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PROPERTY, PLANT AND EQUIPMENT - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Property, Plant and Equipment [Abstract]
Depreciation expense, inclusive of landfill and finance lease amortization	$ 101.3	$ 86.2	$ 302.5	$ 254.9
Interest costs capitalized		$ 3.3		$ 8.6

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- Definition

Depreciation Expense, Inclusive Of Landfill And Finance Lease Amortization

+ References

No definition available.

+ Details

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Namespace Prefix:	clh_
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Balance Type:	debit
Period Type:	duration

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- Definition

Amount of interest capitalized during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483013/835-20-50-1

+ Details

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- References

No definition available.

+ Details

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