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Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail)
₨ in Millions, $ in Millions
Mar. 31, 2020
INR (₨)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
INR (₨)
Mar. 31, 2018
INR (₨)
Cash and cash equivalents [abstract]        
Cash and bank balances ₨ 34,087   ₨ 41,966 ₨ 23,300
Demand deposits with banks 110,412   116,563 21,625
Cash and cash equivalents ₨ 144,499 $ 1,917 ₨ 158,529 ₨ 44,925