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Intangibles Assets and Goodwill - Summary of Inputs and Assumptions Used in Performing Impairment Test for Intangible Assets and Goodwill (Detail)
€ in Thousands
 12 Months Ended
Dec. 31, 2019
EUR (€)
Dec. 31, 2018
EUR (€)
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Net book value after impairment test € 4,068 € 3,947
Italy [member] | Retail stores [member]    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Net book value after impairment test € 1,921 € 1,921
Growth rate 1.00% 0.50%
WACC 9.05 11
Sales CAGR 2018-2022 8.50% 6.00%
Mexico [member] | Retail stores [member]    
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]    
Net book value after impairment test € 2,147 € 2,026
Growth rate 3.40% 0.50%
WACC 13.92 18
Sales CAGR 2018-2022 9.30% 8.50%