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Subsidiaries - Additional Information (Detail)	Dec. 01, 2016 ₨ / shares shares	Mar. 31, 2019 ₨ / shares	Mar. 31, 2018 ₨ / shares
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Equity shares, par value		₨ 2.0	₨ 2.0
Atlas Documentary Facilitators Company Private Ltd
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
The stake-holding of the Bank	59.00%
Atlas Documentary Facilitators Company Private Ltd | HDB Financial Services Limited
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Equity shares, issued | shares	7,540,515
Equity shares, par value	₨ 10
Share exchange ratio	16.75
HBL Global Private Ltd | Atlas Documentary Facilitators Company Private Ltd
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
The stake-holding of the Bank		98.00%
HBL Global Private Ltd | HDB Financial Services Limited
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Equity shares, issued | shares	20,470
Equity shares, par value	₨ 10
Share exchange ratio	102.35
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		96.10%	96.40%
HDFC Securities Ltd.
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
The stake-holding of the Bank		97.60%	97.90%

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Face amount or stated value per share of common stock.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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- Definition

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-Name Accounting Standards Codification
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