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Earnings Per Share
 6 Months Ended
Jun. 30, 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:
Three Months Ended June 30,Six Months Ended June 30,
(in millions, except share and per share data)
2024202320242023
Net income
$188.6 $27.3 $240.1 $51.1 
    Add back interest expense, net of tax
2.5 — 4.9 — 
Net income, diluted
$191.1 $27.3 $245.0 $51.1 
Weighted average number of common shares outstanding, basic (in thousands)70,062 69,741 70,010 69,662 
Convertible Notes
3,528 — 3,528 — 
Stock options
140 318 157 356 
Restricted stock units
72 83 76 101 
Weighted average number of common shares outstanding, diluted (in thousands)
73,802 70,142 73,771 70,119 
Earnings per share
    Basic
$2.69 $0.39 $3.43 $0.73 
    Diluted
$2.59 $0.39 $3.32 $0.73 
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 June 30,Six Months Ended June 30,
 (in thousands)
2024202320242023
Convertible Notes
— 3,528 — 3,528 
Restricted stock units
471 231 457 235 
Stock options
286 157 249 156 
Total757 3,916 706 3,919