NET EARNINGS PER SHARE (Tables)

6 Months Ended

Jun. 30, 2017

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		YEAR-TO-DATE ENDED
SHARES IN THOUSANDS	JUNE 2017	JUNE 2016	JUNE 2017	JUNE 2016
Weighted average number of outstanding common shares – basic	752,630	743,140	751,674	687,572
Dilutive potential common shares:
Stock options	2,845	3,061	2,913	2,398
Restricted stock units	488	1,075	518	678
Performance share units	488	425	520	412
Total effect of outstanding dilutive potential common shares	3,821	4,561	3,951	3,488
Weighted average number of outstanding common shares – dilutive	756,451	747,701	755,625	691,060

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		YEAR-TO-DATE ENDED
SHARES IN THOUSANDS	JUNE 2017	JUNE 2016	JUNE 2017	JUNE 2016
Stock options	1,408	1,916	1,408	1,916
Performance share units	450	471	450	471
Preference shares	—	25,273	—	25,273