v3.26.1
Loans, borrowings and bank overdrafts - Summary of Current and Non-Current Borrowings (Parenthetical) (Details)
₨ in Millions, $ in Millions
Jun. 23, 2021
USD ($)
Mar. 31, 2026
INR (₨)
Mar. 31, 2025
INR (₨)
Mar. 31, 2024
INR (₨)
Disclosure of detailed information about borrowings [line items]        
Bank overdrafts   ₨ 0 ₨ 2
Loans, borrowings and bank overdrafts [1]   ₨ 167,874 ₨ 161,817  
Unsecured Notes 2026 [member]        
Disclosure of detailed information about borrowings [line items]        
Loans, borrowings and bank overdrafts | $ $ 750      
Interest rate 1.50% 1.50%    
Final maturity June 23, 2026      
[1] Includes future cash outflow towards estimated interest on loans, borrowings and bank overdrafts, and lease liabilities.