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Subsidiaries - Additional Information (Detail)	Mar. 31, 2020	Mar. 31, 2019
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%	97.60%
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	95.90%	96.10%

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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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