (5) | (3)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of unrecognized prior service credit |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Other expense | $ 1 | $ 0 | $ 1 | $ 1

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