v3.10.0.1
Trade and Other Receivables - Summary of Aging of Group's Net Trade Receivables (Details) - EUR (€)
€ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of Trade And Other Receivables [Line Items]    
Trade receivables € 273 € 272
Financial Assets Past Due but Not Impaired    
Disclosure Of Trade And Other Receivables [Line Items]    
Trade receivables 273 272
Financial Assets Past Due but Not Impaired | Current    
Disclosure Of Trade And Other Receivables [Line Items]    
Trade receivables 195 153
Financial Assets Past Due but Not Impaired | Overdue 1 – 30 Days    
Disclosure Of Trade And Other Receivables [Line Items]    
Trade receivables 44 69
Financial Assets Past Due but Not Impaired | Overdue 31 – 60 Days    
Disclosure Of Trade And Other Receivables [Line Items]    
Trade receivables 19 13
Financial Assets Past Due but Not Impaired | Overdue 60 – 90 Days    
Disclosure Of Trade And Other Receivables [Line Items]    
Trade receivables 7 11
Financial Assets Past Due but Not Impaired | Overdue More than 90 Days    
Disclosure Of Trade And Other Receivables [Line Items]    
Trade receivables € 8 € 26