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Loss per share | 12 Months Ended
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Dec. 31, 2020
Earnings per share [abstract] |
Loss per share | Loss per shareBasic loss per share is computed using the weighted-average number of outstanding ordinary shares during the period. Diluted loss per share is computed using the treasury stock method to the extent that the effect is dilutive by using the weighted-average number of outstanding ordinary shares and potential ordinary shares during the period. The Group’s potential ordinary shares consist of incremental shares issuable upon the assumed exercise of stock options and warrants, and the incremental shares issuable upon the assumed vesting of unvested restricted stock units, restricted stock awards, and other contingently issuable shares, excluding all anti-dilutive ordinary shares outstanding during the period. The Group used the if-converted method to calculate the dilutive impact of the warrants and adjusted the numerator for changes in profit or loss. The computation of loss per share for the respective periods is as follows:
| 2020 |  | 2019 |  | 2018
| (in € millions, except share and per share data)
Basic loss per share |  |  |  |  |
Net loss attributable to owners of the parent | (581) |  |  | (186) |  |  | (78) |
Shares used in computation: |  |  |  |  |
Weighted-average ordinary shares outstanding | 187,583,307 |  |  | 180,960,579 |  |  | 177,154,405 |
Basic net loss per share attributable to owners of the parent | (3.10) |  |  | (1.03) |  |  | (0.44) |
Diluted loss per share |  |  |  |  |
Net loss attributable to owners of the parent | (581) |  |  | (186) |  |  | (78) |
Fair value gains on dilutive warrants | — |  |  | — |  |  | (14) |
Net loss used in the computation of diluted loss per share | (581) |  |  | (186) |  |  | (92) |
Shares used in computation: |  |  |  |  |
Weighted-average ordinary shares outstanding | 187,583,307 |  |  | 180,960,579 |  |  | 177,154,405 |
Warrants | — |  |  | — |  |  | 4,055,887 |
Diluted weighted average ordinary shares | 187,583,307 |  |  | 180,960,579 |  |  | 181,210,292 |
Diluted net loss per share attributable to owners of the parent | (3.10) |  |  | (1.03) |  |  | (0.51) |
Potential dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows:
| 2020 |  | 2019 |  | 2018
Employee options | 9,041,288 |  |  | 12,153,772 |  |  | 12,243,526 |
Restricted stock units | 1,320,193 |  |  | 638,350 |  |  | 100,383 |
Restricted stock awards | — |  |  | 41,280 |  |  | 61,880 |
Other contingently issuable shares | 156,190 |  |  | 162,320 |  |  | — |
Warrants | 800,000 |  |  | 2,400,000 |  |  | — |

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