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CAPITAL STOCK (Details) - shares
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Preferred Stock, Shares Outstanding 0 0  
Stock Issued During Period, Shares, Stock Exchange 2,101 1,905  
Treasury Stock, Shares (in shares) 47,630,511 42,227,178  
Exercise of stock options, net of 1,905, and 5,134 shares swapped in stock-for-stock exchange, respectively (587,441) (479,452) (805,235)
Stock Issued During Period, Shares, Restricted Stock Award, Retained 73,496 104,552  
Stock Issued During Period, Shares, Performance Share Units, Retained 9,971 33,003  
Common Stock [Member]      
Common Stock, Shares, Outstanding 62,028,708 67,432,041 68,853,938
Exercise of stock options, net of 1,905, and 5,134 shares swapped in stock-for-stock exchange, respectively 580,947 477,547  
Settlement of restricted stock units, net of 104,552 and 135,341 shares retained, respectively 145,757 175,549  
Settlement of performance share units, net of 33,003 and 39,874 shares retained, respectively 15,956 51,337  
Purchase of treasury shares (6,145,993) (2,126,330)  
Treasury Stock [Member]      
Treasury Stock, Shares (in shares) 47,630,511 42,227,178 40,805,281
Exercise of stock options, net of 1,905, and 5,134 shares swapped in stock-for-stock exchange, respectively (580,947) (477,547)  
Settlement of restricted stock units, net of 104,552 and 135,341 shares retained, respectively (145,757) (175,549)  
Settlement of performance share units, net of 33,003 and 39,874 shares retained, respectively (15,956) (51,337)  
Purchase of treasury shares 6,145,993 2,126,330