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General Information and Statement of Compliance - Additional Information (Detail)	Dec. 21, 2018	Aug. 13, 2018	Jul. 03, 2018	Apr. 07, 2015
DBV Technologies Inc. [member]
Disclosure of subsidiaries [line items]
Proportion of ownership interest in subsidiary				100.00%
DBV Australia Pty Ltd. [member]
Disclosure of subsidiaries [line items]
Proportion of ownership interest in subsidiary			100.00%
DBV Canada Ltd. [member]
Disclosure of subsidiaries [line items]
Proportion of ownership interest in subsidiary		100.00%
DBV Pharma [member]
Disclosure of subsidiaries [line items]
Proportion of ownership interest in subsidiary	100.00%

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

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- Definition

The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2018-01-01
-Paragraph 17
-Subparagraph b
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2018-03-01&anchor=para_17_b_iii&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2018-01-01
-Paragraph 16
-Subparagraph b
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2018-03-01&anchor=para_16_b_iii&doctype=Standard
-URIDate 2018-03-16

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2018-01-01
-Paragraph 19B
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_19B_c&doctype=Standard
-URIDate 2018-03-16

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