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Net Earnings (Loss) Per Common Share | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Net Earnings (Loss) Per Common Share | Net Earnings (Loss) Per Common Share The following table shows the calculation of basic and diluted net earnings (loss) per common share under the two-class method:
|  | Three Months Ended March 31,
(In millions, except per share amounts) |  | 2019 |  | 2018
Basic Net Earnings (Loss) Per Common Share: |  |  |  |
Numerator: |  |  |  |
Net earnings (loss) |  | $ | 57.5 |  |  | $ | (200.6 | )
Distributed and allocated undistributed net earnings to unvested restricted stockholders |  | (0.1 | ) |  | (0.2 | )
Distributed and allocated undistributed net earnings (loss) |  | 57.4 |  |  | (200.8 | )
Distributed net earnings - dividends paid to common stockholders |  | (24.8 | ) |  | (26.3 | )
Allocation of undistributed net earnings (loss) to common stockholders |  | $ | 32.6 |  |  | $ | (227.1 | )
Denominator: |  |  |  |
Weighted average number of common shares outstanding - basic |  | 154.8 |  |  | 165.3 |
Basic net earnings per common share: |  |  |  |
Distributed net earnings |  | $ | 0.16 |  |  | $ | 0.16 |
Allocated undistributed net earnings (loss) to common stockholders |  | 0.21 |  |  | (1.37 | )
Basic net earnings (loss) per common share |  | $ | 0.37 |  |  | $ | (1.21 | )
Diluted Net Earnings (Loss) Per Common Share: |  |  |  |
Numerator: |  |  |  |
Distributed and allocated undistributed net earnings (loss) |  | $ | 57.4 |  |  | $ | (200.8 | )
Add: Allocated undistributed net earnings to unvested restricted stockholders |  | 0.1 |  |  | — |
Less: Undistributed net earnings reallocated to unvested restricted stockholders |  | (0.1 | ) |  | — |
Net earnings (loss) available to common stockholders - diluted |  | $ | 57.4 |  |  | $ | (200.8 | )
Denominator: |  |  |  |
Weighted average number of common shares outstanding - basic |  | 154.8 |  |  | 165.3 |
Effect of contingently issuable shares |  | 0.2 |  |  | — |
Effect of unvested restricted stock units |  | 0.2 |  |  | — |
Weighted average number of common shares outstanding - diluted under two-class |  | 155.2 |  |  | 165.3 |
Effect of unvested restricted stock - participating security |  | 0.2 |  |  | — |
Weighted average number of common shares outstanding - diluted under treasury stock |  | 155.4 |  |  | 165.3 |
Diluted net earnings (loss) per common share |  | $ | 0.37 |  |  | $ | (1.21 | )

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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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