v3.10.0.1
Loss Per Share - Summary of Computation of Loss Per Share (Details) - EUR (€)
€ / shares in Units, € in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Basic loss per share      
Net loss attributable to owners of the parent € (78) € (1,235) € (539)
Weighted-average ordinary shares outstanding 177,154,405 151,668,769 148,368,720
Basic € (0.44) € (8.14) € (3.63)
Diluted loss per share      
Net loss attributable to owners of the parent € (78) € (1,235) € (539)
Fair value adjustments on warrants (14)    
Net loss used in the computation of diluted loss per share € (92) € (1,235) € (539)
Weighted-average ordinary shares outstanding      
Weighted-average ordinary shares outstanding 177,154,405 151,668,769 148,368,720
Warrants 4,055,887    
Diluted weighted average ordinary shares 181,210,292 151,668,769 148,368,720
Diluted € (0.51) € (8.14) € (3.63)