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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2019
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 June 30, |  | Six Months Ended June 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Weighted-average shares outstanding | 423.2 |  |  | 485.8 |  |  | 423.1 |  |  | 485.6 |
Share-based payment awards classified as participating securities (1) | 0.1 |  |  | 0.4 |  |  | 0.2 |  |  | 0.5 |
Basic weighted-average shares outstanding | 423.3 |  |  | 486.2 |  |  | 423.3 |  |  | 486.1 |
Dilutive securities (2) | 0.2 |  |  | — |  |  | 0.3 |  |  | — |
Diluted weighted-average shares outstanding | 423.5 |  |  | 486.2 |  |  | 423.6 |  |  | 486.1 |
(1) | For the three months ended June 30, 2019 and 2018, dividends and equivalents for share-based awards that are expected to be forfeited do not have a material effect on net income for basic and diluted earnings per share.
(2) The three and six months ended June 30, 2018 excludes 0.8 million and 0.9 million potentially dilutive share-based awards as their effect would be anti-dilutive.

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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://fasb.org/us-gaap/role/ref/legacyRef -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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