ENVIRONMENTAL (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Environmental Remediation Obligations [Abstract]
Provisions charged to income	$ 5.6	$ 2.5
Recoveries for costs incurred and expensed	0.0	(2.2)
Environmental expense	5.6	0.3
Reserves for future environmental expenditures - total	149.5	147.2	$ 147.3
Reserves for future environmental expenditures - noncurrent	$ 124.5	$ 128.2	$ 122.3