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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2015
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted |
|  | Three Months Ended
|  | March 31,
(in millions) |  | 2015 |  | 2014
Net income |  | $ | 1.1 |  |  | $ | 8.4 |
Weighted average shares for basic EPS |  | 136.9 |  |  | 97.0 |
Dilutive potential shares from grants of RSUs, PRSUs and stock options(a) |  | 0.7 |  |  | — |
Weighted average shares for diluted EPS |  | 137.6 |  |  | 97.0 |
(a) | The potential impact of an aggregate 0.4 million granted RSUs, PRSUs and stock options for the three months ended March 31, 2015, was 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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