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Impairment Testing Of Intangible Assets With Indefinite Useful Lives - Summary Of The Sensitivity Of The Impairment Testing To Reasonably Possible Changes In Key Assumptions (Detail) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Goodwill [member] | WACC [member] | Lanvin [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Increase in unobservable input, assets € 3,810 € 4,002
Goodwill [member] | WACC [member] | Wolford [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Increase in unobservable input, assets 5,904 5,356
Goodwill [member] | WACC [member] | St. John [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Increase in unobservable input, assets 1,928 1,331
Goodwill [member] | Long Term Growth Rate [Member] | Lanvin [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Decrease in unobservable input, assets 1,522 1,563
Goodwill [member] | Long Term Growth Rate [Member] | Wolford [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Decrease in unobservable input, assets 2,507 2,888
Goodwill [member] | Long Term Growth Rate [Member] | St. John [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Decrease in unobservable input, assets 782 642
Brand [member] | WACC [member] | Lanvin [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Increase in unobservable input, assets 1,002 1,035
Brand [member] | WACC [member] | Wolford [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Increase in unobservable input, assets 491 476
Brand [member] | WACC [member] | St. John [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Increase in unobservable input, assets 330 245
Brand [member] | WACC [member] | Sergio Rossi [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Increase in unobservable input, assets 23 31
Brand [member] | Long Term Growth Rate [Member] | Lanvin [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Decrease in unobservable input, assets 310 330
Brand [member] | Long Term Growth Rate [Member] | Wolford [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Decrease in unobservable input, assets 172 219
Brand [member] | Long Term Growth Rate [Member] | St. John [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Decrease in unobservable input, assets 110 87
Brand [member] | Long Term Growth Rate [Member] | Sergio Rossi [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Decrease in unobservable input, assets 6 10
Brand [member] | Royalty Rate [Member] | Lanvin [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Decrease in unobservable input, assets 2,236 2,178
Brand [member] | Royalty Rate [Member] | Wolford [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Decrease in unobservable input, assets 2,053 2,004
Brand [member] | Royalty Rate [Member] | St. John [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Decrease in unobservable input, assets 1,118 924
Brand [member] | Royalty Rate [Member] | Sergio Rossi [Member]    
Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [line items]    
Decrease in unobservable input, assets € 334 € 351