v3.26.1
Financial instruments (Details 7) - Level 3 of fair value hierarchy [member] - INR (₨)
₨ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Forward/options contracts [member]    
Liabilities    
Derivative financial liabilities ₨ 2  
Cross currency swaps [member]    
Assets    
Derivative financial assets ₨ 11 ₨ 19