LONG-TERM DEBT - Debt Refinancing (Details) - USD ($) $ in Millions		3 Months Ended	6 Months Ended	9 Months Ended
	Jul. 16, 2018	Sep. 24, 2017	Jul. 01, 2018	Sep. 24, 2017
LONG-TERM DEBT
Amount of debt redeemed		$ 16.9		$ 16.9
9.00% senior secured notes due in 2022
LONG-TERM DEBT
Amount of debt redeemed	$ 344.1	$ 1.7	$ 75.0	$ 1.7
9.00% senior secured notes due in 2026
LONG-TERM DEBT
Aggregate principal amount of notes issued	$ 310.0