COMMITMENTS AND CONTINGENCIES (Details) CAD in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016 USD ($) site proceeding claim facility	Dec. 31, 2012 CAD	Dec. 31, 2002 a	Dec. 31, 1999 municipality	Dec. 31, 1968 permit	Dec. 31, 2015 USD ($) proceeding
Contingencies [Line Items]
Recorded reserves for actual or probable liabilities | $	$ 20,900,000					$ 21,900,000
Number of pending personal injury claims allegedly resulting from the used of Safety-Kleen's products | proceeding	60
Number of product liability claims settled or dismissed | claim	9
Legal and Administrative Proceedings
Contingencies [Line Items]
Recorded reserves for actual or probable liabilities | $	$ 18,700,000					18,900,000
Possible increase in legal and administrative proceedings | $	$ 1,800,000					1,900,000
Ville Mercier
Contingencies [Line Items]
Number of permits issued by government, for dumping organic liquid | permit					2
Number of neighboring municipalities filing separate legal proceedings against the Mercier Subsidiary and the Government of Quebec | municipality				3
General damages sought | CAD		CAD 2.9
Punitive damages sought | CAD		CAD 10.0
Superfund Proceedings
Contingencies [Line Items]
Number of sites owned by third party excluded from cleanup or related liabilities	129
Number of sites owned by the entity subject to proceedings under federal or state superfund laws | facility	2
Notices received from owners of third party sites seeking indemnification from the company	127
Number of sites for which environmental remediation expense is settled	32
Third party sites requiring expenditure on remediation	17
Number of sites not currently requiring expenditures on remediation	78
Number of sites which potential liability could exceed $100,000	13
Notices received from owners of third party sites seeking indemnification from the company	6
Superfund Proceedings | Minimum
Contingencies [Line Items]
Minimum potential liability | $	$ 100,000
Wichita Property
Contingencies [Line Items]
State-designated superfund site acquired, total acres | a			1,400
Certain Other Third Party Sites
Contingencies [Line Items]
Indemnification agreement with third party sites	11
Kleen Performance Products
Contingencies [Line Items]
Notices received from owners of third party sites seeking indemnification from the company	17
Federal and State Enforcement Actions
Contingencies [Line Items]
Recorded reserves for actual or probable liabilities | $	$ 2,200,000					$ 3,000,000
Number of pending personal injury claims allegedly resulting from the used of Safety-Kleen's products | proceeding	5					6
Federal and State Enforcement Actions | Minimum
Contingencies [Line Items]
Minimum potential liability | $	$ 100,000					$ 100,000