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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2017
Earnings Per Share [Abstract] |
Schedule of Computations of Weighted Average Shares Outstanding | The computations of the weighted average shares outstanding for the periods indicated are as follows (in millions):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Weighted-average shares outstanding |  |  | 489.6 |  |  |  | 482.3 |  |  |  | 485.2 |  |  |  | 396.9 |
Share-based payment awards classified as participating securities |  |  | 0.8 |  |  |  | 1.7 |  |  |  | 1.1 |  |  |  | 1.4 |
Basic weighted-average shares outstanding |  |  | 490.4 |  |  |  | 484.0 |  |  |  | 486.3 |  |  |  | 398.3 |
Dilutive securities (1) |  |  | 1.1 |  |  |  | 2.2 |  |  |  | 1.6 |  |  |  | 1.8 |
Diluted weighted-average shares outstanding |  |  | 491.5 |  |  |  | 486.2 |  |  |  | 487.9 |  |  |  | 400.1 |
(1) | For the three and nine months ended September 31, 2017 and 2016 the amount of potentially dilutive securities that are excluded because their effect would be anti-dilutive are not material.

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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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