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Property and Equipment - Additional Information (Detail)
₨ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2020
INR (₨)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
INR (₨)
Mar. 31, 2018
INR (₨)
Property, Plant and Equipment [Line Items]        
Depreciation and amortization ₨ 12,800.3 $ 169.8 ₨ 12,247.8 ₨ 9,678.9