Related Party Relationship and Transactions - Summary of Related Party Transactions (Parenthetical) (Detail) - INR (₨) ₨ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
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| Disclosure of transactions between related parties [line items] | |||||
| Share based compensation | [1] | ₨ 4,465 | ₨ 5,542 | ₨ 5,590 | |
| Other benefits [member] | |||||
| Disclosure of transactions between related parties [line items] | |||||
| Share based compensation | ₨ 267 | ₨ 277 | 575 | ||
| Thierry Delaporte [member] | |||||
| Disclosure of transactions between related parties [line items] | |||||
| Cash compensation | 415 | ||||
| Cost of accelerated vesting towards unvested stock options | 310 | ||||
| Social security contributions | ₨ 196 | ||||
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