Employee Benefits - Summary of Employee Benefit Costs (Detail) - INR (₨) ₨ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
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| Disclosure Of employee benefits cost [Line Items] | |||||
| Employee benefit cost | [1] | ₨ 555,855 | ₨ 533,477 | ₨ 549,301 | |
| Cost of revenues [member] | |||||
| Disclosure Of employee benefits cost [Line Items] | |||||
| Employee benefit cost | 480,122 | 452,800 | 459,466 | ||
| Selling and marketing expenses [member] | |||||
| Disclosure Of employee benefits cost [Line Items] | |||||
| Employee benefit cost | 43,060 | 47,788 | 51,224 | ||
| General and administrative expenses [member] | |||||
| Disclosure Of employee benefits cost [Line Items] | |||||
| Employee benefit cost | ₨ 32,673 | ₨ 32,889 | ₨ 38,611 | ||
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