SEGMENT REPORTING - Summary of Revenues Details by Service Line (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Entity Wide Information Revenue From External Customer [Line Items]
Revenues	$ 895.0	$ 892.4
Regulated Waste And Compliance Services
Entity Wide Information Revenue From External Customer [Line Items]
Revenues	497.4	511.2
Secure Information Destruction
Entity Wide Information Revenue From External Customer [Line Items]
Revenues	219.9	204.1
Communication And Related Services
Entity Wide Information Revenue From External Customer [Line Items]
Revenues	91.9	93.5
Manufacturing and Industrial Services
Entity Wide Information Revenue From External Customer [Line Items]
Revenues	$ 85.8	$ 83.6