XML 52 R39.htm IDEA: XBRL DOCUMENT
v3.22.4

CLOSURE AND POST-CLOSURE LIABILITIES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Closure and Post-Closure Liabilities | The changes to closure and post-closure liabilities (also referred to as "asset retirement obligations") from January 1, 2021 through December 31, 2022 were as follows (in thousands):
| Landfill Retirement Liability |  | Non-Landfill Retirement Liability |  | Total
Balance at January 1, 2021 | $ | 48,412 |  |  | $ | 39,514 |  |  | $ | 87,926 |
Liabilities assumed in acquisitions | — |  |  | 1,446 |  |  | 1,446 |
New asset retirement obligations | 2,443 |  |  | — |  |  | 2,443 |
Accretion | 3,655 |  |  | 3,702 |  |  | 7,357 |
Changes in estimates recorded to consolidated statement of operations | 2,287 |  |  | 396 |  |  | 2,683 |
Changes in estimates recorded to consolidated balance sheet | 2,297 |  |  | 1,415 |  |  | 3,712 |
Expenditures | (5,818) |  |  | (784) |  |  | (6,602) |
Currency translation and other | 149 |  |  | (11) |  |  | 138 |
Balance at December 31, 2021 | 53,425 |  |  | 45,678 |  |  | 99,103 |
Liabilities assumed in acquisitions | — |  |  | 55 |  |  | 55 |
Measurement period adjustments from prior period acquisitions | — |  |  | 1,148 |  |  | 1,148 |
New asset retirement obligations | 3,743 |  |  | — |  |  | 3,743 |
Accretion | 4,605 |  |  | 4,147 |  |  | 8,752 |
Changes in estimates recorded to consolidated statement of operations | 1,063 |  |  | 5,712 |  |  | 6,775 |
Changes in estimates recorded to consolidated balance sheet | 3,219 |  |  | 1,742 |  |  | 4,961 |
Expenditures | (3,373) |  |  | (1,778) |  |  | (5,151) |
Currency translation and other | (431) |  |  | (154) |  |  | (585) |
Balance at December 31, 2022 | $ | 62,251 |  |  | $ | 56,550 |  |  | $ | 118,801 |
Schedule of Expected Payments Related to Asset Retirement Obligations | Anticipated payments (based on current estimated costs and anticipated timing of necessary regulatory approvals to commence work on closure and post-closure activities) for each of the next five years and thereafter are as follows (in thousands):
Years ending December 31, |
2023 | $ | 14,414 |
2024 | 14,733 |
2025 | 12,808 |
2026 | 8,369 |
2027 | 7,420 |
Thereafter | 290,366 |
Undiscounted closure and post-closure liabilities | 348,110 |
Less: Discount at credit-adjusted risk-free rate | (153,062) |
Less: Undiscounted estimated closure and post-closure liabilities relating to airspace not yet consumed | (76,247) |
Present value of closure and post-closure liabilities | $ | 118,801 |

X
- Definition Schedule of Expected Payments Related to Asset Retirement Obligations [Table Text Block] + References No definition available. + Details
Name: | clh_ScheduleOfExpectedPaymentsRelatedToAssetRetirementObligationsTableTextBlock
Namespace Prefix: | clh_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
Name: | us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration