v3.26.1
Derivative Instruments - Summary of Income Statement Impact of Derivative Instruments (Detail) - USD ($)
$ in Millions
 3 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]    
Total gain/(loss) on derivative instruments $ (43) $ 744
Interest rate swaps    
Derivative Instruments, Gain (Loss) [Line Items]    
Total gain/(loss) on derivative instruments (2) 18
Cross currency swaps    
Derivative Instruments, Gain (Loss) [Line Items]    
Total gain/(loss) on derivative instruments $ (41) $ 726