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Net Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2013
Net Earnings Per Share [Abstract] |
Net Earnings Per Share | The calculations of net earnings per share – basic and net earnings per share – diluted were as follows:
|  | 3 Months Ended |  |  | 6 Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Net earnings per share – basic: |  |  |  |  |  |  |  |  |  |  |  |
Net earnings available to common shareholders |  | $ | 68.2 |  |  | $ | 41.0 |  |  | $ | 92.1 |  |  | $ | 81.2 |
Weighted-average common shares outstanding |  |  | 77.4 |  |  |  | 80.1 |  |  |  | 77.3 |  |  |  | 80.1 |
|  | $ | 0.88 |  |  | $ | 0.51 |  |  | $ | 1.19 |  |  | $ | 1.01 |
Net earnings per share – diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings available to common shareholders |  | $ | 68.2 |  |  | $ | 41.0 |  |  | $ | 92.1 |  |  | $ | 81.2 |
Weighted-average common shares outstanding |  |  | 77.4 |  |  |  | 80.1 |  |  |  | 77.3 |  |  |  | 80.1 |
Effect of dilutive securities – stock options |  |  | 0.6 |  |  |  | 0.2 |  |  |  | 0.6 |  |  |  | 0.3 |
Effect of other share-based awards |  |  | 0.6 |  |  |  | 0.1 |  |  |  | 0.7 |  |  |  | 0.4 |
|  |  | 78.6 |  |  |  | 80.4 |  |  |  | 78.6 |  |  |  | 80.8 |
|  | $ | 0.87 |  |  | $ | 0.51 |  |  | $ | 1.17 |  |  | $ | 1.01 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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