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Troubled Debt Restructurings that Have Defaulted (Detail) - 12 months ended Mar. 31, 2015
₨ in Millions, $ in Millions
INR (₨)
USD ($)
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults ₨ 151.7 $ 2.4
Retail Business Banking    
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 72.2  
Wholesale loans    
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults ₨ 79.5