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EARNINGS PER SHARE (Tables) | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Basic and Diluted Earnings Per Share Table |
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Computation of Income per Share | (In millions, except per share data)
Net income | $ | 195.1 |  |  | $ | 52.7 |  |  | $ | 274.6 |  |  | $ | 60.2 |
Basic shares | 167.0 |  |  | 166.3 |  |  | 167.1 |  |  | 166.0 |
Basic net income per share | $ | 1.17 |  |  | $ | 0.32 |  |  | $ | 1.64 |  |  | $ | 0.36 |
Diluted shares: |  |  |  |  |  |  |
Basic shares | 167.0 |  |  | 166.3 |  |  | 167.1 |  |  | 166.0 |
Stock-based compensation | 1.6 |  |  | 2.2 |  |  | 1.8 |  |  | 2.2 |
Diluted shares | 168.6 |  |  | 168.5 |  |  | 168.9 |  |  | 168.2 |
Diluted net income per share | $ | 1.16 |  |  | $ | 0.31 |  |  | $ | 1.63 |  |  | $ | 0.36 |

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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/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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