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Net Income Per Common Share Computations | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Net Income Per Common Share Computations | NET INCOME PER COMMON SHARE COMPUTATIONS The following is a reconciliation of the numerator and denominator of the net income per common share computations:
| Years Ended December 31,
(in millions, except per share data) | 2018 |  | 2017 |  | 2016
Numerator for basic net income per common share: |  |  |  |  |
Net income from continuing operations | $ | 182.6 |  |  | $ | 122.4 |  |  | $ | 96.7 |
Net income from continuing operations allocated to participating securities | — |  |  | (0.1 | ) |  | (1.0 | )
Net income from discontinued operations | 170.2 |  |  | 18.1 |  |  | 11.4 |
Numerator for basic net income per common share | $ | 352.8 |  |  | $ | 140.4 |  |  | $ | 107.1 |
Numerator for diluted net income from continuing operations per common share | $ | 182.6 |  |  | $ | 122.4 |  |  | $ | 96.7 |
Numerator for diluted net income per common share | $ | 352.8 |  |  | $ | 140.5 |  |  | $ | 108.1 |
Denominator for net income per common share: |  |  |  |  |
Basic | 41.3 |  |  | 47.2 |  |  | 49.3 |
Plus dilutive effect of stock awards | 0.3 |  |  | 0.6 |  |  | 0.6 |
Plus dilutive effect of participating securities | — |  |  | 0.2 |  |  | 0.6 |
Diluted | 41.6 |  |  | 48.0 |  |  | 50.5 |
Net income per common share data: |  |  |  |  |
Basic |  |  |  |  |
Continuing operations | $ | 4.42 |  |  | $ | 2.59 |  |  | $ | 1.94 |
Discontinued operations | $ | 4.12 |  |  | $ | 0.38 |  |  | $ | 0.23 |
Net income per common share - basic | $ | 8.54 |  |  | $ | 2.97 |  |  | $ | 2.17 |
Diluted |  |  |  |  |  |  |
Continuing operations | $ | 4.39 |  |  | $ | 2.55 |  |  | $ | 1.92 |
Discontinued operations | $ | 4.09 |  |  | $ | 0.37 |  |  | $ | 0.22 |
Net income per common share - diluted | $ | 8.48 |  |  | $ | 2.92 |  |  | $ | 2.14 |

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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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