Accrued Expenses and Other Liabilities - Additional Information (Detail) ₨ in Millions, $ in Millions	12 Months Ended
Mar. 31, 2015 INR (₨)	Mar. 31, 2015 USD ($)	Mar. 31, 2014 INR (₨)
Credit card
Other Liabilities [Line Items]
Unamortized annual fees	₨ 285.6	$ 4.6	₨ 176.3

Amount of unamortized annual fees received on issue of credit cards which is expected to be recognized in income within one year or the normal operating cycle, if longer.

No definition available.

Name:	hdb_UnamortizedFeesCreditCards
Namespace Prefix:	hdb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration