XML 64 R44.htm IDEA: XBRL DOCUMENT
v3.25.0.1

REMEDIAL LIABILITIES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Environmental Remediation Obligations [Abstract] |
Schedule of Changes to Remedial Liabilities | The changes to remedial liabilities from January 1, 2023 through December 31, 2024 were as follows (in thousands):
| Remedial Liabilities for Landfill Sites |  | Remedial Liabilities for Inactive Sites |  | Remedial Liabilities (Including Superfund) for Non-Landfill Operations |  | Total
Balance at January 1, 2023 | $ | 1,824 |  |  | $ | 59,749 |  |  | $ | 54,717 |  |  | $ | 116,290 |
Accretion | 89 |  |  | 2,540 |  |  | 1,561 |  |  | 4,190 |
Changes in estimates recorded to consolidated statement of operations | 19 |  |  | 1,713 |  |  | 1,896 |  |  | 3,628 |
Environmental expenditures | (52) |  |  | (3,840) |  |  | (9,384) |  |  | (13,276) |
Currency translation and other | — |  |  | 115 |  |  | 296 |  |  | 411 |
Balance at December 31, 2023 | 1,880 |  |  | 60,277 |  |  | 49,086 |  |  | 111,243 |
Liabilities assumed in acquisitions | — |  |  | — |  |  | 5,192 |  |  | 5,192 |
Accretion | 92 |  |  | 2,292 |  |  | 1,514 |  |  | 3,898 |
Changes in estimates recorded to consolidated statement of operations | 29 |  |  | 573 |  |  | 3,762 |  |  | 4,364 |
Expenditures | (53) |  |  | (6,078) |  |  | (5,715) |  |  | (11,846) |
Currency translation and other | — |  |  | (28) |  |  | (1,078) |  |  | (1,106) |
Balance at December 31, 2024 | $ | 1,948 |  |  | $ | 57,036 |  |  | $ | 52,761 |  |  | $ | 111,745 |
Schedule of Remedial Liabilities Anticipated Payments for Each of the Next Five Years | Anticipated payments at December 31, 2024 (based on current estimated costs and anticipated timing of necessary regulatory approvals to commence work on remedial activities) for each of the next five years and thereafter were as follows (in thousands):
Years ending December 31, |
2025 | $ | 10,321 |
2026 | 17,391 |
2027 | 11,259 |
2028 | 10,972 |
2029 | 8,745 |
Thereafter | 70,610 |
Undiscounted remedial liabilities | 129,298 |
Less: Discount at risk free rates | (17,553) |
Total remedial liabilities | $ | 111,745 |
Schedule of Environmental Exit Costs by Cost | The following table presents the Company's estimated remedial liabilities and reasonably possible additional liabilities as of December 31, 2024 disaggregated by facility/site type (in thousands, except percentages):
Type of Facility or Site | Remedial Liabilities |  | % of Total |  | Reasonably Possible Additional Liabilities (1)
Inactive facilities not used in active conduct of the Company's business, most of which were assumed through prior period acquisitions (25 facilities) | $ | 56,976 |  |  | 51.0 | % |  | $ | 10,765 |
Facilities now used in active conduct of the Company's business (62 facilities, including 24 acquired by the Company through acquisitions in 2024) | 46,131 |  |  | 41.3 |  |  | 9,497 |
Superfund sites (12 sites) | 8,638 |  |  | 7.7 |  |  | 1,296 |
Total | $ | 111,745 |  |  | 100.0 | % |  | $ | 21,558 |
___________________________________ (1)Amounts represent the high end of the range of management's best estimate of the reasonably possible additional liabilities. The following table presents the Company's estimated remedial liabilities and reasonably possible additional liabilities as of December 31, 2024 disaggregated by facilities/sites which represent at least 5% of the total and with all other facilities/ sites combined (in thousands, except percentages):
Location |  | Type of Facility or Site |  | Remedial Liabilities(1) |  | % of Total |  | Reasonably Possible Additional Liabilities(2)
Baton Rouge, LA |  | Closed incinerator and landfill |  | $ | 25,578 |  |  | 22.9 | % |  | $ | 4,303 |
Bridgeport, NJ |  | Closed incinerator |  | 17,417 |  |  | 15.6 |  |  | 3,254 |
Mercier, Quebec |  | Idled incinerator |  | 10,826 |  |  | 9.7 |  |  | 1,631 |
Linden, NJ |  | Operating solvent recycling center |  | 9,434 |  |  | 8.4 |  |  | 2,148 |
Various |  | All other incinerators, landfills, wastewater treatment facilities and service centers (83 facilities, including 24 acquired by the Company through acquisitions in 2024) |  | 39,852 |  |  | 35.7 |  |  | 8,926 |
Various |  | Superfund sites (each representing less than 5% of total liabilities) (12 sites) |  | 8,638 |  |  | 7.7 |  |  | 1,296 |
Total |  |  |  | $ | 111,745 |  |  | 100.0 | % |  | $ | 21,558 |
_________________________________ (1)$23.3 million of the $111.7 million remedial liabilities include estimates related to the legal and administrative proceedings discussed in Note 18, "Commitments and Contingencies." (2)Amounts represent the high end of the range of management's best estimate of the reasonably possible additional liabilities.

X
- Definition Remedial Liabilities Anticipated Payments for Each of the Next Five Years [Table Text Block] + References No definition available. + Details
Name: | clh_RemedialLiabilitiesAnticipatedPaymentsForEachOfNextFiveYearsTableTextBlock
Namespace Prefix: | clh_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of material liabilities for remediation, site restoration, postclosure, monitoring commitments, or other exit costs that may occur on the sale, disposal or abandonment of a property as a result of unanticipated contamination of the assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480102/450-20-S99-1 + Details
Name: | us-gaap_EnvironmentalExitCostsByCostTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EnvironmentalRemediationObligationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of environmental loss contingencies by individual site. Does not include loss contingencies that are not environmental in nature. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480102/450-20-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480102/450-20-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481931/410-30-50-10 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481931/410-30-50-10 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (d)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481931/410-30-50-10 + Details
Name: | us-gaap_ScheduleOfEnvironmentalLossContingenciesBySiteTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration