NET EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2017

Dilutive Potential Common Shares

Diluted earnings per share is net earnings available to common shareholders 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 2017	MARCH 2016
Weighted average number of outstanding common shares – basic	750,665	632,004
Dilutive potential common shares:
Stock options	2,981	2,060
Restricted stock units	547	409
Performance share units	554	399
Total effect of outstanding dilutive potential common shares	4,082	2,868
Weighted average number of outstanding common shares – dilutive	754,747	634,872

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

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 2017	MARCH 2016
Stock options	1,432	6,215
Performance share units	568	534
Preference shares	—	25,307