Basic earnings per share is computed by dividing net income by the weighted-average number of shares of common stock outstanding during the period. Diluted earnings per share is computed by dividing net income by the weighted-average number of shares of common stock outstanding during the period, increased to include the number of shares of common stock that would have been outstanding had potentially dilutive shares of common stock been issued. The dilutive effect of stock options, performance options, RSUs, performance shares and RSAs are reflected in diluted earnings per share by applying the treasury stock method.

A summary of the calculations of our basic and diluted earnings per share is as follows:



	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In millions, except per share data)	2023		2022		2023		2022
Net Income	$	70	$	33	$	91	$	35
Weighted-average common shares outstanding:		81.4		82.1		81.5		82.2
Effect of dilutive securities:
RSUs⁽¹⁾		0.3		—		0.3		—
Stock options⁽²⁾		—		0.1		—		0.2
Weighted-average common shares outstanding - assuming dilution:		81.8		82.2		81.8		82.4
Basic earnings per share	$	0.86	$	0.40	$	1.12	$	0.42
Diluted earnings per share	$	0.85	$	0.40	$	1.12	$	0.42

(1)RSUs of 74,736 shares and 1,009,556 shares for the three months ended June 30, 2023 and 2022, respectively, and 719,660 shares and 866,384 shares for the six months ended June 30, 2023 and 2022, respectively, were not included in the diluted earnings per share calculation because their effect would have been anti-dilutive.

(2)Stock options to purchase 1,489,773 shares and 1,630,293 shares for the three months ended June 30, 2023 and 2022, respectively, and 1,332,990 shares and 1,416,344 shares for the six months ended June 30, 2023 and 2022, respectively, were not included in the diluted earnings per share calculation because their effect would have been anti-dilutive. Performance options to purchase 785,119 shares and 89,836 shares for the three months ended June 30, 2023 and 2022, respectively, and 523,312 shares and 45,166 shares for the six months ended June 30, 2023 and 2022, respectively, were not included in the diluted earnings per share calculation because their effect would have been anti-dilutive.