SIGNIFICANT ACCOUNTING POLICIES - ACCRUED AND OTHER LIABILITIES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Intangible assets
Impairment charges related to finite-lived intangible assets	$ 0.0	$ 0.0	$ 0.0
Impairment charges related to indefinite-lived intangible assets and goodwill for impairment	0.0	0.0	$ 0.0
Accrued and other liabilities
Payroll and vacation	34.7	35.8
Employee incentives and other benefits	33.2	32.2
Insurance reserves and other related liabilities - short term	15.6	9.0
Multi-employer withdrawal liability - short-term (see Note 12)	4.1	4.1
Income tax and other tax related liabilities	2.2	3.1
Other short-term liabilities	15.7	17.2
Total	105.5	101.4
Other long-term liabilities
Multi-employer withdrawal liability (see Note 12)	48.6	50.8
Pension and post-retirement liabilities (see Note 11)	17.8	43.3
Insurance reserves and other related liabilities	29.8	26.9
Other long-term liabilities	18.6	10.0
Total	$ 114.8	$ 131.0
Customer Relationships | Maximum
Intangible assets
Expected useful lives	21 years