NET EARNINGS PER SHARE - Potential Shares Not Included in the Computation of Diluted Earnings Per Share (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential Shares Not Included in the Computation of Diluted Earnings Per Share	5,016	0	4,618
Performance share units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential Shares Not Included in the Computation of Diluted Earnings Per Share	155	0	0
Preference Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential Shares Not Included in the Computation of Diluted Earnings Per Share	25,307	24,988	24,865