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, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Disclosure In Tabular Form Of Movement In Restricted Stock Units One [Line Items] | |||
| Options available to be granted, beginning of period | 164,883,974 | 175,923,152 | 194,218,000 |
| Equity shares allocated for grant under the plan | 0 | ||
| RSUs granted | (12,103,168) | (12,509,150) | (18,708,448) |
| Forfeited/lapsed | 1,771,614 | 1,469,972 | 413,600 |
| Options available to be granted, end of period | 154,552,420 | 164,883,974 | 175,923,152 |