v3.19.3.a.u2
Segment Information - Summary of Revenue by Geographic Area (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of Operating Segments [Line Items]      
Revenue € 6,764 € 5,259 € 4,090
United States      
Disclosure Of Operating Segments [Line Items]      
Revenue 2,542 1,973 1,577
United Kingdom      
Disclosure Of Operating Segments [Line Items]      
Revenue 727 576 444
Luxembourg      
Disclosure Of Operating Segments [Line Items]      
Revenue 4 3 3
Other Countries      
Disclosure Of Operating Segments [Line Items]      
Revenue € 3,491 € 2,707 € 2,066