INCOME TAXES (Reconciliation of the beginning and ending amount of gross unrecognized tax benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Jan. 02, 2016
Reconciliation of the beginning and ending amount of gross unrecognized tax benefits
Beginning balance	$ 1.3	$ 2.4	$ 4.4
Additions for tax positions of the current year	0.4	0.1	0.2
Additions for tax positions of prior years	0.2	0.1	0.2
Reductions for tax positions of prior years	0.0	(0.2)	(0.8)
Statute expirations	(0.6)	(1.1)	(1.6)
Settlements	0.0	0.0	0.0
Ending balance	$ 1.3	$ 1.3	$ 2.4