BUSINESS COMBINATIONS 2012 Acquisitions (Details) (USD $)														0 Months Ended		12 Months Ended						12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Oil Refining and Recycling	Dec. 31, 2012 Oil Refining and Recycling	Dec. 28, 2012 Oil Refining and Recycling	Dec. 31, 2013 Environmental Services	Dec. 31, 2012 Environmental Services	Dec. 28, 2012 Environmental Services	Dec. 31, 2013 Industrial and Field Services	Dec. 31, 2012 Industrial and Field Services	Dec. 28, 2012 Industrial and Field Services	Jul. 30, 2012 Senior secured notes	Dec. 28, 2012 Safety-Kleen	Dec. 03, 2012 Safety-Kleen	Dec. 31, 2012 Safety-Kleen	Dec. 31, 2011 Safety-Kleen	Dec. 31, 2013 Safety-Kleen	Dec. 28, 2012 Safety-Kleen Senior secured notes Unsecured Senior Notes 2021	Dec. 28, 2012 Safety-Kleen Preliminary Allocations	Dec. 28, 2012 Safety-Kleen Measurement Period Adjustments	Dec. 31, 2012 Other 2012 Acquisitions aquisition	Dec. 31, 2011 Other 2012 Acquisitions	Dec. 31, 2013 Other 2012 Acquisitions	Dec. 31, 2013 Other 2012 Acquisitions Preliminary Allocations	Dec. 31, 2013 Other 2012 Acquisitions Measurement Period Adjustments
Business Acquisition [Line Items]
Outstanding common shares acquired (as a percent)	100.00%													100.00%
Cash paid for Peak common shares														$ 305,000,000
Issuance of acquisition-related common stock, net														369,300,000	369,300,000
Stock Issued During Period, Shares, Acquisitions														6,900,000	6,900,000.0
Proceeds from Issuance of Private Placement														589,000,000
Long-term Debt, Gross																			600,000,000
Senior secured notes, interest rate (as a percent)													7.625%						5.125%
Business Acquisition, Cost of Acquired Entity, Transaction Costs																6,300,000		2,700,000
Summary of recognized assets acquired and liabilities assumed
Current assets																								20,387,000	20,270,000	117,000
Inventories and supplies														107,376,000						102,339,000	5,037,000
Other current assets														155,674,000						152,245,000	3,429,000
Property, plant and equipment														516,002,000						514,712,000	1,290,000			51,893,000	51,901,000	(8,000)
Permits and other intangibles														438,627,000						421,400,000	17,227,000			21,769,000	21,770,000	(1,000)
Other assets														4,338,000						4,985,000	(647,000)			57,000	53,000	4,000
Current liabilities														(206,241,000)						(192,652,000)	(13,589,000)			(5,299,000)	(5,277,000)	(22,000)
Closure and post-closure liabilities														(7,553,000)						(15,774,000)	8,221,000
Remedial liabilities, less current portion														(48,301,000)						(38,370,000)	(9,931,000)
Other long-term liabilities														(119,331,000)						(128,375,000)	9,044,000			(5,212,000)	(5,133,000)	(79,000)
Total identifiable net assets														840,591,000						820,510,000	20,081,000			83,595,000	83,584,000	11,000
Goodwill	570,960,000	579,715,000	122,392,000	171,161,000	173,158,000	173,200,000	172,308,000	174,089,000	174,100,000	144,385,000	146,715,000	75,400,000		422,693,000						436,749,000	(14,056,000)			25,264,000	23,956,000	1,308,000
Total														1,263,284,000						1,257,259,000	6,025,000	108,900,000		108,859,000	107,540,000	1,319,000
Business Combination, Acquired Receivables, Fair Value														137,600,000										13,200,000
Customer receivables, gross amount due														142,700,000										13,500,000
Business Acquisition, Pro Forma Information
Pro forma combined revenues																3,529,592,000	3,245,637,000					2,268,621,000	2,112,297,000
Pro forma combined net income																125,425,000	129,242,000					130,322,000	126,768,000
Number of Businesses Acquired																						3
Assumed debt																						7,700,000
Post-closing adjustments																						2,100,000
Acquisition related costs																						$ 400,000