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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following table shows the calculation of basic and diluted earnings per share (in millions, except per share data).
| Three Months Ended |  | Nine Months Ended |  |
| September 30, |  | September 30, |  |
| 2021 |  | 2020 |  | 2021 |  | 2020 |  |  |  |
Income from continuing operations, net of income taxes | $ | 66.3 |  |  | $ | 46.7 |  |  | $ | 166.4 |  |  | $ | 129.3 |  |  |  |  |
Income from discontinued operations, net of income taxes | 145.7 |  |  | 5.6 |  |  | 158.5 |  |  | 15.6 |  |  |  |  |
Net income | $ | 212.0 |  |  | $ | 52.3 |  |  | $ | 324.9 |  |  | $ | 144.9 |  |  |  |  |
Weighted-average number of common shares outstanding - basic | 52.7 |  |  | 52.5 |  |  | 53.0 |  |  | 52.6 |  |  |  |  |
Dilutive effect of common share equivalents | 0.7 |  |  | 0.5 |  |  | 0.7 |  |  | 0.5 |  |  |  |  |
Weighted-average number of common shares and share equivalents outstanding - diluted | 53.4 |  |  | 53.0 |  |  | 53.7 |  |  | 53.1 |  |  |  |  |
Basic earnings per share: |  |  |  |  |  |  |  |  |  |  |
Continuing operations | $ | 1.26 |  |  | $ | 0.89 |  |  | $ | 3.14 |  |  | $ | 2.46 |  |  |  |  |
Discontinued operations | 2.76 |  |  | 0.11 |  |  | 2.99 |  |  | 0.29 |  |  |  |  |
| $ | 4.02 |  |  | $ | 1.00 |  |  | $ | 6.13 |  |  | $ | 2.75 |  |  |  |  |
Diluted earnings per share: |  |  |  |  |  |  |  |  |  |  |
Continuing operations | $ | 1.24 |  |  | $ | 0.88 |  |  | $ | 3.10 |  |  | $ | 2.44 |  |  |  |  |
Discontinued operations | 2.73 |  |  | 0.11 |  |  | 2.95 |  |  | 0.29 |  |  |  |  |
| $ | 3.97 |  |  | $ | 0.99 |  |  | $ | 6.05 |  |  | $ | 2.73 |  |  |  |  |

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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=124432515&loc=d3e3550-109257 + Details
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