Stock - Summary Of Activity in the RSU's outstanding under the various Employees' Stock Incentive Master Scheme (Detail) - Restricted Stock Units (RSUs) [Member] - Employee Stock Incentive Master Scheme Two Thousand And Twenty Two [Member] - shares |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Disclosure In Tabular Form Of Movement In Restricted Stock Units One [Line Items] | |||
| Options available to be granted, beginning of period | 87,961,576 | 97,109,000 | 0 |
| Equity shares allocated for grant under the plan | 0 | 0 | 100,000,000 |
| Options granted | (6,254,575) | (9,354,224) | (2,891,000) |
| Forfeited/lapsed | 734,986 | 206,800 | 0 |
| Options available to be granted, end of period | 82,441,987 | 87,961,576 | 97,109,000 |