v3.26.1
Repurchase and Resell Agreements - Additional Information (Detail)
₨ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2026
INR (₨)
Mar. 31, 2026
USD ($)
Mar. 31, 2025
INR (₨)
Repurchase Agreement and Resale Agreement Counterparty [Line Items]      
Securities purchased under agreements to resell ₨ 421,575.4 $ 4,493.0 ₨ 349,210.7
Securities sold under repurchase agreements, amount outstanding ₨ 100,000.0 $ 1,065.8 ₨ 129,190.0
Maximum      
Repurchase Agreement and Resale Agreement Counterparty [Line Items]      
Securities purchased under agreements to resell, maturity (days) 14 days    
Securities sold under repurchase agreements, maturity (days) 14 days