v3.26.1
Segment Information - Disclosure of Contribution of Revenue More than 10% from Geographical Areas (Detail)
₨ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2026
INR (₨)
Mar. 31, 2026
USD ($)
Mar. 31, 2025
INR (₨)
Mar. 31, 2024
INR (₨)
Disclosure of operating segments [line items]        
Revenue ₨ 926,240 $ 9,871 ₨ 890,884 ₨ 897,603
Operating Segments [member]        
Disclosure of operating segments [line items]        
Revenue 928,093   890,916 897,943
Operating Segments [member] | Revenue greater than 10% percent benchmark        
Disclosure of operating segments [line items]        
Revenue 650,227   625,184 621,353
Operating Segments [member] | United States of America [member]        
Disclosure of operating segments [line items]        
Revenue 553,186   529,943 512,740
Operating Segments [member] | United Kingdom [member]        
Disclosure of operating segments [line items]        
Revenue ₨ 97,041   ₨ 95,241 ₨ 108,613