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Earnings Per Share (Tables) | 3 Months Ended
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Apr. 01, 2018
Earnings Per Share [Abstract] |
Reconciliation of Basic and Diluted Earnings Per Share | The reconciliation of basic and diluted earnings per share on common stock for the first quarter 2018 and 2017 follows (in millions of dollars except per share data):
| First Quarter
| 2018 |  | 2017
Net earnings | $ | 29.1 |  |  | $ | 12.2 |
Less: earnings allocated to participating securities | (0.4 | ) |  | (0.2 | )
Net earnings available to common shareholders | $ | 28.7 |  |  | $ | 12.0 |
Average shares outstanding (millions): |  |  |
Basic | 38.6 |  |  | 38.3 |
Dilutive share awards | 0.3 |  |  | 0.4 |
Diluted | 38.9 |  |  | 38.7 |
Basic earnings per share | $ | 0.74 |  |  | $ | 0.31 |
Diluted earnings per share | $ | 0.74 |  |  | $ | 0.31 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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