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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

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