v3.25.4
Accumulated Other Comprehensive Income - Summary of Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Accumulated Other Comprehensive Income [Line Items]      
Amortization of amounts previously recorded upon transfer from available for sale, tax $ 1,205 $ 975 $ 1,549
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Balance at beginning of period 48,375 40,958 36,608
Other changes, net of tax expense (benefit) 3,865 3,283 4,490
Balance at end of period 49,425 48,375 40,958
AOCI Attributable to Parent      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Balance at beginning of period (14,848) (18,131) (22,621)
Other changes, net of tax expense (benefit) 3,865 3,283 4,490
Balance at end of period (10,983) (14,848) (18,131)
Available-for-Sale Securities, Excluding Transfers To (From) Held To Maturity      
Accumulated Other Comprehensive Income [Line Items]      
Net unrealized gain (loss), tax 657 447 886
Other reclassifications included in revenue, tax 19 9 15
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Net unrealized gain (loss) net of tax expense (benefit) 2,106 1,493 2,653
Other reclassifications included in revenue, net of tax expense (benefit) 60 31 46
Held-To-Maturity Securities      
Accumulated Other Comprehensive Income [Line Items]      
Amortization of amounts previously recorded upon transfer from available for sale, tax 520 517 657
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Other changes, net of tax expense (benefit) 1,667 1,762 1,817
Derivatives Designated as Cash Flow Hedging Instruments      
Accumulated Other Comprehensive Income [Line Items]      
Net unrealized gain (loss), tax (4)    
Other reclassifications included in revenue, tax 16    
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Net unrealized gain (loss) net of tax expense (benefit) (13)    
Other reclassifications included in revenue, net of tax expense (benefit) 50    
Other      
Accumulated Other Comprehensive Income [Line Items]      
Amortization of amounts previously recorded upon transfer from available for sale, tax (3) 2 (9)
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Other changes, net of tax expense (benefit) $ (5) $ (3) $ (26)