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Earnings Per Share | 12 Months Ended
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Dec. 31, 2019
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share The computations of the weighted average shares outstanding for the years ended December 31, are as follows (in millions):
| 2019 |  | 2018 |  | 2017
Weighted-average shares outstanding | 423.2 |  |  | 473.3 |  |  | 485.7 |
Share-based payment awards classified as participating securities | 0.1 |  |  | 0.4 |  |  | 1.0 |
Basic weighted-average shares outstanding | 423.3 |  |  | 473.7 |  |  | 486.7 |
Dilutive securities (1) | 0.6 |  |  | — |  |  | 1.3 |
Diluted weighted-average shares outstanding | 423.9 |  |  | 473.7 |  |  | 488.0 |
(1) | For 2018, 0.6 million potentially dilutive share-based awards are excluded as their effect would be anti-dilutive. For 2017, the amount of potentially dilutive securities that are excluded because their effect would be anti-dilutive are not material.
At December 31, 2019, there were 0.5 million potentially dilutive restricted share awards with performance-based vesting targets that were not met and as such, have been excluded from the computation of diluted earnings per share. For 2019, 2018 and 2017 dividends and equivalents for share-based awards expected to be forfeited did not have a material impact on net income for basic and diluted earnings per share.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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