XML 111 R101.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Exposures to Ten Largest Borrowers Computed as per RBI Guidelines, Based on Higher of Outstanding Balance or Limit on Loans, Investments (Including Credit Substitutes) and Non-Funded Exposures (Detail) ₨ in Millions, $ in Millions | Mar. 31, 2018 INR (₨) | Mar. 31, 2018 USD ($) | Mar. 31, 2017 INR (₨)
--- | --- | --- | ---
Concentration Risk [Line Items] |  |  |
Total Exposure | ₨ 8,598,005.1 | $ 132,053.6 | ₨ 7,276,675.4
Borrower 1 |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 90,988.2 | 1,397.5 | 106,885.0
Borrower 1 | Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 11,615.0 |  | 19,561.0
Borrower 1 | Non-Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 79,373.2 |  | 87,324.0
Borrower 2 |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 80,093.3 | 1,230.1 | 73,443.3
Borrower 2 | Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 80,006.2 |  | 54,388.2
Borrower 2 | Non-Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 87.1 |  | 19,055.1
Borrower 3 |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 75,973.3 | 1,166.8 | 65,040.1
Borrower 3 | Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 27,567.3 |  | 65,000.0
Borrower 3 | Non-Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 48,406.0 |  | 40.1
Borrower 4 |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 73,422.5 | 1,127.7 | 62,119.8
Borrower 4 | Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 59,631.9 |  | 33,472.8
Borrower 4 | Non-Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 13,790.6 |  | 28,647.0
Borrower 5 |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 70,012.7 | 1,075.3 | 58,598.7
Borrower 5 | Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 70,012.7 |  | 45,790.0
Borrower 5 | Non-Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure |  |  | 12,808.7
Borrower 6 |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 57,070.0 | 876.5 | 50,000.0
Borrower 6 | Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 34,673.6 |  | 50,000.0
Borrower 6 | Non-Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 22,396.4 |  |
Borrower 7 |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 56,378.6 | 865.9 | 40,000.0
Borrower 7 | Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 13,054.6 |  | 40,000.0
Borrower 7 | Non-Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 43,324.0 |  |
Borrower 8 |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 54,750.9 | 840.9 | 39,998.0
Borrower 8 | Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 6,001.5 |  | 19,071.8
Borrower 8 | Non-Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 48,749.4 |  | 20,926.2
Borrower 9 |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 47,667.1 | 732.1 | 35,984.2
Borrower 9 | Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 44,367.1 |  | 34,744.2
Borrower 9 | Non-Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 3,300.0 |  | 1,240.0
Borrower 10 |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | 45,000.0 | $ 691.1 | 35,945.8
Borrower 10 | Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure | ₨ 45,000.0 |  | 7,502.1
Borrower 10 | Non-Funded Exposure |  |  |
Concentration Risk [Line Items] |  |  |
Total Exposure |  |  | ₨ 28,443.7

X
- Definition Maximum amount of exposure due to credit risk that, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity. + References No definition available. + Details
Name: | hdb_LoansAndLeasesReceivableNetOfDeferredIncomeAndAvailableForSaleCreditSubstituteSecuritiesAndNonFundedExposure
Namespace Prefix: | hdb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_ConcentrationRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_MajorCustomersAxis=hdb_BorrowerOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=hdb_FundedExposureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=hdb_NonfundedExposureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=hdb_BorrowerTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=hdb_BorrowerThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=hdb_BorrowerFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=hdb_BorrowerFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=hdb_BorrowerSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=hdb_BorrowerSevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=hdb_BorrowerEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=hdb_BorrowerNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=hdb_BorrowerTenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |