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Additional Capital Disclosures - Summary of Capital Structure (Detail)
₨ in Millions, $ in Millions
Mar. 31, 2020
INR (₨)
Mar. 31, 2020
USD ($)
Apr. 01, 2019
INR (₨)
Mar. 31, 2019
INR (₨)
Mar. 31, 2018
INR (₨)
Capital structure [abstract]          
Equity attributable to the equity shareholders of the Company ₨ 557,458 $ 7,395   ₨ 568,116  
As percentage of total capital 85.00% 85.00%   85.00%  
Current loans, borrowings and bank overdrafts ₨ 73,202 $ 971   ₨ 71,099  
Long-term loans and borrowings 4,840 $ 64   28,368  
Lease liabilities 19,198   ₨ 15,379    
Total loans, borrowings and bank overdrafts and lease liabilities ₨ 97,240     ₨ 99,467 ₨ 138,259
As percentage of total capital 15.00% 15.00%   15.00%  
Total capital ₨ 654,698     ₨ 667,583  
Percentage of change, Equity attributable to the equity shareholders of the Company 1.88% 1.88%      
Percentage of change, Total loans and borrowings 2.24% 2.24%      
Percentage of change, Total capital (loans and borrowings and equity) 1.93% 1.93%