Related Party Transactions - Schedule of Related Party Transactions with Key Management Personnel (Parenthetical) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Whole Time Directors And Executive Officers | |||
| Disclosure Of Key Management Personnel Stock Compensation Expense [Line Items] | |||
| Employee stock compensation expense towards KMP | $ 8 | $ 8 | $ 6 |