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Earnings Per Share | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share: Basic earnings per share are computed by dividing net income by the weighted-average number of common shares outstanding during the period. Diluted earnings per share are computed by dividing net income by the sum of the weighted-average number of shares and the number of equivalent shares assumed outstanding, if dilutive, under our stock-based compensation plans. The computations of basic and diluted earnings per share for Income from continuing operations were as follows (in millions, except per share data):
| For the Years Ended December 31,
| 2018 |  | 2017 |  | 2016
Net income | $ | 359.0 |  |  | $ | 305.7 |  |  | $ | 277.8 |
Add: Loss from discontinued operations | 1.3 |  |  | 1.4 |  |  | 0.8 |
Income from continuing operations | $ | 360.3 |  |  | $ | 307.1 |  |  | $ | 278.6 |
Weighted-average shares outstanding – basic | 40.6 |  |  | 42.2 |  |  | 43.4 |
Add: Potential effect of diluted securities attributable to stock-based payments | 0.5 |  |  | 0.6 |  |  | 0.6 |
Weighted-average shares outstanding – diluted | 41.1 |  |  | 42.8 |  |  | 44.0 |
Earnings per share - Basic: |  |  |  |  |
Income from continuing operations | $ | 8.87 |  |  | $ | 7.28 |  |  | $ | 6.41 |
Loss from discontinued operations | (0.03 | ) |  | (0.03 | ) |  | (0.02 | )
Net income | $ | 8.84 |  |  | $ | 7.25 |  |  | $ | 6.39 |
Earnings per share - Diluted: |  |  |  |  |
Income from continuing operations | $ | 8.77 |  |  | $ | 7.17 |  |  | $ | 6.34 |
Loss from discontinued operations | (0.03 | ) |  | (0.03 | ) |  | (0.02 | )
Net income | $ | 8.74 |  |  | $ | 7.14 |  |  | $ | 6.32 |
An insignificant number of stock appreciation rights were outstanding but not included in the diluted earnings per share calculation because the assumed exercise of such rights would have been anti-dilutive.

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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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