v3.26.1
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 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]        
Securities gains (losses), net $ (49) $ (57) $ (84) $ (57)
Interest income 7,598 7,604 15,005 15,120
Net interest income 4,361 4,051 8,624 8,143
Other noninterest expense (397) (352) (738) (705)
Applicable income taxes (537) (472) (1,006) (915)
Net income 2,183 1,821 4,133 3,537
Reclassification Out of Accumulated Other Comprehensive Income        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Net income (147) (181) (274) (308)
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 (49) (57) (84) (57)
Applicable income taxes 12 14 21 14
Net income (37) (43) (63) (43)
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 (113) (123) (214) (234)
Applicable income taxes 28 33 54 61
Net income (85) (90) (160) (173)
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 (41) (66) (83) (126)
Applicable income taxes 10 17 21 32
Net income (31) (49) (62) (94)
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 7 2 14 3
Applicable income taxes (1) (1) (3) (1)
Net income $ 6 $ 1 $ 11 $ 2