v3.25.2
Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Accumulated other comprehensive income (loss) [Roll Forward]        
Balance, beginning of period     $ 27,864  
Other comprehensive income (loss), net of taxes $ 483 $ (279) 882 $ (939)
Balance, end of period 29,518 24,862 29,518 24,862
Pre-tax components of other comprehensive income (loss) and the related income tax expense (benefit)        
Other comprehensive income (loss), before income taxes 569 (350) 1,067 (1,172)
Income tax expense (benefit) 86 (71) 185 (233)
Other comprehensive income (loss), net of taxes 483 (279) 882 (939)
Accumulated Other Comprehensive Income (Loss) [Member]        
Accumulated other comprehensive income (loss) [Roll Forward]        
Balance, beginning of period (4,568) (5,131) (4,967) (4,471)
Other comprehensive income (loss) before reclassifications, net of tax 470   844  
Amounts reclassified from accumulated other comprehensive income (loss), net of tax 13   38  
Other comprehensive income (loss), net of taxes 483 (279) 882 (939)
Balance, end of period (4,085) (5,410) (4,085) (5,410)
Pre-tax components of other comprehensive income (loss) and the related income tax expense (benefit)        
Other comprehensive income (loss), before income taxes 569 (350) 1,067 (1,172)
Income tax expense (benefit) 86 (71) 185 (233)
Other comprehensive income (loss), net of taxes 483 (279) 882 (939)
Changes in Net Unrealized Gains (Losses) on Investment Securities Having No Credit Losses Recognized in the Consolidated Statement of Income [Member]        
Accumulated other comprehensive income (loss) [Roll Forward]        
Balance, beginning of period (3,484)   (3,824)  
Other comprehensive income (loss) before reclassifications, net of tax 255   570  
Amounts reclassified from accumulated other comprehensive income (loss), net of tax 13   38  
Other comprehensive income (loss), net of taxes 268 (255) 608 (849)
Balance, end of period (3,216)   (3,216)  
Pre-tax components of other comprehensive income (loss) and the related income tax expense (benefit)        
Other comprehensive income (loss), before income taxes 341 (324) 777 (1,076)
Income tax expense (benefit) 73 (69) 169 (227)
Other comprehensive income (loss), net of taxes 268 (255) 608 (849)
Changes in Net Unrealized Gains (Losses) on Investment Securities Having Credit Losses Recognized in the Consolidated Statement of Income [Member]        
Accumulated other comprehensive income (loss) [Roll Forward]        
Balance, beginning of period 185   184  
Other comprehensive income (loss) before reclassifications, net of tax 0   1  
Amounts reclassified from accumulated other comprehensive income (loss), net of tax 0   0  
Other comprehensive income (loss), net of taxes 0 0 1 2
Balance, end of period 185   185  
Pre-tax components of other comprehensive income (loss) and the related income tax expense (benefit)        
Other comprehensive income (loss), before income taxes 0 1 1 3
Income tax expense (benefit) 0 1 0 1
Other comprehensive income (loss), net of taxes 0 0 1 2
Net Benefit Plan Assets and Obligations Recognized in Shareholders' Equity [Member]        
Accumulated other comprehensive income (loss) [Roll Forward]        
Balance, beginning of period (224)   (224)  
Other comprehensive income (loss) before reclassifications, net of tax 0   0  
Amounts reclassified from accumulated other comprehensive income (loss), net of tax 0   0  
Other comprehensive income (loss), net of taxes 0 (1) 0 (2)
Balance, end of period (224)   (224)  
Pre-tax components of other comprehensive income (loss) and the related income tax expense (benefit)        
Other comprehensive income (loss), before income taxes 0 (2) 0 (3)
Income tax expense (benefit) 0 (1) 0 (1)
Other comprehensive income (loss), net of taxes 0 (1) 0 (2)
Net Unrealized Foreign Currency Translation [Member]        
Accumulated other comprehensive income (loss) [Roll Forward]        
Balance, beginning of period (1,045)   (1,103)  
Other comprehensive income (loss) before reclassifications, net of tax 215   273  
Amounts reclassified from accumulated other comprehensive income (loss), net of tax 0   0  
Other comprehensive income (loss), net of taxes 215 (23) 273 (90)
Balance, end of period (830)   (830)  
Pre-tax components of other comprehensive income (loss) and the related income tax expense (benefit)        
Other comprehensive income (loss), before income taxes 228 (25) 289 (96)
Income tax expense (benefit) 13 (2) 16 (6)
Other comprehensive income (loss), net of taxes $ 215 $ (23) $ 273 $ (90)