REVENUES FROM CONTRACTS WITH CUSTOMERS - Schedule of Revenues Disaggregated by Service, Primary Geographical Regions and Timing of Revenue Recognition (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 2,704.7	$ 2,646.9	$ 2,675.5
Regulated Waste and Compliance Services
Disaggregation of Revenue [Line Items]
Revenues	1,798.2	1,854.0	1,930.2
Secure Information Destruction Services
Disaggregation of Revenue [Line Items]
Revenues	906.5	792.9	745.3
North America
Disaggregation of Revenue [Line Items]
Revenues	2,263.1	2,136.5	2,189.2
North America | Regulated Waste and Compliance Services
Disaggregation of Revenue [Line Items]
Revenues	1,468.8	1,457.5	1,541.9
North America | Secure Information Destruction Services
Disaggregation of Revenue [Line Items]
Revenues	794.3	679.0	647.3
International
Disaggregation of Revenue [Line Items]
Revenues	441.6	510.4	486.3
International | Regulated Waste and Compliance Services
Disaggregation of Revenue [Line Items]
Revenues	329.4	396.5	388.3
International | Secure Information Destruction Services
Disaggregation of Revenue [Line Items]
Revenues	$ 112.2	$ 113.9	$ 98.0