XML 79 R70.htm IDEA: XBRL DOCUMENT
v3.22.2

COMMITMENTS AND CONTINGENCIES (Details) $ in Millions | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 USD ($) site proceeding claim | Dec. 31, 2012 CAD ($) | Dec. 31, 1999 municipality | Dec. 31, 1968 permit | Dec. 31, 2021 USD ($) proceeding
Loss Contingencies [Line Items] |  |  |  |  |
Recorded reserves for actual or probable liabilities | $ | $ 36,800,000 |  |  |  | $ 36,100,000
Number of proceedings as defendant | proceeding | 60 |  |  |  |
Number of product liability claims settled or dismissed | claim | 8 |  |  |  |
Legal and Administrative Proceedings |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Recorded reserves for actual or probable liabilities | $ | $ 24,100,000 |  |  |  | 24,100,000
Ville Mercier |  |  |  |  |
Loss 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 | $ |  | $ 2.9 |  |  |
Punitive damages sought | $ |  | $ 10.0 |  |  |
Superfund Proceedings |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Number of sites owned by third party excluded from cleanup or related liabilities | site | 131 |  |  |  |
Number of sites owned by the entity subject to proceedings under federal or state superfund laws | site | 6 |  |  |  |
Number of sites owned by third parties | site | 125 |  |  |  |
Number of sites for which environmental remediation expense is settled | site | 30 |  |  |  |
Third party sites requiring expenditure on remediation | site | 15 |  |  |  |
Number of sites not currently requiring expenditures on remediation | site | 80 |  |  |  |
Minimum potential liability | $ | $ 1,000,000 |  |  |  |
Number of sites, potential liability exceeds substantial quota | site | 3 |  |  |  |
Number of sites with indemnifying parties paying all costs | site | 17 |  |  |  |
BR Facility | Remedial Liabilities for Inactive Sites |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Increase of remedial liabilities | $ | $ 3,300,000 |  |  |  |
Federal and State Enforcement Actions |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Recorded reserves for actual or probable liabilities | $ | $ 12,700,000 |  |  |  | $ 12,000,000
Number of proceedings as defendant | proceeding | 2 |  |  |  | 2
Minimum potential liability | $ | $ 1,000,000 |  |  |  | $ 1,000,000

X
- Definition Loss Contingency, General Damages Sought, Value + References No definition available. + Details
Name: | clh_LossContingencyGeneralDamagesSoughtValue
Namespace Prefix: | clh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Loss Contingency, Punitive Damages Sought, Value + References No definition available. + Details
Name: | clh_LossContingencyPunitiveDamagesSoughtValue
Namespace Prefix: | clh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Loss Contingency, Range Of Possible Loss, Minimum + References No definition available. + Details
Name: | clh_LossContingencyRangeOfPossibleLossMinimum
Namespace Prefix: | clh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This element represents the number of municipalities other than Ville Mercier that filed legal proceedings against the Mercier Subsidiary. + References No definition available. + Details
Name: | clh_NumberOfNeighboringMunicipalitiesFilingSeparateLegalProceedings
Namespace Prefix: | clh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of permits that are granted by the government in relation to environmental liabilities. + References No definition available. + Details
Name: | clh_NumberOfPermitsIssuedByGovernmentToDumpOrganicLiquid
Namespace Prefix: | clh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Sites, Potential Liability Exceeds Substantial Quota + References No definition available. + Details
Name: | clh_NumberOfSitesPotentialLiabilityExceedsSubstantialQuota
Namespace Prefix: | clh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of sites for which environmental remediation expense is incurred subject to proceedings under federal or state superfund laws owned by third party. + References No definition available. + Details
Name: | clh_SiteContingencyEnvironmentalRemediationExpenseNumberOfSitesOwnedByThirdParty
Namespace Prefix: | clh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of sites owned by the third party for which environmental remediation expense is settled. + References No definition available. + Details
Name: | clh_SiteContingencyEnvironmentalRemediationExpenseSettledNumberOfSitesOwnedByThirdParty
Namespace Prefix: | clh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of sites owned by the third party for which environmental remediation expense is not required. + References No definition available. + Details
Name: | clh_SiteContingencyNotRequiringEnvironmentalRemediationExpenseNumberOfSitesOwnedByThirdParty
Namespace Prefix: | clh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of sites that are subject to proceedings under federal or state superfund laws brought against the company or against third parties for which the company may have certain indemnification obligations. + References No definition available. + Details
Name: | clh_SiteContingencyNumberOfSites
Namespace Prefix: | clh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of sites that are subject to proceedings under federal or state superfund laws that are owned by the entity. + References No definition available. + Details
Name: | clh_SiteContingencyNumberOfSitesOwnedByEntity
Namespace Prefix: | clh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of sites owned by third parties subject to proceedings under federal or state Superfund laws for which the company or the prior owners shipped wastes. + References No definition available. + Details
Name: | clh_SiteContingencyNumberOfSitesOwnedByThirdParty
Namespace Prefix: | clh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Site Contingency, Number Of Sites With Indemnifying Parties Paying All costs + References No definition available. + Details
Name: | clh_SiteContingencyNumberOfSitesWithIndemnifyingPartiesPayingAllCosts
Namespace Prefix: | clh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Increase (decrease) in the accrual for environmental loss contingencies during the reporting period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q1) -URI https://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 + Details
Name: | us-gaap_AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
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_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14615-108349 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of claims settled and dismissed during the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 + Details
Name: | us-gaap_LossContingencyClaimsSettledAndDismissedNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349 + Details
Name: | us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | clh_ContingenciesByNatureOfContingencyAxis=clh_LegalAndAdministrativeProceedingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | clh_ContingenciesByNatureOfContingencyAxis=clh_VilleMercierMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | clh_ContingenciesByNatureOfContingencyAxis=clh_SuperfundProceedingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | clh_ContingenciesByNatureOfContingencyAxis=clh_BRFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EnvironmentalRemediationSiteAxis=clh_RemedialLiabilitiesForInactiveSitesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | clh_ContingenciesByNatureOfContingencyAxis=clh_FederalAndStateEnforcementActionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |