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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2025
Earnings Per Share [Abstract] |
Summary of Computation of Earnings Per Share | The computation of earnings per share for the three and six months ended June 30, 2025 and 2024 was as follows:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
(in millions except per share data) |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Net income (loss) |  | $ | 29.2 |  |  | $ | (125.2 | ) |  | $ | 16.0 |  |  | $ | (131.5 | )
Determination of shares: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average number of common shares outstanding |  |  | 91.6 |  |  |  | 96.8 |  |  |  | 92.5 |  |  |  | 96.3 |
Shares issuable on exercise of stock awards, net of shares assumed to be purchased out of proceeds at average market price |  |  | 1.5 |  |  |  | — |  |  |  | 1.8 |  |  |  | — |
Average common shares outstanding for fully diluted computation(1) |  |  | 93.1 |  |  |  | 96.8 |  |  |  | 94.3 |  |  |  | 96.3 |
Per share: |  |  |  |  |  |  |  |  |  |  |  |
Basic income (loss) per share |  | $ | 0.32 |  |  | $ | (1.29 | ) |  | $ | 0.17 |  |  | $ | (1.37 | )
Diluted income (loss) per share |  | $ | 0.31 |  |  | $ | (1.29 | ) |  | $ | 0.17 |  |  | $ | (1.37 | )
Shares outstanding as of June 30, |  |  |  |  |  |  |  |  | 90.1 |  |  |  | 95.8 |
(1) Diluted by assumed exercise of stock-based compensation awards using the treasury stock method.

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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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