v3.25.2
Shareholders' Equity - Adjustments to Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Class of Stock [Line Items]            
Income tax expense $ 196   $ 201   $ 374 $ 336
Net interest income (729)   (735)   (1,443) (1,451)
Compensation and employee benefits expenses (1,280)   (1,099)   (2,542) (2,351)
Net income (693) $ (644) (711) $ (463) (1,337) (1,174)
Amounts Reclassified into Earnings            
Class of Stock [Line Items]            
Net income 60   82   116 164
Amounts Reclassified into Earnings | Net Unrealized Gains (Losses) on Investment Securities            
Class of Stock [Line Items]            
Income tax expense 10   15   30 98
Net interest income 33   42   60 270
Amounts Reclassified into Earnings | Net Unrealized Gains (Losses) on Cash Flow Hedges            
Class of Stock [Line Items]            
Income tax expense 9   14   17 (38)
Net interest income $ 27   $ 40   56 (107)
Amounts Reclassified into Earnings | Amortization of Actuarial Losses            
Class of Stock [Line Items]            
Income tax expense         0 0
Compensation and employee benefits expenses         $ 0 $ 1