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Subsidiaries - Additional Information (Detail) | Mar. 31, 2021 | Mar. 31, 2020
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HDFC Securities Ltd. |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |
The stake-holding of the Bank | 96.80% | 96.80%
HDB Financial Services Limited |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |
The stake-holding of the Bank | 95.70% | 95.90%

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- 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
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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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- Details
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- Details
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