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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, 2020
INR (₨)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
INR (₨)
Mar. 31, 2018
INR (₨)
Disclosure of finance and other income and Foreign exchange gains/(losses), net [abstract]        
Interest income ₨ 21,764   ₨ 20,261 ₨ 17,806
Dividend income 367   361 609
Net gain from investments classified as FVTPL 1,275   1,990 5,410
Net gain from investments classified as FVTOCI 675   311 174
Finance and other income 24,081 $ 319 22,923 23,999
Foreign exchange gains/(losses), net, on financial instruments measured at FVTPL 2,144   1,251 (107)
Other Foreign exchange gains/(losses), net 1,025   1,964 1,595
Foreign exchange gains/(losses), net 3,169 $ 42 3,215 1,488
Finance and other income and Foreign exchange gains/(losses), net ₨ 27,250   ₨ 26,138 ₨ 25,487