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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2015
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted |
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
(in millions) |  | 2015 |  | 2014 |  | 2015 |  | 2014
Net income |  | $ | 22.2 |  |  | $ | 22.4 |  |  | $ | 23.3 |  |  | $ | 30.8 |
Weighted average shares for basic EPS |  | 137.4 |  |  | 119.7 |  |  | 137.1 |  |  | 108.4 |
Dilutive potential shares from grants of RSUs, PRSUs and stock options(a) |  | 0.4 |  |  | 0.2 |  |  | 0.5 |  |  | 0.2 |
Weighted average shares for diluted EPS |  | 137.8 |  |  | 119.9 |  |  | 137.6 |  |  | 108.6 |
(a) | The potential impact of an aggregate 0.2 million granted RSUs, PRSUs and stock options for the three months ended June 30, 2015, and an aggregate 0.1 million granted RSUs, PRSUs and stock options for the six months ended June 30, 2015, were antidilutive.

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + 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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