XML 56 R45.htm IDEA: XBRL DOCUMENT
v3.24.2

BUSINESS COMBINATIONS - Additional Information (Details) - USD ($) $ in Millions | Mar. 22, 2024 | Mar. 01, 2024 | Mar. 31, 2023
--- | --- | --- | ---
HEPACO |  |  |
Business Acquisition [Line Items] |  |  |
Purchase price to acquire business | $ 395.6 |  |
Weighted average useful life of acquired intangible assets | 19 years |  |
HEPACO | Minimum |  |  |
Business Acquisition [Line Items] |  |  |
Intangible asset, estimated useful life | 7 years |  |
HEPACO | Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Intangible asset, estimated useful life | 20 years |  |
Noble Oil Services , Inc. Acquisition |  |  |
Business Acquisition [Line Items] |  |  |
Purchase price to acquire business |  | $ 68.7 |
Weighted average useful life of acquired intangible assets |  | 13 years |
Noble Oil Services , Inc. Acquisition | Minimum |  |  |
Business Acquisition [Line Items] |  |  |
Intangible asset, estimated useful life |  | 7 years |
Noble Oil Services , Inc. Acquisition | Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Intangible asset, estimated useful life |  | 15 years |
Thompson Industrial |  |  |
Business Acquisition [Line Items] |  |  |
Purchase price to acquire business |  |  | $ 110.9
Weighted average useful life of acquired intangible assets |  |  | 13 years
Thompson Industrial | Minimum |  |  |
Business Acquisition [Line Items] |  |  |
Intangible asset, estimated useful life |  |  | 5 years
Thompson Industrial | Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Intangible asset, estimated useful life |  |  | 15 years

X
- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 + Details
Name: | us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-5 + Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 30 -Paragraph 8 -SubTopic 30 -Topic 805 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479637/805-30-30-8 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -SubTopic 30 -Topic 805 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 30 -Paragraph 7 -SubTopic 30 -Topic 805 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479637/805-30-30-7 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=clh_HEPACOMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=clh_NobleOilServicesInc.AcquisitionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=clh_ThompsonIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |