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Earnings per Common Share | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Earnings per Common Share | Earnings per Common Share Basic earnings per common share is calculated by dividing Net earnings by the weighted average outstanding shares which includes vested, unissued equity awards during the period. Diluted earnings per common share is calculated similarly, except that the calculation includes the dilutive effect of stock-settled SARs, non-vested stock awards and performance awards. Basic and diluted earnings per common share for the years ended December 31, 2017, 2016 and 2015 were calculated as follows:
(in millions, except per share data) | 2017 |  | 2016 |  | 2015
Net earnings from continuing operations | $ | 187.3 |  |  | $ | 272.6 |  |  | $ | 230.9 |
Earnings (loss) from discontinued operations, net of tax | (40.9 | ) |  | 3.4 |  |  | 10.5 |
Net earnings | $ | 146.4 |  |  | $ | 276.0 |  |  | $ | 241.4 |
Weighted average outstanding shares-basic | 89.4 |  |  | 91.2 |  |  | 93.0 |
Dilutive effect of common stock equivalents | 0.7 |  |  | 0.8 |  |  | 1.3 |
Weighted average outstanding shares-diluted | 90.1 |  |  | 92.0 |  |  | 94.3 |
Basic earnings (loss) per common share: |  |  |  |  |
Continuing operations | $ | 2.10 |  |  | $ | 2.99 |  |  | $ | 2.49 |
Discontinued operations | (0.46 | ) |  | 0.04 |  |  | 0.11 |
Net earnings | $ | 1.64 |  |  | $ | 3.03 |  |  | $ | 2.60 |
Diluted earnings (loss) per common share: |  |  |  |  |
Continuing operations | $ | 2.08 |  |  | $ | 2.96 |  |  | $ | 2.45 |
Discontinued operations | (0.46 | ) |  | 0.04 |  |  | 0.11 |
Net earnings | $ | 1.62 |  |  | $ | 3.00 |  |  | $ | 2.56 |
Share awards that were not included in the computation of diluted earnings per share because their inclusion was anti-dilutive were immaterial for all periods presented.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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