v3.26.1
Finance costs and fair value change in derivative instruments - Additional Information (Detail) - INR (₨)
₨ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disclosure Of Detailed Information About Finance Cost And Fair Value Change in Derivative Instruments [Abstract]      
Unwinding income on trade receivables of financial assets ₨ 83 ₨ 301 ₨ 504