RESTRUCTURING AND DIVESTITURES - Summary of Divestiture Losses, Net of (Gains) Included in the Consolidated Statements of (Loss) Income (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
Restructuring Cost And Reserve [Line Items]
Total									$ 103.0	$ 12.8	$ 9.5
Divestiture losses, net of gains	$ 24.9	$ 83.2	$ 0.3	$ (5.4)	$ (0.2)	$ 1.6	$ 7.3	$ 4.1	103.0	12.8	9.5
North America RWCS
Restructuring Cost And Reserve [Line Items]
Total									6.5	6.9
International RWCS
Restructuring Cost And Reserve [Line Items]
Total									57.5	5.9	9.5
International RWCS | United Kingdom
Restructuring Cost And Reserve [Line Items]
Divestiture losses, net of gains									(5.1)
International RWCS | South Africa
Restructuring Cost And Reserve [Line Items]
Divestiture losses, net of gains											(3.0)
Mexico Operations | International RWCS
Restructuring Cost And Reserve [Line Items]
Non-cash impairment charges									43.2
Chile Operations | International RWCS
Restructuring Cost And Reserve [Line Items]
Non-cash impairment charges									19.0
Communication Related Services | North America RWCS
Restructuring Cost And Reserve [Line Items]
Non-cash impairment charges									6.5
Communication Related Services | All Other
Restructuring Cost And Reserve [Line Items]
Non-cash impairment charges									39.0
Clean Room Business | North America RWCS | United States
Restructuring Cost And Reserve [Line Items]
Non-cash impairment charges										6.9
Hazardous Waste Business | International RWCS | United Kingdom
Restructuring Cost And Reserve [Line Items]
Non-cash impairment charges									0.7	$ 5.9	6.8
Patient Transport Business | International RWCS | United Kingdom
Restructuring Cost And Reserve [Line Items]
Non-cash impairment charges									(0.3)		$ 5.7
Divestiture losses, net of gains									$ (0.3)