PENSION PLANS AND OTHER BENEFITS - Summary of Changes in Benefit Obligation and Plan Assets (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2022	Dec. 31, 2020
Pension Plan
Change in benefit obligation:
Benefit obligation at beginning of period	$ 73.3	$ 65.7
Interest cost	0.6	1.2	$ 1.2
Actuarial loss	(4.6)	(18.9)
Benefits paid	(2.8)	(2.7)
Currency fluctuation adjustment	(0.8)	(8.6)
Benefit obligation at end of period	65.7	36.7	73.3
Change in plan assets:
Beginning balance	72.1	69.4
Actual return	1.0	(14.8)
Company contributions	0.0	0.4
Currency fluctuation adjustment	(0.9)	(9.6)
Benefits paid	(2.8)	(2.7)
Ending balance	69.4	42.7	72.1
Overfunded status of the plan	3.7	6.0
Other Postretirement Benefits Plan
Change in benefit obligation:
Benefit obligation at beginning of period	10.6	11.3
Service cost	0.4	0.3
Interest cost	0.6	0.3
Actuarial loss	0.0	(2.0)
Benefits paid	(0.4)	(0.2)
Currency fluctuation adjustment	0.1	(0.8)
Benefit obligation at end of period	$ 11.3	$ 8.9	$ 10.6