GEOGRAPHIC AREA AND SERVICES INFORMATION - Summary of Revenues Details by Service Line (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Entity Wide Information Revenue From External Customer [Line Items]
Revenues	$ 799.9	$ 833.1	$ 845.8	$ 830.1	$ 852.7	$ 854.9	$ 883.3	$ 895.0	$ 3,308.9	$ 3,485.9	$ 3,580.7
Regulated Waste and Compliance Services
Entity Wide Information Revenue From External Customer [Line Items]
Revenues									1,892.8	1,932.6	2,023.6
Secure Information Destruction Services
Entity Wide Information Revenue From External Customer [Line Items]
Revenues									901.9	911.0	823.4
Communication And Related Services
Entity Wide Information Revenue From External Customer [Line Items]
Revenues									219.2	313.1	382.6
Manufacturing and Industrial Services
Entity Wide Information Revenue From External Customer [Line Items]
Revenues									$ 295.0	$ 329.2	$ 351.1