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Accumulated Other Comprehensive Income - Reclassification Out of AOCI (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Securities gains, net | $ 10 | $ 10 | $ 17 | $ 23
Interest on securities | 444 | 461 | 1,354 | 1,374
Interest and fees on loans and leases | 1,909 | 1,910 | 5,604 | 5,640
Compensation and benefits | (685) | (690) | (2,132) | (2,099)
Other noninterest expense | 226 | 232 | 664 | 741
Income before income taxes | 837 | 728 | 2,298 | 2,151
Applicable income tax expense | (188) | (155) | (507) | (457)
Net Income | 649 | 573 | 1,791 | 1,694
Reclassification out of AOCI |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Net Income | (60) | (108) | (187) | (300)
Reclassification out of AOCI | Available-for-sale debt securities |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Securities gains, net | 0 | (11) | 0 | (17)
Income before income taxes | 0 | (11) | 0 | (17)
Applicable income tax expense | 0 | 2 | 0 | 4
Net Income | 0 | (9) | 0 | (13)
Reclassification out of AOCI | Available-for-sale debt securities transferred to held-to-maturity securities |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Interest on securities | (31) | (33) | (91) | (97)
Income before income taxes | (31) | (33) | (91) | (97)
Applicable income tax expense | 6 | 7 | 19 | 21
Net Income | (25) | (26) | (72) | (76)
Reclassification out of AOCI | Cash flow hedge derivatives |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Interest and fees on loans and leases | (43) | (91) | (149) | (270)
Income before income taxes | (43) | (91) | (149) | (270)
Applicable income tax expense | 10 | 21 | 36 | 62
Net Income | (33) | (70) | (113) | (208)
Reclassification out of AOCI | Net periodic benefit costs |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Compensation and benefits | (1) | (1) | (1) | (1)
Income before income taxes | (2) | (1) | (2) | (1)
Applicable income tax expense | 0 | 0 | 0 | 0
Net Income | (2) | (1) | (2) | (1)
Reclassification out of AOCI | Other |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Other noninterest expense | 0 | (2) | 0 | (2)
Income before income taxes | 0 | (2) | 0 | (2)
Applicable income tax expense | 0 | 0 | 0 | 0
Net Income | 0 | (2) | 0 | (2)
Reclassification out of AOCI | Settlements |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Compensation and benefits | $ (1) | $ 0 | $ (1) | $ 0

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