Leases - Schedule of Movement in Lease Liabilities (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Disclosure Of Movement In Lease Liabilities [Abstract] | |||
| Balance at the beginning | $ 1,002 | $ 1,010 | $ 722 |
| Additions | 255 | 265 | 434 |
| Addition for Business Combination | 20 | ||
| Finance cost accrued during the period | 40 | 39 | 30 |
| Deletions | (65) | (53) | (6) |
| Payment of lease liabilities | (278) | (245) | (152) |
| Translation difference | (12) | (14) | (18) |
| Balance at the end | $ 962 | $ 1,002 | $ 1,010 |