RESTRUCTURING, DIVESTITURES, AND IMPAIRMENTS - Divestiture Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]
Loss on sale of business	$ 10.9	$ 104.1	$ 10.9	$ 166.2
North America
Restructuring Cost and Reserve [Line Items]
Loss on sale of business	0.0	(8.3)	0.0	53.8
North America | Domestic Environmental Solutions business
Restructuring Cost and Reserve [Line Items]
Loss on sale of business	0.0	(8.3)	0.0	53.8
International
Restructuring Cost and Reserve [Line Items]
Loss on sale of business	10.9	112.4	10.9	112.4
International | Japan operations
Restructuring Cost and Reserve [Line Items]
Loss on sale of business	10.9	0.0	10.9	0.0
International | Argentina operations
Restructuring Cost and Reserve [Line Items]
Loss on sale of business	$ 0.0	$ 112.4	$ 0.0	$ 112.4