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Earnings Per Share | 12 Months Ended
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Dec. 31, 2020
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):
| 2020 |  | 2019 |  | 2018
Weighted-average shares outstanding | 424.1 |  |  | 423.2 |  |  | 473.3 |
Share-based payment awards classified as participating securities | — |  |  | 0.1 |  |  | 0.4 |
Basic weighted-average shares outstanding | 424.1 |  |  | 423.3 |  |  | 473.7 |
Dilutive securities (1) | — |  |  | 0.6 |  |  | — |
Diluted weighted-average shares outstanding | 424.1 |  |  | 423.9 |  |  | 473.7 |
(1)For 2020 and 2018, 1.1 million and 0.6 million, respectively, potentially dilutive share-based awards are excluded as their effect would be anti-dilutive. At December 31, 2020, there were no 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. At December 31, 2019 and 2018 there were 0.5 million and 1.6 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 2020, 2019 and 2018 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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