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Earnings per Share (Tables) | 12 Months Ended
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Dec. 31, 2023
Earnings Per Share [Abstract] |
Computations of basic and diluted loss per share for Loss from Continuing Operations | The computations of basic and diluted earnings per share were as follows (in millions, except per share data):
| For the Years Ended December 31,
| 2023 |  | 2022 |  | 2021
Net income | $ | 590.1 |  |  | $ | 497.1 |  |  | $ | 464.0 |
Weighted-average shares outstanding – basic | 35.5 |  |  | 35.7 |  |  | 37.2 |
Add: Potential effect of diluted securities attributable to stock-based payments | 0.2 |  |  | 0.1 |  |  | 0.3 |
Weighted-average shares outstanding – diluted | $ | 35.7 |  |  | $ | 35.8 |  |  | $ | 37.5 |
Earnings per share - Basic: |  |  |  |  |
Net income | $ | 16.61 |  |  | $ | 13.92 |  |  | $ | 12.47 |
Earnings per share - Diluted: |  |  |  |  |
Net income | $ | 16.54 |  |  | $ | 13.88 |  |  | $ | 12.39 |

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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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