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Goodwill and Intangible Assets - Additional Information (Detail)
12 Months Ended
Mar. 31, 2018
INR (₨)
Segments
Mar. 31, 2017
INR (₨)
Reconciliation of changes in goodwill [abstract]    
Number of operating segments | Segments 2  
Impairment of goodwill | ₨ ₨ 0 ₨ 0