Earnings (Loss) per Share

12 Months Ended

Dec. 31, 2022

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 shares of common stock and potentially dilutive common stock outstanding for the period. The calculation of diluted net income per share excludes all anti-dilutive common shares.


	Years Ended December 31,
In millions (except share and per share data)	2022		2021		2020
Net income (loss)	$	211.6	$	118.1	$	181.4

Basic and Diluted earnings (loss) per share (1)
Basic earnings (loss) per share	$	5.54	$	2.97	$	4.39
Diluted earnings (loss) per share	$	5.50	$	2.95	$	4.37

Shares (2)
Weighted average number of shares of common stock outstanding - Basic	38,179		39,816		41,330
Weighted average additional shares assuming conversion of potential common shares	292		243		217
Shares - diluted basis	38,471		40,059		41,547

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(1) Diluted earnings (loss) per share is calculated using net income (loss) available to common stockholders divided by diluted weighted average shares of common shares outstanding during each period, which includes the dilutive effect of outstanding equity awards.

(2) Shares are presented in thousands.

The following average number of potential common shares were antidilutive and, therefore, were not included in the diluted earnings per share calculation:


	Years Ended December 31,
In thousands	2022	2021	2020
Average number of potential common shares - antidilutive	204	98	177