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Earnings per Share (Tables) | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Computations of basic and diluted loss per share for Loss from Continuing Operations | The computations of basic and diluted earnings per share for Income from continuing operations were as follows (in millions, except per share data):
| For the Years Ended December 31,
| 2020 |  | 2019 |  | 2018
Net income | $ | 356.3 |  |  | $ | 408.7 |  |  | $ | 359.0 |
Add: Loss from discontinued operations | 0.8 |  |  | 0.1 |  |  | 1.3 |
Income from continuing operations | $ | 357.1 |  |  | $ | 408.8 |  |  | $ | 360.3 |
Weighted-average shares outstanding – basic | 38.3 |  |  | 39.0 |  |  | 40.6 |
Add: Potential effect of diluted securities attributable to stock-based payments | 0.3 |  |  | 0.4 |  |  | 0.5 |
Weighted-average shares outstanding – diluted | 38.6 |  |  | 39.4 |  |  | 41.1 |
Earnings per share - Basic: |  |  |  |  |
Income from continuing operations | $ | 9.32 |  |  | $ | 10.49 |  |  | $ | 8.87 |
Loss from discontinued operations | (0.02) |  |  | — |  |  | (0.03) |
Net income | $ | 9.30 |  |  | $ | 10.49 |  |  | $ | 8.84 |
Earnings per share - Diluted: |  |  |  |  |
Income from continuing operations | $ | 9.26 |  |  | $ | 10.38 |  |  | $ | 8.77 |
Loss from discontinued operations | (0.02) |  |  | — |  |  | (0.03) |
Net income | $ | 9.24 |  |  | $ | 10.38 |  |  | $ | 8.74 |

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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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