v3.26.1
Risk Management - Effect of Derivative Contracts on the Income Statement (Details) - Derivatives designated as hedging instruments - Derivatives in fair value hedging relationships - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Interest rate contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Location Interest, net Interest, net
Gain/(loss) recognized in income on derivatives $ (17) $ 80
Hedged fixed rate debt    
Derivative Instruments, Gain (Loss) [Line Items]    
Location Interest, net Interest, net
Gain/(loss) recognized in income on derivatives $ 16 $ (79)
Cumulative amount of fair value hedging adjustments to hedged fixed rate debt $ (117)