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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2022
Earnings Per Share [Abstract] |
Computations of Earnings (Loss) per Common Share | The computations of earnings per common share for the six and three months ended June 30, 2022 and 2021 were as follows:
(In millions, except per share data) |  | Six Months Ended June 30, |  |  | Three Months Ended June 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Net income |  | $ | 372.9 |  |  | $ | 395.0 |  |  | $ | 192.0 |  |  | $ | 217.2 |
Basic earnings per common share |  | $ | 2.83 |  |  | $ | 2.85 |  |  | $ | 1.47 |  |  | $ | 1.57 |
Diluted earnings per common share |  | $ | 2.80 |  |  | $ | 2.81 |  |  | $ | 1.46 |  |  | $ | 1.55 |
Basic average shares outstanding |  |  | 131.9 |  |  |  | 138.5 |  |  |  | 130.3 |  |  |  | 138.4 |
Stock-based awards |  |  | 1.1 |  |  |  | 2.0 |  |  |  | 0.9 |  |  |  | 2.0 |
Diluted average shares outstanding |  |  | 133.0 |  |  |  | 140.5 |  |  |  | 131.2 |  |  |  | 140.4 |
Antidilutive stock-based awards excluded from weighted- average number of shares outstanding for diluted earnings per share |  |  | 1.0 |  |  |  | 0.3 |  |  |  | 1.6 |  |  |  | 0.4 |

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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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