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Consolidated Statement of Cash Flows (Parenthetical) - INR (₨)
₨ in Millions
12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2016
Statement of cash flows [abstract]      
Taxes paid ₨ 28,105 ₨ 26,347 ₨ 26,935