v3.26.1
Segment information - Additional Information (Detail)
₨ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2026
INR (₨)
Customer
Mar. 31, 2026
USD ($)
Customer
Mar. 31, 2025
INR (₨)
Customer
Mar. 31, 2024
INR (₨)
Customer
Disclosure of operating segments [line items]        
Revenue ₨ 132,196 $ 1,409 ₨ 97,063 ₨ 81,319
Percentage of entity revenue 10.00% 10.00%    
Number of major customers more than ten percentage of revenue | Customer 1 1 1 1
One Major Customer [Member]        
Disclosure of operating segments [line items]        
Revenue | ₨ ₨ 26,257   ₨ 18,108 ₨ 23,343