NET EARNINGS PER SHARE AND SHARE REPURCHASES Dilutive Potential Common Shares (Details) - shares shares in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Basic	754,986	753,535	756,531	752,301
Dilutive potential common shares	2,403	3,368	2,585	3,757
Diluted	757,389	756,903	759,116	756,058
Stock options
Dilutive potential common shares	1,370	2,437	1,560	2,754
Restricted stock units
Dilutive potential common shares	629	551	570	529
Performance share units
Dilutive potential common shares	404	380	455	474

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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