Finance and Other Income and Foreign Exchange Gains/(Losses), Net - Summary of Finance and Other Income and Foreign Exchange Gains/(Losses), Net (Detail) ₨ in Millions, $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
|
Mar. 31, 2026
INR (₨)
|
Mar. 31, 2026
USD ($)
|
Mar. 31, 2025
INR (₨)
|
Mar. 31, 2024
INR (₨)
|
|
| Disclosure of finance and other income and Foreign exchange gains/(losses), net [abstract] | ||||
| Interest income | ₨ 28,367 | ₨ 27,210 | ₨ 19,478 | |
| Dividend income from equity investments designated as FVTOCI | 3 | 2,299 | 3 | |
| Net gain from investments classified as FVTPL | 7,763 | 8,765 | 4,558 | |
| Net loss from investments classified as FVTOCI | 358 | (72) | (143) | |
| Finance and other income | 36,491 | $ 389 | 38,202 | 23,896 |
| Foreign exchange gains/(losses), net, on financial instruments measured at FVTPL | (5,867) | (398) | 650 | |
| Other foreign exchange gains/(losses), net | 7,720 | 430 | (310) | |
| Foreign exchange gains/(losses), net | ₨ 1,853 | $ 20 | ₨ 32 | ₨ 340 |