NET EARNINGS (LOSS) PER SHARE AND SHARE REPURCHASES (Tables)

6 Months Ended

Jun. 30, 2020

Diluted earnings (loss) per share is net earnings (loss) divided by the sum of the weighted average number of our outstanding common shares and the effect of our outstanding dilutive potential common shares.

	QUARTER ENDED				YEAR-TO-DATE ENDED
SHARES IN THOUSANDS	JUNE 2020		JUNE 2019		JUNE 2020		JUNE 2019
Weighted average common shares outstanding – basic		746,896		745,486		746,715		746,041
Dilutive potential common shares:
Stock options		—		354		169		—
Restricted stock units		38		334		161		—
Performance share units		50		58		25		—
Total effect of outstanding dilutive potential common shares		88		746		355		—
Weighted average common shares outstanding – dilutive		746,984		746,232		747,070		746,041

Potential Shares Not Included in the Computation of Diluted Earnings (Loss) per Share

The following shares were not included in the computation of diluted earnings (loss) per share because they were either antidilutive or the required performance or market conditions were not met. Some or all of these shares may be dilutive potential common shares in future periods.

	QUARTER ENDED				YEAR-TO-DATE ENDED
SHARES IN THOUSANDS	JUNE 2020		JUNE 2019		JUNE 2020		JUNE 2019
Stock options		4,676		2,490		4,676		2,848
Restricted stock units		—		—		—		359
Performance share units		1,139		999		1,139		1,074