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Net Income Per Share (Tables) | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Schedule of Net Income Per Share | Net income per share was calculated as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
(in millions, except per share data) | 2021 |  | 2020 |  | 2021 |  | 2020
Net income - basic and diluted | $ | 42.3 |  |  | $ | 79.6 |  |  | $ | 74.4 |  |  | $ | 117.0 |
Weighted-average common shares outstanding:
Basic | 94.6 |  |  | 93.0 |  |  | 94.4 |  |  | 92.8 |
Effect of dilutive securities:
Stock options | 1.8 |  |  | 2.6 |  |  | 1.9 |  |  | 2.5 |
Restricted stock | 0.2 |  |  | 0.5 |  |  | 0.4 |  |  | 0.5 |
2024 Notes | 1.0 |  |  | 2.1 |  |  | 1.2 |  |  | 1.8 |
Diluted | 97.7 |  |  | 98.2 |  |  | 98.0 |  |  | 97.6 |
Net income per share: |  |  |  |  |  |  |
Basic | $ | 0.45 |  |  | $ | 0.86 |  |  | $ | 0.79 |  |  | $ | 1.26 |
Diluted | $ | 0.43 |  |  | $ | 0.81 |  |  | $ | 0.76 |  |  | $ | 1.20 |
Shares excluded from diluted per share amounts because their effect would have been anti-dilutive | 4.7 |  | 2.2 |  | 3.7 |  | 1.4

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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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