NET EARNINGS PER SHARE - Potential Shares Not Included in the Computation of Diluted Earnings Per Share (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
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	2,102	4,551	2,102	4,551
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	354	453	354	453
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	24,987	24,865	24,987	24,865