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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2024
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 second quarter and June year-to-date 2024 and 2023 follows (in millions of dollars except per share data):
| Second Quarter |  | June Year to Date
| 2024 |  | 2023 |  | 2024 |  | 2023
Net earnings | $ | 4.6 |  |  | $ | 7.5 |  |  | $ | 30.4 |  |  | $ | 18.4 |
Less: earnings allocated to participating securities | (0.1) |  |  | (0.2) |  |  | (0.7) |  |  | (0.4) |
Net earnings available to common shareholders | $ | 4.5 |  |  | $ | 7.3 |  |  | $ | 29.7 |  |  | $ | 18.0 |
Average shares outstanding (millions): |  |  |  |  |  |  |
Basic | 35.5 |  |  | 36.0 |  |  | 35.5 |  |  | 36.5 |
Dilutive share awards | 0.4 |  |  | 0.4 |  |  | 0.4 |  |  | 0.4 |
Diluted | 35.9 |  |  | 36.4 |  |  | 35.9 |  |  | 36.9 |
Basic earnings per share | $ | 0.13 |  |  | $ | 0.20 |  |  | $ | 0.84 |  |  | $ | 0.49 |
Diluted earnings per share | $ | 0.12 |  |  | $ | 0.20 |  |  | $ | 0.83 |  |  | $ | 0.49 |

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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/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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