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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2024
Earnings Per Share [Abstract] |
Computation of basic and diluted net income per common share | The following table shows the computation of our basic and diluted earnings per common share (in millions, except per share amounts):
| Three Months Ended March 31 |  |
| 2024 |  | 2023 |  |  |  |
Basic earnings per share: |  |  |  |  |  |  |
Net income | $ | 74.3 |  |  | $ | 77.4 |  |  |  |  |
Less: Net income allocated to participating securities | (1.4) |  |  | — |  |  |  |  |
Net income available to common shareholders | $ | 72.9 |  |  | $ | 77.4 |  |  |  |  |
Weighted-average shares outstanding - basic | 35.8 |  |  | 35.3 |  |  |  |  |
Basic earnings per share | $ | 2.04 |  |  | $ | 2.19 |  |  |  |  |
Diluted earnings per share: |  |  |  |  |  |  |
Net income | $ | 74.3 |  |  | $ | 77.4 |  |  |  |  |
Less: Net income allocated to participating securities | (1.4) |  |  | — |  |  |  |  |
Net income available to common shareholders | $ | 72.9 |  |  | $ | 77.4 |  |  |  |  |
Weighted-average shares outstanding - basic | 35.8 |  |  | 35.3 |  |  |  |  |
Effect of dilutive securities: |  |  |  |  |  |  |
Equity compensation plans | 0.1 |  |  | 0.5 |  |  |  |  |
Weighted-average shares outstanding - diluted | 35.9 |  |  | 35.8 |  |  |  |  |
Diluted earnings per share | $ | 2.03 |  |  | $ | 2.16 |  |  |  |  |

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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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