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Net Earnings Per Share | 3 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Net Earnings Per Share | (8) Net Earnings Per Share The calculations of net earnings per share - basic and net earnings per share - diluted were as follows:
|  | 3 Months Ended |
|  | March 31, |
|  | 2021 |  |  | 2020 |
Net earnings available to common shareholders |  | $ | 62.0 |  |  | $ | 1.7 |
Weighted-average common shares outstanding (in millions) |  |  |  |  |  |  |  |
Weighted-average common shares outstanding - basic |  |  | 55.1 |  |  |  | 58.7 |
Effect of dilutive securities - stock options |  |  | 0.1 |  |  |  | - |
Effect of other share-based awards |  |  | 0.5 |  |  |  | 0.3 |
Weighted-average common shares outstanding - diluted |  |  | 55.7 |  |  |  | 59.0 |
Net earnings per share - basic |  | $ | 1.12 |  |  | $ | 0.03 |
Net earnings per share - diluted |  | $ | 1.11 |  |  | $ | 0.03 |
There were no shares and 0.6 million share-based awards excluded from the calculation of net earnings per share - diluted for the three months ended March 31, 2021 and 2020, respectively, because their impact was anti-dilutive.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257 + Details
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