Derivative Instruments - Income Statement Impact of Derivative Instruments (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Total loss on derivative instruments | $ (172) | $ (19) | $ (697) |
| Interest rate swaps | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Total loss on derivative instruments | (52) | 132 | 113 |
| Cross currency swaps | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Total loss on derivative instruments | $ (120) | $ (151) | $ (810) |