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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2014
Earnings (Loss) per Share (EPS) [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table sets forth the computation of our basic and diluted EPS:
|  | Three Months Ended |  | Nine Months Ended
|  | September 30, |  | September 30,
|  | 2014 |  | 2013 |  | 2014 |  | 2013
|  | (in millions, except per share data)
Numerator |  |  |  |  |  |  |  |
Net income |  | $ | 48.6 |  |  | $ | 31.6 |  |  | $ | 134.4 |  |  | $ | 64.7 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |
Basic shares outstanding - |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average shares outstanding |  | 77.4 |  |  | 76.9 |  |  | 77.2 |  |  | 76.6 |
Effect of dilutive securities |  |  |  |  |  |  |  |  |  |  |  |
Dilutive stock-based compensation |  | 0.2 |  |  | 0.1 |  |  | 0.2 |  |  | 0.1 |
Diluted shares outstanding - |  |  |  |  |  |  |  |  |  |  |  |
Adjusted weighted-average shares after assumed conversions |  | 77.6 |  |  | 77.0 |  |  | 77.4 |  |  | 76.7 |
Basic EPS |  | $ | 0.63 |  |  | $ | 0.41 |  |  | $ | 1.74 |  |  | $ | 0.84 |
Diluted EPS |  | $ | 0.63 |  |  | $ | 0.41 |  |  | $ | 1.74 |  |  | $ | 0.84 |

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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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