LEASES - Rejected Leases (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 28, 2020 USD ($)	Jun. 28, 2020 USD ($)
Reorganization Items
Rejected operating lease - ROU asset values	$ 25.0	$ 25.0
Rejected financing lease - ROU asset values	0.5	0.5
Rejected operating lease - net lease liability	32.9	32.9
Rejected financing lease - net lease liability	0.6	0.6
Estimated damages on rejected operating leases	2.7	3.5
Gains on write-off of net lease liabilities for rejected leases	6.4	7.9
Gain (loss) on financing lease termination	0.1	0.1
Rejected lease charge	0.5	0.5
Write-off of leasehold improvements and other costs	$ 1.1	$ 1.1