XML 73 R63.htm IDEA: XBRL DOCUMENT
v3.21.2

Bank Overview - Additional Information (Detail) |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Aug. 02, 2018 $ / shares shares | Jul. 17, 2018 ₨ / shares shares | Mar. 31, 2021 ₨ / shares shares | Mar. 31, 2020 ₨ / shares shares | Mar. 31, 2019 shares | Sep. 20, 2019 ₨ / shares shares | Sep. 19, 2019 ₨ / shares
Nature Of Business [Line Items] |  |  |  |  |  |  |
Shares issued, price per share | ₨ / shares |  |  |  |  |  | ₨ 1.0 |
Equity shares, issued |  |  | 5,512,776,482 | 5,483,286,460 |  | 5,470,763,894 |
Equity shares, par value | ₨ / shares |  |  | ₨ 1.0 | ₨ 1.0 |  | ₨ 1.0 | ₨ 2.0
Employees Stock Option Scheme |  |  |  |  |  |  |
Nature Of Business [Line Items] |  |  |  |  |  |  |
Total number of shares issued pursuant to exercise of stock options |  |  | 29,490,022 | 36,673,240 | 47,544,608 |  |
Per ADS information (where 1 ADS represents 3 shares) |  |  |  |  |  |  |
Nature Of Business [Line Items] |  |  |  |  |  |  |
Shares issued | 35,000,000 |  |  |  |  |  |
Shares issued, price per share | $ / shares | $ 52.00 |  |  |  |  |  |
Equity Shares |  |  |  |  |  |  |
Nature Of Business [Line Items] |  |  |  |  |  |  |
Shares issued | 105,000,000 |  |  |  |  |  |
Qualified Institutional Placement (QIP) |  |  |  |  |  |  |
Nature Of Business [Line Items] |  |  |  |  |  |  |
Shares issued |  |  | 25,694,444 |  |  |  |
Shares issued, price per share | ₨ / shares |  |  | ₨ 1,080.0 |  |  |  |
Housing Development Finance Corporation Limited |  |  |  |  |  |  |
Nature Of Business [Line Items] |  |  |  |  |  |  |
Equity ownership interest of the bank's largest shareholder |  |  | 21.10% | 21.20% |  |  |
Housing Development Finance Corporation Limited | Preferential Allotment |  |  |  |  |  |  |
Nature Of Business [Line Items] |  |  |  |  |  |  |
Shares issued |  | 78,193,634 |  |  |  |  |
Shares issued, price per share | ₨ / shares |  | ₨ 1,087.05 |  |  |  |  |

X
- Definition Nature Of Business [Line Items] + References No definition available. + Details
Name: | hdb_NatureOfBusinessLineItems
Namespace Prefix: | hdb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
Name: | us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | us-gaap_SharesIssuedPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of share options (or share units) exercised during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=hdb_AmericanDepositaryShareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=hdb_QualifiedInstitutionalPlacementQipMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=hdb_HousingDevelopmentFinanceCorporationLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | hdb_MajorShareholdersAxis=hdb_PreferentialAllotmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |