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Non-Interest Revenue - Summary of Disaggregation of Revenue (Detail)
₨ in Millions, $ in Millions
 12 Months Ended
Mar. 31, 2022
INR (₨)
Mar. 31, 2022
USD ($)
Mar. 31, 2021
INR (₨)
Mar. 31, 2020
INR (₨)
Disaggregation of Revenue [Line Items]        
Fees and commissions ₨ 202,979.5 $ 2,675.4 ₨ 165,410.4 ₨ 160,099.5
Deposit Related Fees        
Disaggregation of Revenue [Line Items]        
Fees and commissions 37,415.4 493.2 28,150.4 29,031.9
Lending related fees        
Disaggregation of Revenue [Line Items]        
Fees and commissions 40,532.5 534.2 30,973.1 30,699.9
Third-party products related fees        
Disaggregation of Revenue [Line Items]        
Fees and commissions 44,216.1 582.8 35,733.0 28,169.6
Payments and cards business fees        
Disaggregation of Revenue [Line Items]        
Fees and commissions 56,170.2 740.3 50,758.2 58,899.3
Other        
Disaggregation of Revenue [Line Items]        
Fees and commissions ₨ 24,645.3 $ 324.9 ₨ 19,795.7 ₨ 13,298.8