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Troubled Debt Restructurings that Have Defaulted (Detail)
₨ in Millions
12 Months Ended
Mar. 31, 2018
INR (₨)
Financing Receivable, Modifications [Line Items]  
Recorded investment of defaults ₨ 0
Retail Loans | Retail Business Banking  
Financing Receivable, Modifications [Line Items]  
Recorded investment of defaults 0
Retail Loans | Commercial vehicle and construction equipment finance  
Financing Receivable, Modifications [Line Items]  
Recorded investment of defaults 0
Wholesale loans  
Financing Receivable, Modifications [Line Items]  
Recorded investment of defaults ₨ 0