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Indemnification assets (Details) - EUR (€)
€ in Millions
1 Months Ended 12 Months Ended
Jan. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about business combination [line items]        
Indemnification assets recognised as of acquisition date   € 35.4 € 79.4 € 73.8
Indemnification Assets Recognised As Of Acquisition Date     0.0 € 6.1
Reclassified from Other receivables   0.0 (0.5)  
Release of indemnified provision € (17.8) (44.0) 0.0  
Goodfella's Pizza [Member]        
Disclosure of detailed information about business combination [line items]        
Indemnification Assets Recognised As Of Acquisition Date   5.6 5.6  
Findus        
Disclosure of detailed information about business combination [line items]        
Indemnification assets recognised as of acquisition date   € 29.8 € 73.8