ACQUISITIONS - Summary of Acquisitions Location, Services and Type (Detail) - Entity	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Number of acquisitions	30	31	43
Number of acquisitions of selected assets and liabilities	27	28	31
Number of acquisitions of stock	3	3	12
Regulated Waste
Business Acquisition [Line Items]
Number of acquisitions	7	11	35
Secure Information Destruction
Business Acquisition [Line Items]
Number of acquisitions	22	19	5
Communication Services
Business Acquisition [Line Items]
Number of acquisitions	1	1	3
United States
Business Acquisition [Line Items]
Number of acquisitions	21	21	19
Number of acquisitions of selected assets and liabilities	21	19	16
Number of acquisitions of stock		2	3
United States | Regulated Waste
Business Acquisition [Line Items]
Number of acquisitions	2	5	13
United States | Secure Information Destruction
Business Acquisition [Line Items]
Number of acquisitions	18	15	4
United States | Communication Services
Business Acquisition [Line Items]
Number of acquisitions	1	1	2
Canada
Business Acquisition [Line Items]
Number of acquisitions	1		2
Number of acquisitions of stock	1		2
Canada | Secure Information Destruction
Business Acquisition [Line Items]
Number of acquisitions	1		1
Canada | Communication Services
Business Acquisition [Line Items]
Number of acquisitions			1
France
Business Acquisition [Line Items]
Number of acquisitions	1
Number of acquisitions of selected assets and liabilities	1
France | Secure Information Destruction
Business Acquisition [Line Items]
Number of acquisitions	1
Netherlands
Business Acquisition [Line Items]
Number of acquisitions	2		2
Number of acquisitions of selected assets and liabilities	2		1
Number of acquisitions of stock			1
Netherlands | Regulated Waste
Business Acquisition [Line Items]
Number of acquisitions	1		2
Netherlands | Secure Information Destruction
Business Acquisition [Line Items]
Number of acquisitions	1
Portugal
Business Acquisition [Line Items]
Number of acquisitions	1
Number of acquisitions of stock	1
Portugal | Regulated Waste
Business Acquisition [Line Items]
Number of acquisitions	1
Republic of Korea
Business Acquisition [Line Items]
Number of acquisitions	2	1	6
Number of acquisitions of selected assets and liabilities	2	1	6
Republic of Korea | Regulated Waste
Business Acquisition [Line Items]
Number of acquisitions	2	1	6
Spain
Business Acquisition [Line Items]
Number of acquisitions	2	3	4
Number of acquisitions of selected assets and liabilities	1	2	4
Number of acquisitions of stock	1	1
Spain | Regulated Waste
Business Acquisition [Line Items]
Number of acquisitions	1	2	4
Spain | Secure Information Destruction
Business Acquisition [Line Items]
Number of acquisitions	1	1
Australia
Business Acquisition [Line Items]
Number of acquisitions		3
Number of acquisitions of selected assets and liabilities		3
Australia | Secure Information Destruction
Business Acquisition [Line Items]
Number of acquisitions		3
Romania
Business Acquisition [Line Items]
Number of acquisitions		2	4
Number of acquisitions of selected assets and liabilities		2	3
Number of acquisitions of stock			1
Romania | Regulated Waste
Business Acquisition [Line Items]
Number of acquisitions		2	4
United Kingdom
Business Acquisition [Line Items]
Number of acquisitions		1
Number of acquisitions of selected assets and liabilities		1
United Kingdom | Regulated Waste
Business Acquisition [Line Items]
Number of acquisitions		1
Brazil
Business Acquisition [Line Items]
Number of acquisitions			2
Number of acquisitions of stock			2
Brazil | Regulated Waste
Business Acquisition [Line Items]
Number of acquisitions			2
Ireland
Business Acquisition [Line Items]
Number of acquisitions			1
Number of acquisitions of stock			1
Ireland | Regulated Waste
Business Acquisition [Line Items]
Number of acquisitions			1
Mexico
Business Acquisition [Line Items]
Number of acquisitions			3
Number of acquisitions of selected assets and liabilities			1
Number of acquisitions of stock			2
Mexico | Regulated Waste
Business Acquisition [Line Items]
Number of acquisitions			3