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Accumulated Other Comprehensive Income (Loss) - Impact to Net Income for Items Reclassified out of Accumulated Other Comprehensive Income into Earnings (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 [Line Items] |  |  |  |
Securities gains (losses), net | $ (7) | $ (119) | $ (64) | $ (153)
Interest income | 7,927 | 8,086 | 23,047 | 23,835
Net interest income | 4,222 | 4,135 | 12,365 | 12,143
Other noninterest expense | (359) | (289) | (1,064) | (1,061)
Applicable income taxes | (524) | (350) | (1,439) | (1,142)
Net income | 2,008 | 1,722 | 5,545 | 4,659
Reclassification Out of Accumulated Other Comprehensive Income |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net income | (145) | (244) | (453) | (549)
Reclassification Out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Investment Securities Available-For-Sale |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Securities gains (losses), net | (7) | (119) | (64) | (153)
Applicable income taxes | 2 | 31 | 16 | 39
Net income | (5) | (88) | (48) | (114)
Reclassification Out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Investment Securities Transferred From Available-For-Sale to Held-To-Maturity |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Interest income | (124) | (132) | (358) | (377)
Applicable income taxes | 32 | 33 | 93 | 95
Net income | (92) | (99) | (265) | (282)
Reclassification Out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Derivative Hedges |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net interest income | (65) | (77) | (191) | (206)
Applicable income taxes | 16 | 20 | 48 | 53
Net income | (49) | (57) | (143) | (153)
Reclassification Out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Retirement Plans |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Other noninterest expense | 1 | 0 | 4 | 0
Applicable income taxes | 0 | 0 | (1) | 0
Net income | $ 1 | $ 0 | $ 3 | $ 0

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