Gratuity and other post-employment benefit plans - Additional Information (Detail) - Defined Benefit Gratuity Plan [Member] |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Disclosure of Information About Defined Benefit Plans [Line Items] | |||
| Defined benefit plans number of days of salary | 15 days | ||
| Defined benefit plan minimum period to be considered for completed year of service | 6 months | ||
| Defined benefit plans minimum number of completion years of service | 5 years | ||
| Description of contractual agreement or stated policy for charging net defined benefit cost | Gratuity is computed as 15 days' salary, for every completed year of service or part thereof in excess of 6 months and is payable on retirement / termination / resignation. | ||
| Weighted average duration of defined benefit obligation | 5 years 21 days | 7 years 3 months 7 days | 7 years 11 months 1 day |