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Accrued Expenses and Other Liabilities - Additional Information (Detail) ₨ in Millions, $ in Millions | 12 Months Ended
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Mar. 31, 2016 INR (₨) | Mar. 31, 2016 USD ($) | Mar. 31, 2015 INR (₨)
Credit card |  |  |
Other Liabilities [Line Items] |  |  |
Unamortized annual fees | ₨ 299.2 | $ 4.5 | ₨ 285.6

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- Definition Other Liabilities [Line Items] + References No definition available. + Details
Name: | hdb_OtherLiabilitiesLineItems
Namespace Prefix: | hdb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition 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. + References No definition available. + Details
Name: | hdb_UnamortizedFeesCreditCards
Namespace Prefix: | hdb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | hdb_ProductByTypeAxis=hdb_CreditCardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |