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Earnings Per Share
 9 Months Ended
Sep. 30, 2025
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share
Basic earnings per share is computed by dividing net income by the weighted average number of common shares outstanding for the period. Diluted earnings per share is computed using the weighted average number of common shares outstanding and, when dilutive, common share equivalents. The computation of basic and diluted earnings per share was as follows:
Three Months Ended September 30,Nine Months Ended September 30,
(in millions, except share and per share data)
2025202420252024
Net income
$87.6 $77.5 $145.5 $317.6 
    Add back interest expense, net of tax
— 2.4 2.8 7.1 
Net income, diluted
$87.6 $79.9 $148.3 $324.7 
Weighted average number of common shares outstanding, basic (in thousands)70,367 70,123 70,343 70,047 
Restricted stock units
201 140 197 98 
Stock options
93 160 107 157 
Convertible Senior Notes
— 3,528 1,645 3,528 
Weighted average number of common shares outstanding, diluted (in thousands)
70,661 73,951 72,292 73,830 
Earnings per share:
    Basic
$1.24 $1.11 $2.07 $4.53 
    Diluted
$1.24 $1.08 $2.05 $4.40 
The number of common share equivalents excluded from the computation of diluted earnings per share because either the effect would have been anti-dilutive, or the performance criteria related to the units had not yet been met, were as follows:
Three Months Ended September 30,Nine Months Ended September 30,
 (in thousands)
2025202420252024
Restricted stock units
418 491 427 473 
Stock options
125 231 131 243 
Total543 722 558 716