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Property and Equipment - Additional Information (Detail)
₨ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2016
INR (₨)
Mar. 31, 2016
USD ($)
Mar. 31, 2015
INR (₨)
Mar. 31, 2014
INR (₨)
Property, Plant and Equipment [Line Items]        
Depreciation and amortization ₨ 7,427.5 $ 112.1 ₨ 6,905.8 ₨ 6,980.3