COMMITMENTS AND CONTINGENCIES - Purchases and Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Operating leases
Total rental expense, included in other operating expenses, from continuing operations	$ 11.6	$ 12.5	$ 11.2
Sublease income from operating leases	$ 4.6	$ 2.2	$ 3.9