XML 409 R147.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Share-based compensation reserve (Details) - EUR (€)
€ in Millions
1 Months Ended 12 Months Ended
Jun. 19, 2019
Jun. 14, 2018
Jun. 19, 2017
Jun. 30, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of reserves within equity [line items]              
Beginning balance, Reserve of share-based payments         € 9.4    
Increase (decrease) through share-based payment transactions, equity         14.9 € 13.0 € 2.6
Vesting of Non-Executive Director restricted shares       € (0.1) 0.8 0.2 € 0.1
Stock Vested During Period, Value, Restricted Stock Award, Gross1         (1.3)    
Ending balance, Reserve of share-based payments         22.6 9.4  
Share based compensation reserve              
Disclosure of reserves within equity [line items]              
Beginning balance, Reserve of share-based payments         9.4    
Vesting of Non-Executive Director restricted shares         (0.8)    
Ending balance, Reserve of share-based payments         22.6 € 9.4  
Non-Executive Director | Share based compensation reserve              
Disclosure of reserves within equity [line items]              
Increase (decrease) through share-based payment transactions, equity         0.9    
Key management personnel | Share based compensation reserve              
Disclosure of reserves within equity [line items]              
Increase (decrease) through share-based payment transactions, equity         € 14.0    
Restricted Stock1 [Member] | Non-Executive Director              
Disclosure of reserves within equity [line items]              
Liabilities From Share-based Payment Transactions, Shares 12,100 12,312 9,384   400,000