PENSION PLANS AND OTHER BENEFITS (Weighted-Average Asset Allocations and Fair Value of Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocation	100.00%	100.00%
Fair value of pension plan assets [Abstract]
Total pension assets	$ 65.6	$ 60.7	$ 69.1
Level One
Fair value of pension plan assets [Abstract]
Total pension assets	1.9	1.9
Level Two
Fair value of pension plan assets [Abstract]
Total pension assets	63.7	46.9
Level Three
Fair value of pension plan assets [Abstract]
Total pension assets	$ 0.0	$ 11.9
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocation	3.00%	3.00%
Fair value of pension plan assets [Abstract]
Total pension assets	$ 1.9	$ 1.9
Cash and cash equivalents | Level One
Fair value of pension plan assets [Abstract]
Total pension assets	1.9	1.9
Cash and cash equivalents | Level Two
Fair value of pension plan assets [Abstract]
Total pension assets	0.0	0.0
Cash and cash equivalents | Level Three
Fair value of pension plan assets [Abstract]
Total pension assets	$ 0.0	$ 0.0
Blended funds
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocation	51.00%	32.00%
Fair value of pension plan assets [Abstract]
Total pension assets	$ 33.6	$ 19.6
Blended funds | Level One
Fair value of pension plan assets [Abstract]
Total pension assets	0.0	0.0
Blended funds | Level Two
Fair value of pension plan assets [Abstract]
Total pension assets	33.6	19.6
Blended funds | Level Three
Fair value of pension plan assets [Abstract]
Total pension assets	$ 0.0	$ 0.0
Bond funds
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocation	46.00%	45.00%
Insurance policy
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocation	0.00%	20.00%
Fair value of pension plan assets [Abstract]
Total pension assets		$ 11.9
Insurance policy | Level One
Fair value of pension plan assets [Abstract]
Total pension assets		0.0
Insurance policy | Level Two
Fair value of pension plan assets [Abstract]
Total pension assets		0.0
Insurance policy | Level Three
Fair value of pension plan assets [Abstract]
Total pension assets		11.9
Treasuries
Fair value of pension plan assets [Abstract]
Total pension assets	$ 30.1	27.3
Treasuries | Level One
Fair value of pension plan assets [Abstract]
Total pension assets	0.0	0.0
Treasuries | Level Two
Fair value of pension plan assets [Abstract]
Total pension assets	30.1	27.3
Treasuries | Level Three
Fair value of pension plan assets [Abstract]
Total pension assets	$ 0.0	$ 0.0