v3.26.1
Accumulated Other Comprehensive Loss - Schedule of Reclassification Out of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Other comprehensive income (loss), before tax $ 17 $ 868
Other comprehensive income (loss), tax effect (4) (206)
Other comprehensive income (loss), net of tax 13 662
Available-for-sale securities    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Net unrealized losses arising during the period, before tax (4) 346
Net unrealized losses arising during the period, tax 1 (81)
Net unrealized losses arising during the period, net of tax (3) 265
Reclassification from AOCI, before tax 3 (495)
Reclassification from AOCI, tax (1) 118
Reclassification from AOCI, net of tax 2 (377)
Other comprehensive income (loss), before tax (7) 841
Other comprehensive income (loss), tax effect 2 (199)
Other comprehensive income (loss), net of tax (5) 642
Held-to-maturity securities    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Reclassification from AOCI, before tax (19) (20)
Reclassification from AOCI, tax 5 5
Reclassification from AOCI, net of tax (14) (15)
Other comprehensive income (loss), net of tax 14 15
Translation adjustments    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Other comprehensive income (loss), before tax (3)  
Other comprehensive income (loss), tax effect 1  
Other comprehensive income (loss), net of tax (2)  
Net investment hedges    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Other comprehensive income (loss), before tax 3  
Other comprehensive income (loss), tax effect (1)  
Other comprehensive income (loss), net of tax 2  
Cash flow hedges    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Reclassification from AOCI, before tax (5) (7)
Reclassification from AOCI, tax 1 2
Reclassification from AOCI, net of tax (4) (5)
Other comprehensive income (loss), before tax 5 7
Other comprehensive income (loss), tax effect (1) (2)
Other comprehensive income (loss), net of tax $ 4 $ 5