v3.26.1
Loans - Additional Information (Detail)
₨ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2026
INR (₨)
Mar. 31, 2026
USD ($)
Mar. 31, 2025
INR (₨)
Mar. 31, 2026
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans provided as collateral for borrowings ₨ 2,088,507.6   ₨ 2,750,841.6 $ 22,258.4
Purchased financing receivable outstanding 1,373.0 $ 14.6 1,691.8  
Loans receivable restructured due to unexpected event 29,000.0   45,700.0 $ 300.0
Retail Loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans receivable restructured due to unexpected event 26,900.0   42,900.0  
Wholesale Loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans receivable restructured due to unexpected event ₨ 2,100.0   ₨ 2,800.0  
Current Loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Number of days past due up to which loans 90 days     90 days
Crop related agricultural loans        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Number of days past due up to which loans 366 days     366 days