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Net Earnings Per Share | 12 Months Ended
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Dec. 31, 2015
Earnings Per Share [Abstract] |
Net Earnings Per Share | Net Earnings Per Share The calculation of net earnings per share - basic and net earnings per share - diluted were as follows:
Year Ended December 31 | 2015 |  | 2014 |  | 2013 |
Net earnings available to common shareholders: | $ | 419.2 |  | $ | 427.6 |  | $ | 288.0 |
Weighted-average common shares outstanding (in millions): |  |  |
Weighted-average common shares outstanding - basic | 76.8 |  | 79.5 |  | 78.0 |
Effect of dilutive securities - stock options | 0.5 |  | 0.6 |  | 0.8 |
Effect of other share-based awards (in millions) | 0.4 |  | 0.6 |  | 0.8 |
Weighted-average common shares outstanding - diluted | 77.7 |  | 80.7 |  | 79.6 |
Net earnings per share - basic | $ | 5.46 |  | $ | 5.38 |  | $ | 3.69 |
Net earnings per share - diluted | $ | 5.40 |  | $ | 5.30 |  | $ | 3.62 |
There were certain share-based awards excluded from the calculation of net earnings per share - diluted for the year ended December 31, 2015, 2014 and 2013, respectively, as the exercise prices for these awards were greater than the average market price of the common shares during the period. The number, exercise prices and weighted-average remaining life of these antidilutive awards were as follows:
| 2015 |  | 2014 |  | 2013 |
Shares (in thousands) | 20 |  | 692 |  | 995 |
Exercise price ranges | $ | 93 |  | $76-$93 |  | $67-$93 |
Weighted-average remaining life | 1.4 years |  | 4.1 years |  | 5.2 years |

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