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Financial Instruments - Summary of Financial Assets and Liabilities (Detail)
₨ in Millions, $ in Millions
Mar. 31, 2020
INR (₨)
Mar. 31, 2020
USD ($)
Oct. 10, 2019
INR (₨)
Apr. 01, 2019
INR (₨)
Mar. 31, 2019
INR (₨)
Mar. 31, 2018
INR (₨)
Assets:            
Cash and cash equivalents ₨ 144,499 $ 1,917     ₨ 158,529 ₨ 44,925
Investments            
Financial instruments at FVTPL 14,795       13,960  
Financial instruments at FVTOCI 164,884       191,964  
Financial instruments at Amortized cost 19,258       21,708  
Other financial assets            
Trade receivables 110,523       104,862  
Unbilled receivables 25,209       22,880  
Other assets 14,495       19,757  
Derivative assets 3,025       5,104  
Total 496,688       538,764  
Trade payables and other payables            
Trade payables and accrued expenses 78,129       88,304  
Lease liabilities 19,198     ₨ 15,379    
Other liabilities 1,050       644  
Loans, borrowings and bank overdrafts 78,042       99,467  
Derivative liabilities 7,369       1,310  
Total ₨ 183,788   ₨ 561   ₨ 189,725