v3.26.1
Non-interest revenue - Summary of Disaggregation of Revenue (Detail)
₨ in Millions, $ in Millions
 12 Months Ended
Mar. 31, 2026
INR (₨)
Mar. 31, 2026
USD ($)
Mar. 31, 2025
INR (₨)
Mar. 31, 2024
INR (₨)
Disaggregation of Revenue [Line Items]        
Fees and commissions ₨ 356,569.1 $ 3,800.2 ₨ 324,086.5 ₨ 280,965.9
Deposit related fees        
Disaggregation of Revenue [Line Items]        
Fees and commissions 55,009.0 586.3 49,755.2 45,178.6
Lending related fees        
Disaggregation of Revenue [Line Items]        
Fees and commissions 75,177.0 801.2 63,372.6 55,501.7
Third-party products related fees        
Disaggregation of Revenue [Line Items]        
Fees and commissions 53,358.1 568.7 49,214.3 43,049.3
Payments and cards business fees        
Disaggregation of Revenue [Line Items]        
Fees and commissions 111,003.3 1,183.0 104,416.2 92,568.5
Investment management fee        
Disaggregation of Revenue [Line Items]        
Fees and commissions 42,103.3 448.7 36,902.3 20,819.1
Other        
Disaggregation of Revenue [Line Items]        
Fees and commissions ₨ 19,918.4 $ 212.3 ₨ 20,425.9 ₨ 23,848.7