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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2017
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | Basic and diluted weighted average shares outstanding and earnings per share were as follows:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
(in millions, except per share data) |  | 2017 |  | 2016 |  | 2017 |  | 2016
Earnings per share - basic |  |  |  |  |  |  |  |
Earnings available to common stockholders |  | $ | 64.9 |  |  | $ | 17.3 |  |  | $ | 127.3 |  |  | $ | 29.9 |
Weighted average basic shares outstanding |  | 181.9 |  |  | 182.5 |  |  | 182.3 |  |  | 182.4 |
Earnings per share - basic |  | $ | 0.36 |  |  | $ | 0.09 |  |  | $ | 0.70 |  |  | $ | 0.16 |
Earnings per share - diluted |  |  |  |  |  |  |  |
Earnings available to common stockholders |  | $ | 64.9 |  |  | $ | 17.3 |  |  | $ | 127.3 |  |  | $ | 29.9 |
Weighted average basic shares outstanding |  | 181.9 |  |  | 182.5 |  |  | 182.3 |  |  | 182.4 |
Dilutive impact of stock based awards |  | 7.4 |  |  | 1.9 |  |  | 7.5 |  |  | 1.8 |
Weighted average dilutive shares outstanding |  | 189.3 |  |  | 184.4 |  |  | 189.8 |  |  | 184.2 |
Earnings per share - diluted |  | $ | 0.34 |  |  | $ | 0.09 |  |  | $ | 0.67 |  |  | $ | 0.16 |

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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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