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Net Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2017
Earnings Per Share [Abstract] |
Calculations of net earnings per share basic and diluted | The calculations of net earnings per share – basic and net earnings per share – diluted were as follows:
| 3 Months Ended
| March 31,
| 2017 |  | 2016
Net earnings available to common shareholders | $ | 74.4 |  |  | $ | 71.7 |
Weighted-average common shares outstanding (in millions) |  |  |
Weighted-average common shares outstanding - basic | 67.7 |  |  | 72.8 |
Effect of dilutive securities - stock options | 0.2 |  |  | 0.3 |
Effect of other share-based awards | 0.5 |  |  | 0.4 |
Weighted-average common shares outstanding - diluted | 68.4 |  |  | 73.5 |
Net earnings per share - basic | $ | 1.10 |  |  | $ | 0.98 |
Net earnings per share - diluted | $ | 1.09 |  |  | $ | 0.98 |

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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/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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