GOODWILL AND OTHER INTANGIBLE ASSETS - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Intangible Assets By Major Class [Line Items]
Impairments during the year	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 207.4	$ 0.0	$ 0.0	$ 20.9		$ 0.0	$ 228.3	$ 358.7
Intangible amortization										$ 124.9	145.2	$ 130.3
Domestic Environmental Solutions
Intangible Assets By Major Class [Line Items]
Impairments during the year											80.8
Canada
Intangible Assets By Major Class [Line Items]
Impairments during the year											126.6
Latin America
Intangible Assets By Major Class [Line Items]
Impairments during the year									$ 72.4		$ 20.9
Domestic CRS
Intangible Assets By Major Class [Line Items]
Impairments during the year									$ 286.3