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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Schedule of Weighted Average Number of Shares | A reconciliation of basic weighted-average shares outstanding to diluted weighted-average shares outstanding is as follows:
|  | Year Ended December 31,
|  | 2021 |  | 2020 |  | 2019
Basic weighted-average shares outstanding |  | 138.5 |  |  | 142.6 |  |  | 145.1 |
Effect of dilutive securities (1) |  | 2.0 |  |  | 2.2 |  |  | 2.7 |
Diluted weighted-average shares outstanding (2) |  | 140.5 |  |  | 144.8 |  |  | 147.8 |
(1) The dilutive effect of outstanding stock options, restricted stock units, performance share units and Coworker Stock Purchase Plan (“CSPP”) units is reflected in the diluted weighted-average shares outstanding using the treasury stock method. (2) There were fewer than 0.1 million potential common shares excluded from diluted weighted-average shares outstanding for the years ended December 31, 2021, 2020 and 2019, respectively, as their inclusion would have had an anti-dilutive effect.

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + 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=124432515&loc=d3e3550-109257 + Details
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