v3.25.2
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, 2025
INR (₨)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
INR (₨)
Mar. 31, 2024
USD ($)
Mar. 31, 2023
INR (₨)
Mar. 31, 2022
INR (₨)
Borrowings (other than CCPS)            
Term loan from banks ₨ 582,307 $ 6,816 ₨ 565,861      
Other Financial Liabilities [Abstract]            
Lease liabilities 9,259 108 8,345 $ 98 ₨ 6,169 ₨ 3,454
Current maturities of long term interest-bearing loans and borrowings 60,384 707 29,803      
Purchase consideration payable 44 1 44      
Trade Payables [Abstract]            
Trade payables 8,173 $ 96 9,094      
Borrowings [Member]            
Borrowings (other than CCPS)            
Non convertible debentures (secured) 58,372   69,346      
Compulsorily convertible debentures 55,969   46,351      
Optionally convertible debentures 7,797   7,994      
Term loan from banks 183,506   189,034      
Loans from financial institutions 312,514   307,453      
Senior secured notes 161,692   157,976      
Short Term Interest Bearing Loans And Borrowings [Member]            
Short Term Interest Bearing Loans And Borrowings [Abstract]            
Acceptances (secured) 55,488   27,680      
Term loan from banks and financial institutions (secured)     1,600      
Buyer's / supplier's credit (secured) 6,169   11,123      
Working capital term loan (secured) 18,670   11,249      
Other Financial Liabilities [Member]            
Other Financial Liabilities [Abstract]            
Lease liabilities 29,443   28,464      
Current maturities of long term interest-bearing loans and borrowings 110,094   81,408      
Interest accrued 5,405   2,957      
Capital creditors 32,545   40,092      
Purchase consideration payable 44   44      
Trade Payables [Member]            
Trade Payables [Abstract]            
Trade payables 8,173   9,094      
On demand [member] | Other Financial Liabilities [Member]            
Other Financial Liabilities [Abstract]            
Current maturities of long term interest-bearing loans and borrowings     680      
Less than 3 months [member] | Short Term Interest Bearing Loans And Borrowings [Member]            
Short Term Interest Bearing Loans And Borrowings [Abstract]            
Acceptances (secured) 41,652   17,822      
Term loan from banks and financial institutions (secured)     1,600      
Buyer's / supplier's credit (secured) 4,726   9,603      
Working capital term loan (secured) 12,030   6,799      
Less than 3 months [member] | Other Financial Liabilities [Member]            
Other Financial Liabilities [Abstract]            
Lease liabilities 176   196      
Current maturities of long term interest-bearing loans and borrowings 28,337   17,264      
Interest accrued 944   1,160      
Capital creditors 32,545   40,092      
Purchase consideration payable 44   44      
Less than 3 months [member] | Trade Payables [Member]            
Trade Payables [Abstract]            
Trade payables 8,173   9,094      
3 to 12 months [member] | Short Term Interest Bearing Loans And Borrowings [Member]            
Short Term Interest Bearing Loans And Borrowings [Abstract]            
Acceptances (secured) 13,836   9,858      
Buyer's / supplier's credit (secured) 1,443   1,520      
Working capital term loan (secured) 6,640   4,450      
3 to 12 months [member] | Other Financial Liabilities [Member]            
Other Financial Liabilities [Abstract]            
Lease liabilities 771   701      
Current maturities of long term interest-bearing loans and borrowings 81,757   63,464      
Interest accrued 4,461   1,797      
1 to 5 years [member] | Borrowings [Member]            
Borrowings (other than CCPS)            
Non convertible debentures (secured) 50,009   61,883      
Compulsorily convertible debentures 15,601   8,064      
Optionally convertible debentures 785   785      
Term loan from banks 153,906   154,033      
Loans from financial institutions 162,887   160,069      
Senior secured notes 161,692   157,976      
1 to 5 years [member] | Other Financial Liabilities [Member]            
Other Financial Liabilities [Abstract]            
Lease liabilities 3,353   2,991      
> 5 years [member] | Borrowings [Member]            
Borrowings (other than CCPS)            
Non convertible debentures (secured) 8,363   7,463      
Compulsorily convertible debentures 40,368   38,287      
Optionally convertible debentures 7,012   7,209      
Term loan from banks 29,600   35,001      
Loans from financial institutions 149,627   147,384      
Senior secured notes 0          
> 5 years [member] | Other Financial Liabilities [Member]            
Other Financial Liabilities [Abstract]            
Lease liabilities ₨ 25,143   ₨ 24,576