v3.25.2
Fair values - Summary of Carrying Amounts And Fair Value of the Financial Instruments (Detail)
₨ in Millions, $ in Millions
Mar. 31, 2025
INR (₨)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
INR (₨)
Interest-bearing loans and borrowings - long term | Financial liabilities measured at amortised cost      
Financial liabilities      
Carrying value ₨ 642,691 $ 7,524 ₨ 595,664
Fair value 631,249 7,389 585,787
Interest accrued | Financial liabilities measured at amortised cost      
Financial liabilities      
Carrying value 5,405 63 2,957
Fair value 5,405 63 2,957
Capital creditors | Financial liabilities measured at amortised cost      
Financial liabilities      
Carrying value 32,545 381 40,092
Fair value 32,545 381 40,092
Purchase consideration payable | Financial liabilities measured at amortised cost      
Financial liabilities      
Carrying value 44 1 44
Fair value 44 1 44
Liability for operation and maintenance | Financial liabilities measured at amortised cost      
Financial liabilities      
Carrying value 1,323 15 2,193
Fair value 1,323 15 2,193
Interest-bearing loans and borrowings - short term | Financial liabilities measured at amortised cost      
Financial liabilities      
Carrying value 80,327 940 51,652
Fair value 80,327 940 51,652
Trade payables | Financial liabilities measured at amortised cost      
Financial liabilities      
Carrying value 8,173 96 9,094
Fair value 8,173 96 9,094
Liability for put options with non-controlling interests      
Financial liabilities      
Carrying value 6,358   5,935
Liability for put options with non-controlling interests | Financial liabilities at fair value      
Financial liabilities      
Carrying value 6,370 75 5,935
Fair value 6,370 75 5,935
Derivative instruments - share warrants | Financial liabilities at fair value through profit or loss      
Financial liabilities      
Carrying value 190 2 772
Fair value 190 2 772
Derivative instruments - hedge instruments | Financial liabilities designated as a hedge instrument at fair value      
Financial liabilities      
Carrying value 857 10 546
Fair value 857 10 546
Security deposits | Financial assets measured at amortised cost      
Financial assets      
Carrying value 754 9 543
Fair value 754 9 543
Bank deposits with remaining maturity for more than twelve months | Financial assets measured at amortised cost      
Financial assets      
Carrying value 2,433 28 2,888
Fair value 2,433 28 2,888
Trade receivables | Financial assets measured at amortised cost      
Financial assets      
Carrying value 24,268 284 21,856
Fair value 24,268 284 21,856
Cash and cash equivalents | Financial assets measured at amortised cost      
Financial assets      
Carrying value 40,419 473 27,021
Fair value 40,419 473 27,021
Bank balances other than cash and cash equivalents | Financial assets measured at amortised cost      
Financial assets      
Carrying value 40,099 469 50,706
Fair value 40,099 469 50,706
Advances recoverable | Financial assets measured at amortised cost      
Financial assets      
Carrying value 634 7 1,449
Fair value 634 7 1,449
Interest accrued on fixed deposits | Financial assets measured at amortised cost      
Financial assets      
Carrying value 900 11 1,003
Fair value 900 11 1,003
Interest accrued on loans to related parties | Financial assets measured at amortised cost      
Financial assets      
Carrying value 15 0 4
Fair value 15 0 4
Government grant receivable | Financial assets measured at amortised cost      
Financial assets      
Carrying value 288 3 322
Fair value 288 3 322
Deferred consideration receivable | Financial assets measured at amortised cost      
Financial assets      
Carrying value 385 5 1,026
Fair value 385 5 1,026
Loans to related parties | Financial assets measured at amortised cost      
Financial assets      
Carrying value 284 3 232
Fair value 284 3 232
Other current financial assets | Financial assets measured at amortised cost      
Financial assets      
Carrying value 554 6 438
Fair value 554 6 438
Investments | Financial assets measured at fair value through profit or loss      
Financial assets      
Carrying value 1,342 16 2,325
Fair value 1,342 16 2,325
Derivative instruments - hedge instruments | Financial assets designated as a hedge instrument at fair value      
Financial assets      
Carrying value 7,398 87 3,566
Fair value ₨ 7,398 $ 87 ₨ 3,566