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Earnings Per Share | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings per Share We compute basic earnings per share by dividing net income available to our common shareholders by the weighted-average number of shares of our common stock outstanding. We weight shares issued or reacquired for the portion of the period that they were outstanding. Our diluted earnings per share reflect the impacts of our potentially dilutive securities, which include our equity compensation awards. The following table shows the computation of our basic and diluted net income per common share (in millions, except per share amounts):
| Three Months Ended March 31
| 2019 |  | 2018
Numerator: |  |  |
Net income | $ | 41.5 |  |  | $ | 76.3 |
Denominator: |  |  |
Weighted-average shares outstanding - basic | 36.5 |  |  | 37.9 |
Effect of dilutive securities: |  |  |
Equity compensation plans | 0.6 |  |  | 0.6 |
Weighted-average shares outstanding - diluted | 37.1 |  |  | 38.5 |
Basic earnings per share | $ | 1.14 |  |  | $ | 2.02 |
Diluted earnings per share | $ | 1.12 |  |  | $ | 1.98 |

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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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