GOODWILL AND OTHER INTANGIBLE ASSETS (Acquired Intangibles) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Safety-Kleen [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Total Amount Assigned	$ 311,026
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	18 years
Total Amount Assigned	424,826
Other 2012 Acquisitions [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Total Amount Assigned	22,525
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years 4 months 24 days
Total Amount Assigned	22,525
Trademarks [Member] | Safety-Kleen [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Acquired Indefinite-lived Intangible Assets, Total Amount Assigned	113,800
Trademarks [Member] | Other 2012 Acquisitions [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Acquired Indefinite-lived Intangible Assets, Total Amount Assigned	0
Permits [Member] | Safety-Kleen [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Total Amount Assigned	37,300
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	29 years 4 months 17 days
Permits [Member] | Other 2012 Acquisitions [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Total Amount Assigned	4,100
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years 6 months
Customer Relationships [Member] | Safety-Kleen [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Total Amount Assigned	272,155
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	17 years 8 months 12 days
Customer Relationships [Member] | Other 2012 Acquisitions [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Total Amount Assigned	17,575
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years 8 months 12 days
Other Intangible Assets [Member] | Safety-Kleen [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Total Amount Assigned	1,571
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years 6 months
Other Intangible Assets [Member] | Other 2012 Acquisitions [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Total Amount Assigned	$ 850
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	4 years 9 months 18 days