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Earnings Per Share - Summary of Basic and Diluted Earnings Per Share and Antidilutive Securities Excluded From Computation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Numerator: |  |
Income from continuing operations | $ 140.1 | $ 170.9
Less: dividends declared | 45.3 | 41.5
Undistributed earnings | $ 94.8 | $ 129.4
Percent allocated to common stockholders | 99.80% | 99.80%
Undistributed earnings allocated to common stockholders | $ 94.6 | $ 129.1
Add: dividends declared to common shares, restricted stock units and vested and deferred restricted and performance shares | 45.2 | 41.4
Income from continuing operations attributable to common stockholders | $ 139.8 | $ 170.5
Shares: |  |
Basic weighted-average shares outstanding (in shares) | 44.3 | 47.8
Effect of dilutive securities: |  |
Performance awards (in shares) | 0.1 | 0.2
Stock options (in shares) | 0.3 | 0.4
Diluted weighted-average shares outstanding (in shares) | 44.7 | 48.4
Per share income from continuing operations attributable to common shares: |  |
Basic (in dollars per share) | $ 3.16 | $ 3.57
Diluted (in dollars per share) | $ 3.13 | $ 3.52
Basic weighted-average shares outstanding (in shares) | 44.3 | 47.8
Basic weighted-average shares outstanding and unvested restricted shares expected to vest (in shares) | 44.4 | 47.9
Percent allocated to common stockholders | 99.80% | 99.80%
Anti-dilutive stock options excluded from EPS calculation |  |
Income from discontinued operations attributable to common stockholders for basic earnings per share | $ 3.2 | $ 21.4
Income from discontinued operations attributable to common stockholder for diluted earnings per share | 3.2 | 21.4
Net income attributable to common stockholders for basic earnings per share | 143.0 | 191.9
Net income attributable to common stockholders for diluted earnings per share | $ 143.0 | $ 191.9
Anti-dilutive stock options excluded from earnings per share calculation (in shares) | 0.2 | 0.1

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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