PENSION PLANS AND OTHER BENEFITS (Summary of Changes in Benefit Obligation and Plan Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Change in benefit obligation:
Benefit obligation as of January 1	$ 58.6	$ 67.0
Interest cost	1.7	1.6	$ 1.8
Actuarial loss (gain)	4.8	(3.7)
Plan amendment	0.0	0.3
Benefits paid	(3.5)	(2.9)
Currency fluctuation adjustment	2.5	(3.7)
Benefit obligation as of December 31	64.1	58.6	67.0
Change in plan assets:
Beginning balance	60.7	69.1
Actual return (loss)	4.2	(2.3)
Company contributions	1.7	0.7
Currency fluctuation adjustment	2.5	(3.9)
Benefits paid	(3.5)	(2.9)
Ending balance	65.6	60.7	$ 69.1
Overfunded status of the plan	$ 1.5	$ 2.1