v3.26.1
Financial risk management objectives and policies - Summary of Maturity Profile of Financial Liabilities of the Group Based on Contractual Undiscounted (Detail)
₨ in Millions, $ in Millions
Mar. 31, 2026
INR (₨)
Mar. 31, 2026
USD ($)
Mar. 31, 2025
INR (₨)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
INR (₨)
Mar. 31, 2023
INR (₨)
Borrowings (other than CCPS)            
Term loan from banks ₨ 527,621 $ 5,623 ₨ 582,307      
Other Financial Liabilities [Abstract]            
Lease liabilities 12,433 133 9,259 $ 99 ₨ 8,345 ₨ 6,169
Current maturities of long term interest-bearing loans and borrowings 183,287 1,953 60,384      
Purchase consideration payable 4 0 44      
Trade Payables [Abstract]            
Trade payables 17,820 $ 190 8,173      
Borrowings [Member]            
Borrowings (other than CCPS)            
Non convertible debentures (secured) 20,339   58,372      
Compulsorily convertible debentures 15,776   55,969      
Optionally convertible debentures 2,497   7,797      
Term loan from banks 200,964   183,506      
Loans from financial institutions 257,102   312,514      
Others 294          
Senior secured notes 154,375   161,692      
Short Term Interest Bearing Loans And Borrowings [Member]            
Short Term Interest Bearing Loans And Borrowings [Abstract]            
Acceptances (secured) 33,973   55,488      
Working capital term loan 7,089   18,670      
Buyer's / Supplier's credit 13,308   6,169      
Term loan from banks and financial institutions (secured) 2,488          
Other Financial Liabilities [Member]            
Other Financial Liabilities [Abstract]            
Lease liabilities 38,054   29,443      
Current maturities of long term interest-bearing loans and borrowings 228,908   110,094      
Interest accrued 5,046   5,405      
Capital creditors 44,176   32,545      
Purchase consideration payable 4   44      
Liability for put options 16,110          
Trade Payables [Member]            
Trade Payables [Abstract]            
Trade payables 17,820   8,173      
Less than 3 months [member] | Short Term Interest Bearing Loans And Borrowings [Member]            
Short Term Interest Bearing Loans And Borrowings [Abstract]            
Acceptances (secured) 24,606   41,652      
Working capital term loan 7,089   12,030      
Buyer's / Supplier's credit 7,124   4,726      
Term loan from banks and financial institutions (secured) 1,400          
Less than 3 months [member] | Other Financial Liabilities [Member]            
Other Financial Liabilities [Abstract]            
Lease liabilities 230   176      
Current maturities of long term interest-bearing loans and borrowings 35,432   28,337      
Interest accrued 899   944      
Capital creditors 44,176   32,545      
Purchase consideration payable 4   44      
Less than 3 months [member] | Trade Payables [Member]            
Trade Payables [Abstract]            
Trade payables 17,820   8,173      
3 to 12 months [member] | Short Term Interest Bearing Loans And Borrowings [Member]            
Short Term Interest Bearing Loans And Borrowings [Abstract]            
Acceptances (secured) 9,367   13,836      
Working capital term loan     6,640      
Buyer's / Supplier's credit 6,184   1,443      
Term loan from banks and financial institutions (secured) 1,088          
3 to 12 months [member] | Other Financial Liabilities [Member]            
Other Financial Liabilities [Abstract]            
Lease liabilities 860   771      
Current maturities of long term interest-bearing loans and borrowings 193,476   81,757      
Interest accrued 4,147   4,461      
1 to 5 years [member] | Borrowings [Member]            
Borrowings (other than CCPS)            
Non convertible debentures (secured) 17,270   50,009      
Compulsorily convertible debentures     15,601      
Optionally convertible debentures     785      
Term loan from banks 165,070   153,906      
Loans from financial institutions 127,391   162,887      
Others 294          
Senior secured notes 116,515   161,692      
1 to 5 years [member] | Other Financial Liabilities [Member]            
Other Financial Liabilities [Abstract]            
Lease liabilities 4,189   3,353      
> 5 years [member] | Borrowings [Member]            
Borrowings (other than CCPS)            
Non convertible debentures (secured) 3,069   8,363      
Compulsorily convertible debentures 15,776   40,368      
Optionally convertible debentures 2,497   7,012      
Term loan from banks 35,894   29,600      
Loans from financial institutions 129,711   149,627      
Senior secured notes 37,860          
> 5 years [member] | Other Financial Liabilities [Member]            
Other Financial Liabilities [Abstract]            
Lease liabilities 32,775   ₨ 25,143      
Liability for put options ₨ 16,110