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) |