XML 86 R76.htm IDEA: XBRL DOCUMENT
v3.8.0.1

SEGMENT REPORTING (Third Party Revenues to Direct Revenues) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Segment Reporting Information [Line Items] |  |
Total revenues | $ 749,778 | $ 688,941
Intersegment revenues, net |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 0 | 0
Corporate Items, net |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 0 | 0
Direct revenues |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 749,778 | 688,941
Environmental Services |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 439,688 | 395,907
Environmental Services | Intersegment revenues, net |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 31,965 | 32,069
Environmental Services | Corporate Items, net |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 794 | 920
Environmental Services | Direct revenues |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 472,447 | 428,896
Safety-Kleen |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 309,918 | 292,901
Safety-Kleen | Intersegment revenues, net |  |
Segment Reporting Information [Line Items] |  |
Total revenues | (31,965) | (32,069)
Safety-Kleen | Corporate Items, net |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 11 | 3
Safety-Kleen | Direct revenues |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 277,964 | 260,835
Corporate Items |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 172 | 133
Corporate Items | Intersegment revenues, net |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 0 | 0
Corporate Items | Corporate Items, net |  |
Segment Reporting Information [Line Items] |  |
Total revenues | (805) | (923)
Corporate Items | Direct revenues |  |
Segment Reporting Information [Line Items] |  |
Total revenues | $ (633) | $ (790)

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_IntersegmentEliminationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=clh_CorporateAndReconcilingItemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=clh_EnvironmentalServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=clh_SafetyKleenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_CorporateAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |