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Earnings Per Share
 12 Months Ended
Dec. 31, 2024
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:
Years Ended December 31,
(in millions, except share and per share data)202420232022
Net income$418.3 $206.3 $4.6 
Add back interest expense, net of tax attributable to assumed conversion of convertible senior notes
9.1 10.4 — 
Net income, diluted$427.4 $216.7 $4.6 
Weighted average number of common shares outstanding, basic
(in thousands)
70,076 69,751 69,375 
Convertible Senior Notes
3,528 3,528 — 
Stock options150 286 454 
Restricted stock units136 68 81 
Weighted average number of common shares outstanding, diluted
(in thousands)
73,890 73,633 69,910 
Earnings per share
    Basic
$5.97 $2.96 $0.07 
    Diluted
$5.78 $2.94 $0.07 
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:
Years Ended December 31,
(in thousands)202420232022
Restricted stock units464 322 227 
Stock options209 163 137 
Convertible Senior Notes
— — 3,528 
Total673 485 3,892