RESTRUCTURING CHARGES - Summary of Liabilities Associated with Restructuring and Employee Severance (Details) - USD ($) $ in Millions		12 Months Ended
		Jan. 03, 2020	Dec. 28, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning balance		$ 6.9	$ 0.0
Restructuring charge			10.1
Payments and other		(5.0)	(3.2)
Restructuring Reserve, Ending balance		1.9	6.9
Q2 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning balance	[1]	1.9
Restructuring Reserve, Ending balance	[1]		1.9
Q2 2018 Restructuring Plan [Member] | Employee Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning balance	[1]	6.7	0.0
Restructuring charge	[1]		9.6
Payments and other	[1]	(4.9)	(2.9)
Restructuring Reserve, Ending balance	[1]	1.8	6.7
Q2 2018 Restructuring Plan [Member] | Facility Exit and Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning balance	[2]	0.2	0.0
Restructuring charge	[2]		0.5
Payments and other	[2]	(0.1)	(0.3)
Restructuring Reserve, Ending balance	[2]	$ 0.1	$ 0.2

[1] Employee-related costs primarily consist of severance benefits provided to employees who have been involuntarily terminated.

[2] Facility exit and other costs primarily consist of lease termination costs.