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Earnings (Loss) Per Share (Tables) | 3 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Basic and diluted earnings (loss) per share | The following table shows the basic and diluted earnings (loss) per share:
| For the three months ended March 31
| 2021 |  | 2020
| Net Income (Loss) |  | Shares (in millions) |  | Per Share |  | Net Income (Loss) |  | Shares (in millions) |  | Per Share
Net income (loss) | $ | (140.0) |  |  |  |  |  |  | $ | (2.7) |  |  |  |  |
Amount allocated to common stockholders | 100.0 | % |  |  |  |  |  | 100.0 | % |  |  |  |
Basic and diluted EPS(1) | $ | (140.0) |  |  | 90.1 |  |  | $ | (1.55) |  |  | $ | (2.7) |  |  | 89.3 |  |  | $ | (0.03) |
(1) In periods when we report a net loss, all share-based compensation awards and convertible preferred shares are excluded from the calculation of diluted weighted average shares outstanding because of their anti-dilutive effect on earnings (loss) per share.
Securities excluded from the calculation of diluted EPS |
| Three months ended March 31, |  |  |  |
Securities excluded from the calculation of diluted EPS (in millions)(1): | 2021 |  | 2020 |  |  |  |  |  |  |  |
Share-based compensation | 2.2 |  |  | 0.4 |  |  |  |  |  |  |  |  |
Convertible preferred shares(2) | 6.4 |  |  | — |  |  |  |  |  |  |  |  |
(1) In periods when we report a net loss, all share-based compensation awards and convertible preferred shares are excluded from the calculation of diluted weighted average shares outstanding because of their anti-dilutive effect on earnings (loss) per share. (2) Convertible preferred shares are considered in diluted EPS using the if-converted method in accordance with our adoption of ASU 2020-06 effective January 1, 2021 using a modified retrospective approach.

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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