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EARNINGS PER SHARE (Tables) | 9 Months Ended
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Sep. 30, 2021
EARNINGS PER SHARE |
Schedule of basic and diluted earnings per share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, 2021 | ​ | Nine Months Ended September 30, 2021
​ |  | ​ | ​ |  | Weighted |  | Per |  | ​ | ​ |  | Weighted |  | Per
​ | ​ | ​ | ​ | ​ | Average | ​ | Common | ​ | ​ | ​ | ​ | Average | ​ | Common
​ | ​ | Net | ​ | Common | ​ | Share | ​ | Net | ​ | Common | ​ | Share
(In millions, except per share amounts) | ​ | Income | ​ | Shares | ​ | Amount | ​ | Income | ​ | Shares | ​ | Amount
Basic | ​ | $ | 283.2 |  | 42.9 | ​ | $ | 6.60 | ​ | $ | 532.9 |  | 43.3 | ​ | $ | 12.31
Effect of Dilutive Securities | ​ | ​ | ​ |  | 0.5 | ​ | ​ | (0.07) | ​ | ​ | ​ |  | 0.4 | ​ | ​ | (0.12)
Diluted | ​ | $ | 283.2 | ​ | 43.4 | ​ | $ | 6.53 | ​ | $ | 532.9 | ​ | 43.7 | ​ | $ | 12.19
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended September 30, 2020 | ​ | Nine Months Ended September 30, 2020
​ | ​ | ​ | ​ |  | Weighted |  | Per |  | ​ | ​ |  | Weighted |  | Per
​ | ​ | ​ | ​ | ​ | Average | ​ | Common | ​ | ​ | ​ | ​ | Average | ​ | Common
​ | ​ | Net | ​ | Common | ​ | Share | ​ | Net | ​ | Common | ​ | Share
(In millions, except per share amounts) | ​ | Income | ​ | Shares | ​ | Amount | ​ | Income | ​ | Shares | ​ | Amount
Basic | ​ | $ | 70.9 |  | 43.1 | ​ | $ | 1.65 | ​ | $ | 107.5 |  | 43.0 | ​ | $ | 2.50
Effect of Dilutive Securities | ​ | ​ | ​ |  | 0.4 | ​ | ​ | (0.02) | ​ | ​ | ​ |  | 0.4 | ​ | ​ | (0.02)
Diluted | ​ | $ | 70.9 | ​ | 43.5 | ​ | $ | 1.63 | ​ | $ | 107.5 | ​ | 43.4 | ​ | $ | 2.48

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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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