v3.25.2
Fair Value Measurement Hierarchy - Summary of Fair Value Measurement Hierarchy Of The Financial Assets And Liabilities (Detail)
₨ in Millions, $ in Millions
Mar. 31, 2025
INR (₨)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
INR (₨)
Liability for put options with non-controlling interests      
Financial Liabilities [Abstract]      
Carrying value ₨ 6,358   ₨ 5,935
Financial liabilities at fair value | Liability for put options with non-controlling interests      
Financial Liabilities [Abstract]      
Carrying value 6,370 $ 75 5,935
Fair value 6,370 75 5,935
Financial liabilities at fair value | Liability for put options with non-controlling interests | Level 2      
Financial Liabilities [Abstract]      
Carrying value 6,370 75 5,935
Fair value 6,370 75 5,935
Financial liabilities designated as a hedge instrument at fair value | Derivative instruments - hedge instruments | Level 2      
Financial Liabilities [Abstract]      
Carrying value 857 10 546
Fair value 857 10 546
Financial liabilities at fair value through profit or loss | Derivative instruments - public share warrants | Level 1      
Financial Liabilities [Abstract]      
Carrying value 156 2 558
Fair value 156 2 558
Financial liabilities at fair value through profit or loss | Derivative instruments - private share warrants | Level 2      
Financial Liabilities [Abstract]      
Carrying value 34 0 214
Fair value 34 0 214
Financial assets designated as a hedge instrument at fair value | Derivative instruments      
Financial Assets [Abstract]      
Carrying value 7,398 87 3,566
Fair value 7,398 87 3,566
Financial assets designated as a hedge instrument at fair value | Derivative instruments | Level 2      
Financial Assets [Abstract]      
Carrying value 7,398 87 3,566
Fair value 7,398 87 3,566
Financial assets at fair value through profit or loss | Investments | Level 2      
Financial Assets [Abstract]      
Carrying value 1,342 16 2,325
Fair value ₨ 1,342 $ 16 ₨ 2,325