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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2024
Earnings Per Share [Abstract]  
Summary of Basic and Diluted Earnings Per Share
Income from continuing operations and share data used in the basic and diluted earnings per share computations using the two-class method follows:
(in millions, except per share amounts and percentages)202420232022
Income from continuing operations$865.1 $718.9 $858.0 
Less: dividends declared
172.7 160.5 134.6 
Undistributed earnings692.4 558.4 723.4 
Percent allocated to common stockholders(1)
99.8 %99.8 %99.8 %
Undistributed earnings allocated to common stockholders691.1 557.1 721.8 
Add: dividends declared to common shares, restricted share units and vested and deferred restricted and performance shares
172.3 160.2 134.3 
Income from continuing operations attributable to common stockholders
$863.4 $717.3 $856.1 
Shares:   
Basic weighted-average shares outstanding 46.5 49.9 51.8 
Effect of dilutive securities:
Performance awards0.2 0.1 0.2 
Stock options0.4 0.4 0.5 
Diluted weighted-average shares outstanding
47.1 50.4 52.5 
Per share income from continuing operations attributable to common shares:
   
Basic$18.58 $14.38 $16.53 
Diluted$18.34 $14.22 $16.30 
(1)
Basic weighted-average shares outstanding
46.5 49.9 51.8 
Basic weighted-average shares outstanding and unvested restricted shares expected to vest
46.6 50.0 51.9 
Percent allocated to common stockholders99.8 %99.8 %99.8 %
Summary of Antidilutive Securities Excluded from Computation of Earnings Per Share
To calculate earnings per share for income from discontinued operations and for net income, the denominator for both basic and diluted earnings per share is the same as used in the above table.
(in millions)202420232022
Income from discontinued operations attributable to common stockholders for basic and dilutive earnings per share
$445.8 $48.5 $65.8 
Net income attributable to common stockholders for basic and diluted earnings per share
$1,309.3 $765.6 $921.8 
Anti-dilutive stock options excluded from earnings per share calculation (1)
— 0.6 0.2 
(1)Represents stock options excluded from the calculation of diluted earnings per share as such options’ assumed proceeds upon exercise would result in the repurchase of more shares than the underlying award.