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SHARE-BASED COMPENSATION (Outstanding Treasury RSUs) (Details) - Treasury RSUs
 12 Months Ended
Dec. 31, 2017
USD ($)
shares
Jan. 01, 2017
USD ($)
shares
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Number, outstanding, beginning of fiscal year (in shares) | shares 249,000 292,000
Granted (in shares) | shares   8,000
Granted for dividends declared (in shares) | shares 2,000 3,000
Settled through the issuance of common shares (in shares) | shares (149,000) (43,000)
Forfeited (in shares) | shares   (11,000)
Number, outstanding, end of fiscal year (in shares) | shares 102,000 249,000
Weighted average fair value per unit, outstanding, beginning of fiscal year (in dollars per share) | $ $ 20.70 $ 20.25
Granted for dividends declared (in dollars per share) | $ 29.04 30.08
Granted for dividends declared (in dollars per share) | $   29.08
Settled through the issuance of common shares (in dollars per share) | $ 14.12 17.78
Forfeited (in dollars per shares) | $   29.20
Weighted average fair value per unit, outstanding, end of fiscal year (in dollars per share) | $ $ 30.46 $ 20.70