INCENTIVE COMPENSATION (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Accrued in costs related to the STIP	$ 28.9
Reserved common stock for future issuance under the LTIP (in shares)	5,000,000.0
Total fair value of the shares vested	$ 0.0	$ 22.4	$ 3.2
Total unrecognized compensation cost related to all nonvested awards	$ 8.6
Weighted average period unrecognized compensation cost is expected to be recognized	2 years 5 months 27 days