BUSINESS COMBINATIONS (Safety-Kleen) (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended			12 Months Ended
	Mar. 31, 2013		Mar. 31, 2012	Dec. 31, 2012	Dec. 28, 2012
Business Acquisition [Line Items]
Outstanding common shares acquired (as a percent)					100.00%
Safety-Kleen [Member]
Business Acquisition [Line Items]
Outstanding common shares acquired (as a percent)					100.00%
Combined purchase price					$ 1,300,000,000
Net working capital adjustment included in purchase price					7,300,000
Net working capital adjustment threshhold					50,000,000
Acquisition-related costs	1,200,000
Existing cash used to finance the acquisition				300,000,000	1,250,000,000
Net proceeds from a public offering of shares used to finance the acquisition				369,300,000
Number of shares sold in the public offering	6.9			6.9
Net proceeds from a private debt offering used to finance the acquisition				589,000,000
Business Acquisition, Purchase Price Allocation [Abstract]
Inventories and supplies					108,876,000
Other current assets					154,485,000	[1]
Property, plant and equipment					515,491,000
Permits and other intangibles					425,977,000
Other assets					3,838,000
Current liabilities					(195,562,000)
Remedial liabilities, less current portion					(49,020,000)
Closure and post-closure liabilities, less current portion					(5,573,000)
Deferred taxes, unrecognized tax benefits and other long-term liabilities					(119,855,000)
Total identifiable net assets					838,657,000
Goodwill					418,602,000	[2]
Total					1,257,259,000
Inventories and supplies, Measurement Period Adjustment	6,537,000
Other current assets, Measurement Period Adjustment	2,240,000	[1]
Property, plant and equipment, Measurement Period Adjustment	779,000
Permits and other intangibles, Measurement Period Adjustment	4,577,000
Other assets, Measurement Period Adjustment	(1,147,000)
Current liabilities, Measurement Period Adjustment	(2,910,000)
Closure and post-closure liabilities, less current portion, Measurement Period Adjustments	10,201,000
Remedial liabilities, less current portion, Measurement Period Adjustments	(10,650,000)
Deferred taxes, unrecognized tax benefits and other long-term liabilities, Measurement Period Adjustments	8,520,000
Total identiiable net assets, Measurement Period Adjustments	18,147,000
Goodwill, Measurement Period Adjustments	(18,147,000)	[2]
Total, Measurement Period Adjustments	0
Preliminary fair value of customer receivables					132,300,000
Gross amounts of customer receivables					142,200,000
Business Acquisition, Pro Forma Information [Abstract]
Pro forma combined revenues			883,384,000
Pro forma combined net income			31,191,000
Unsecured Senior Notes 2021 [Member] | Senior Notes [Member] | Safety-Kleen [Member]
Business Acquisition [Line Items]
Face amount of long-term debt issued in private offering	600,000,000			600,000,000
Stated interest rate	5.125%			5.125%
Technical Services [Member] | Safety-Kleen [Member]
Business Acquisition, Purchase Price Allocation [Abstract]
Goodwill					2,100,000
Oil Re-Refining and Recycling [Member] | Safety-Kleen [Member]
Business Acquisition, Purchase Price Allocation [Abstract]
Goodwill					206,700,000
S K Environmental Services [Member] | Safety-Kleen [Member]
Business Acquisition, Purchase Price Allocation [Abstract]
Goodwill					142,300,000
Industrial and Field Services [Member] | Safety-Kleen [Member]
Business Acquisition, Purchase Price Allocation [Abstract]
Goodwill					67,500,000
Scenario, Previously Reported [Member] | Safety-Kleen [Member]
Business Acquisition, Purchase Price Allocation [Abstract]
Inventories and supplies					102,339,000
Other current assets					152,245,000	[1]
Property, plant and equipment					514,712,000
Permits and other intangibles					421,400,000
Other assets					4,985,000
Current liabilities					(192,652,000)
Remedial liabilities, less current portion					(38,370,000)
Closure and post-closure liabilities, less current portion					(15,774,000)
Deferred taxes, unrecognized tax benefits and other long-term liabilities					(128,375,000)
Total identifiable net assets					820,510,000
Goodwill					436,749,000	[2]
Total					$ 1,257,259,000

[1] The fair value of the assets acquired includes customer receivables with a preliminary aggregate fair value of $132.3 million. Combined gross amounts due were $142.2 million.

[2] Goodwill represents the excess of the fair value of the net assets acquired over the purchase price. Goodwill of $206.7 million, $142.3 million, $67.5 million, and $2.1 million has been recorded in the Oil Re-refining and Recycling, SK Environmental Services, Industrial and Field Services and Technical Services segments, respectively. None of the goodwill related to this acquisition will be deductible for tax purposes.