XML 128 R115.htm IDEA: XBRL DOCUMENT
v3.5.0.2

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: |