v3.25.2
Derivative financial instruments - Information about Fair Values of Derivative Instruments in Consolidated Statement of Income (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items]        
Derivatives not designated as hedging instruments, derivatives $ 9 $ 7 $ 18 $ 14
Interest rate swap agreements | Fixed Rate Long-Term Borrowings | Designated as Hedging Instrument | Fair value hedges:        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative, gain (loss), statement of income or comprehensive income [extensible enumeration] Other costs of operations Other costs of operations Other costs of operations Other costs of operations
Derivatives in fair value hedging relationships, derivative $ 54 $ (18) $ 147 $ (78)
Derivatives in fair value hedging relationships, hedged item (55) 18 (147) 78
Interest Rate Contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivatives not designated as hedging instruments, derivatives 7 3 12 6
Foreign exchange and other option and futures contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivatives not designated as hedging instruments, derivatives $ 2 $ 4 $ 6 $ 8