GEOGRAPHIC AREA AND SERVICES INFORMATION - Summary of Revenues Details by Service Line (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Entity Wide Information Revenue From External Customer [Line Items]
Revenues	$ 887.8	$ 882.8	$ 917.7	$ 892.4	$ 906.4	$ 890.1	$ 891.6	$ 874.2	$ 3,580.7	$ 3,562.3	$ 2,985.9
Regulated Waste And Compliance Services
Entity Wide Information Revenue From External Customer [Line Items]
Revenues									2,023.6	2,063.0	2,064.9
Secure Information Destruction Services
Entity Wide Information Revenue From External Customer [Line Items]
Revenues									823.4	747.5	178.1
Communication And Related Services
Entity Wide Information Revenue From External Customer [Line Items]
Revenues									382.6	370.4	334.1
Manufacturing And Industrial Services
Entity Wide Information Revenue From External Customer [Line Items]
Revenues									$ 351.1	$ 381.4	$ 408.8