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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2022
Earnings Per Share [Abstract] |
Computations of Earnings (Loss) per Common Share | The computations of earnings per common share for the nine and three months ended September 30, 2022 and 2021were as follows:
(In millions, except per share data) |  | Nine Months Ended September 30, |  |  | Three Months Ended September 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Net income |  | $ | 577.1 |  |  | $ | 597.1 |  |  | $ | 204.2 |  |  | $ | 202.1 |
Basic earnings per common share |  | $ | 4.40 |  |  | $ | 4.32 |  |  | $ | 1.58 |  |  | $ | 1.47 |
Diluted earnings per common share |  | $ | 4.37 |  |  | $ | 4.26 |  |  | $ | 1.57 |  |  | $ | 1.45 |
Basic average shares outstanding |  |  | 131.0 |  |  |  | 138.3 |  |  |  | 129.3 |  |  |  | 137.8 |
Stock-based awards |  |  | 1.0 |  |  |  | 1.9 |  |  |  | 0.8 |  |  |  | 1.9 |
Diluted average shares outstanding |  |  | 132.0 |  |  |  | 140.2 |  |  |  | 130.1 |  |  |  | 139.7 |
Antidilutive stock-based awards excluded from weighted- average number of shares outstanding for diluted earnings per share |  |  | 1.2 |  |  |  | 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 https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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