Leases - Schedule of Movement in Net Investment in Sublease ROU Asset (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2024 |
Mar. 31, 2023 |
Mar. 31, 2022 |
|
| Disclosure Of Movement In Net Investment In Sub Lease Of R O U Asset [Abstract] | |||
| Balance at the beginning | $ 44 | $ 49 | $ 53 |
| Additions | 1 | 1 | |
| Deletions | (42) | ||
| Interest income accrued during the period | 2 | 2 | |
| Lease receipts | (1) | (8) | (7) |
| Balance at the end | $ 1 | $ 44 | $ 49 |