NET EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2021

Diluted earnings per share is net earnings 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
SHARES IN THOUSANDS	MARCH 2021		MARCH 2020
Weighted average common shares outstanding – basic		748,718		746,534
Dilutive potential common shares:
Stock options		217		338
Restricted stock units		738		283
Performance share units		351		—
Total effect of outstanding dilutive potential common shares		1,306		621
Weighted average common shares outstanding – dilutive		750,024		747,155

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

The following shares were not included in the computation of diluted earnings 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
SHARES IN THOUSANDS	MARCH 2021		MARCH 2020
Stock options		147		2,292
Performance share units		1,115		1,390