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Non-Underlying Items - Additional information (Detail)	Dec. 14, 2022 $ / shares
Disclosure of Non Underlying Items [Line Items]
Par value per share of shares issued under share based payments transactions	$ 9.9
PCAC [Member]
Disclosure of Non Underlying Items [Line Items]
Par value per share of shares issued under share based payments transactions	$ 9.9

X

- Definition

Disclosure of Non Underlying Items.

+ References

No definition available.

+ Details

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Namespace Prefix:	lanv_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Par Value per share of shares issued under share based payments transactions.

+ References

No definition available.

+ Details

Name:	lanv_ParValuePerShareOfSharesIssuedUnderShareBasedPaymentsTransactions
Namespace Prefix:	lanv_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	dei_LegalEntityAxis=lanv_PcacMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: