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EARNINGS PER-SHARE (Tables) | 12 Months Ended
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Dec. 31, 2019
EARNINGS PER-SHARE |
Schedule of basic and diluted earnings per share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, 2019 | ​ | Year Ended December 31, 2018 | ​ | Year Ended December 31, 2017 |
​ |  | ​ | ​ |  | Weighted |  | Per |  | ​ | ​ |  | Weighted |  | Per |  | ​ | ​ |  | Weighted |  | Per |
​ | ​ | ​ | ​ | ​ | Average | ​ | Common | ​ | ​ | ​ | ​ | Average | ​ | Common | ​ | ​ | ​ | ​ | Average | ​ | Common |
​ | ​ | Net | ​ | Common | ​ | Share | ​ | Net | ​ | Common | ​ | Share | ​ | Net | ​ | Common | ​ | Share |
(In millions, except per share amounts) | ​ | Income | ​ | Shares | ​ | Amount | ​ | Income | ​ | Shares | ​ | Amount | ​ | Income | ​ | Shares | ​ | Amount |
Basic: | ​ | $ | 82.7 |  | 42.8 | ​ | $ | 1.93 | ​ | $ | 109.0 |  | 42.7 | ​ | $ | 2.55 | ​ | $ | 231.0 |  | 42.9 | ​ | $ | 5.38 | ​
Effect of Dilutive Securities: | ​ | ​ | ​ |  | 0.5 | ​ | ​ | (0.02) | ​ | ​ | ​ |  | 0.3 | ​ | ​ | (0.02) | ​ | ​ | ​ |  | 0.3 | ​ | ​ | (0.03) | ​
Diluted: | ​ | $ | 82.7 | ​ | 43.3 | ​ | $ | 1.91 | ​ | $ | 109.0 | ​ | 43.0 | ​ | $ | 2.53 | ​ | $ | 231.0 | ​ | 43.2 | ​ | $ | 5.35 | ​

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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://fasb.org/us-gaap/role/ref/legacyRef -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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