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Reverse Recapitalization - Summary of Detailed Information About Excess Fair Value of Shares Issued Over Fair Value of Identifiable Net Assets Acquired (Parenthetical) (Detail) shares in Thousands	Dec. 14, 2022 shares
PCAC [Member]
Disclosure of Reverse Recapitalization [Line Items]
Number of shares issued under share based payments transactions	10,640

X

- Definition

Disclosure of reverse recapitalization.

+ References

No definition available.

+ Details

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

X

- Definition

Number of shares issued under share based payments transactions.

+ References

No definition available.

+ Details

Name:	lanv_NumberOfSharesIssuedUnderShareBasedPaymentsTransactions
Namespace Prefix:	lanv_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Details

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