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Share-based payments - Additional Information (Details)		12 Months Ended
	Sep. 16, 2014 € / shares	Dec. 31, 2021 plan € / shares
Disclosure Of Detailed Information About Share-based Payments [Line Items]
Number of preceding trading days taken into account in the determination of the share price on the grant date		20 days
BSPCE
Disclosure Of Detailed Information About Share-based Payments [Line Items]
Number of share-based payment arrangement plans		9
BSA
Disclosure Of Detailed Information About Share-based Payments [Line Items]
Number of share-based payment arrangement plans		12
OSA
Disclosure Of Detailed Information About Share-based Payments [Line Items]
Number of share-based payment arrangement plans		9
AGA
Disclosure Of Detailed Information About Share-based Payments [Line Items]
Number of share-based payment arrangement plans		2
BSA 2014
Disclosure Of Detailed Information About Share-based Payments [Line Items]
Exercise price (in euros per share) | € / shares	€ 17.67	€ 40

X

- Definition

The exercise price of share options granted.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2021-01-01
-Paragraph 47
-Subparagraph a
-Clause i
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-URIDate 2021-03-24

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X

- Definition

Disclosure Of Detailed Information About Share-based Payments

+ References

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- Definition

Number Of Preceding Trading Days Taken Into Account In The Determination Of The Share Price On The Grant Date

+ References

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- Definition

Number Of Share-Based Payment Arrangement Plans

+ References

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