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Scheduled Maturities of Long-Term Debt (Parenthetical) (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2016 INR (₨)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 INR (₨)
Debt Instrument [Line Items]
Long-term debt	₨ 522,313.5	$ 7,884.0	₨ 457,934.4
Perpetual debt
Debt Instrument [Line Items]
Long-term debt	₨ 2,000.0

X

- Definition

Amount, before unamortized debt issuance costs, of long-term debt.

+ References

No definition available.

+ Details

Name:	hdb_LongTermDebtBeforeUnamortizedDebtIssuanceCost
Namespace Prefix:	hdb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=hdb_PerpetualDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: