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Financial Instruments - Summary of Offsetting Other Financial Assets and Trade Payable and Other Liabilities (Detail) - INR (₨)
₨ in Millions
Mar. 31, 2020
Mar. 31, 2019
Disclosure of offsetting of financial assets liabilities [abstract]    
Gross amounts of recognized other financial assets ₨ 157,304 ₨ 154,129
Gross amounts of recognized financial liabilities set off in the balance sheet (7,077) (6,630)
Net amounts of recognized other financial assets presented in the balance sheet 150,227 147,499
Gross amounts of recognized trade payables and other payables 86,256 95,578
Financial liabilities Gross amounts of recognized financial liabilities set off in the balance sheet (7,077) (6,630)
Net amounts of recognized trade payables and other payables presented in the balance sheet ₨ 79,179 ₨ 88,948