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Earnings (Loss) per Share
3 Months Ended
Mar. 31, 2023
Earnings Per Share [Abstract]  
Earnings (Loss) per Share Earnings (Loss) per Share
Basic earnings (loss) per share is computed by dividing net income (loss) for the period by the weighted average number of common shares outstanding during the period. Diluted earnings (loss) per share is computed by dividing net income (loss) for the period by the weighted average number of common shares and potentially dilutive common shares outstanding for the period. The calculation of diluted net income per share excludes all antidilutive common shares.
Three Months Ended March 31,
In millions, except share and per share data20232022
Net income (loss) $50.7 $60.8 
Basic and Diluted earnings (loss) per share
Basic earnings (loss) per share $1.36 $1.56 
Diluted earnings (loss) per share 1.35 1.55 
Shares (in thousands)
Weighted average number of common shares outstanding - Basic37,169 39,010 
Weighted average additional shares assuming conversion of potential common shares377 254 
Shares - diluted basis37,546 39,264 
The following average number of potential common shares were antidilutive, and therefore, were not included in the diluted earnings per share calculation:
Three Months Ended March 31,
In thousands20232022
Average number of potential common shares - antidilutive182 255