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Cash and Cash Equivalents - Summary of Cash and Cash Equivalents for the Purpose of Cash Flow Statement (Detail)
₨ in Millions, $ in Millions
Mar. 31, 2019
INR (₨)
Mar. 31, 2019
USD ($)
Mar. 31, 2018
INR (₨)
Mar. 31, 2018
USD ($)
Mar. 31, 2017
INR (₨)
Mar. 31, 2016
INR (₨)
Cash and cash equivalents [abstract]            
Cash and cash equivalents (as above) ₨ 158,529 $ 2,292 ₨ 44,925   ₨ 52,710  
Bank overdrafts (4)   (3,999)   (1,992)  
Total ₨ 158,525 $ 2,291 ₨ 40,926 $ 592 ₨ 50,718 ₨ 98,392