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Bank Overview - Additional Information (Detail)
 12 Months Ended
Mar. 31, 2015
₨ / shares
shares
Mar. 31, 2014
shares
Mar. 31, 2013
shares
Mar. 31, 2015
$ / shares
Per ADS information (where 1 ADS represents 3 shares)        
Nature Of Business [Line Items]        
Shares issued 22,000,000      
Shares issued, price per share | $ / shares       $ 57.76
Equity Shares        
Nature Of Business [Line Items]        
Shares issued 66,000,000      
Qualified Institutional Placement (QIP)        
Nature Of Business [Line Items]        
Shares issued 18,744,142      
Shares issued, price per share | ₨ / shares ₨ 1,067.0      
Employees Stock Option Scheme        
Nature Of Business [Line Items]        
Total number of shares issued pursuant to exercise of stock options [1] 22,700,740 18,903,115 33,459,050  
Housing Development Finance Corporation Limited        
Nature Of Business [Line Items]        
Equity ownership interest of the bank's largest shareholder, Housing Development Finance Corporation Limited and its subsidiaries 21.70%      
[1] As of March 31, 2013 includes 728,290 options exercised, pending allotment of equity shares. As of March 31, 2014 excludes 728,290 options of equity shares allotted which were exercised in previous year.