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Earnings Per Share Attributable to Common Stockholders (Tables) | 3 Months Ended
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Mar. 31, 2025
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings Per Share |
|  | Three months ended March 31, |  |
|  | 2025 |  | 2024 |  |  |  |
Net income available to common stockholders |  | $ | 102.9 |  |  | $ | 97.1 |  |  |  |  |
Basic weighted average shares outstanding |  | 184,824,362 |  | 183,059,321 |  |  |  |
Weighted average effect of dilutive securities: |  |  |  |  |  |  |  |
Share units |  | 919,988 |  | 825,864 |  |  |  |
Stock options and employee share purchase plan |  | 608,624 |  | 695,869 |  |  |  |
Diluted weighted average shares outstanding |  | 186,352,974 |  | 184,581,054 |  |  |  |
Earnings per share available to common stockholders: |  |  |  |  |  |  |  |
Basic |  | $ | 0.56 |  |  | $ | 0.53 |  |  |  |  |
Diluted |  | $ | 0.55 |  |  | $ | 0.53 |  |  |  |  |

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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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