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SEGMENT REPORTING (Tables) | 12 Months Ended
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Dec. 31, 2024
Segment Reporting [Abstract] |
Schedule of Reconciliation of Third Party Revenues to Direct Revenues | The following tables reconcile third-party revenues to direct revenues by Reportable Segment (in thousands):
| For the year ended December 31, 2024
| Environmental Services |  | Safety-Kleen Sustainability Solutions |  | Total Segment Revenues |  | Corporate |  | Total Consolidated Revenues
Third-party revenues | $ | 4,960,325 |  |  | $ | 929,220 |  |  | $ | 5,889,545 |  |  | $ | 407 |  |  | $ | 5,889,952 |
Intersegment revenues (expense), net | 44,422 |  |  | (44,422) |  |  | — |  |  | — |  |  | — |
Direct revenues | $ | 5,004,747 |  |  | $ | 884,798 |  |  | $ | 5,889,545 |  |  | $ | 407 |  |  | $ | 5,889,952 |
| For the year ended December 31, 2023
| Environmental Services |  | Safety-Kleen Sustainability Solutions |  | Total Segment Revenues |  | Corporate |  | Total Consolidated Revenues
Third-party revenues | $ | 4,469,909 |  |  | $ | 938,796 |  |  | $ | 5,408,705 |  |  | $ | 447 |  |  | $ | 5,409,152 |
Intersegment revenues (expense), net | 41,533 |  |  | (41,533) |  |  | — |  |  | — |  |  | — |
Direct revenues | $ | 4,511,442 |  |  | $ | 897,263 |  |  | $ | 5,408,705 |  |  | $ | 447 |  |  | $ | 5,409,152 |
| For the year ended December 31, 2022
| Environmental Services |  | Safety-Kleen Sustainability Solutions |  | Total Segment Revenues |  | Corporate |  | Total Consolidated Revenues
Third-party revenues | $ | 4,144,973 |  |  | $ | 1,021,125 |  |  | $ | 5,166,098 |  |  | $ | 507 |  |  | $ | 5,166,605 |
Intersegment revenues (expense), net | 26,733 |  |  | (26,733) |  |  | — |  |  | — |  |  | — |
Direct revenues | $ | 4,171,706 |  |  | $ | 994,392 |  |  | $ | 5,166,098 |  |  | $ | 507 |  |  | $ | 5,166,605 |
Schedule of Reconciliation to Consolidated Statements of Income to Adjusted EBITDA | The tables below present total Reportable Segment Adjusted EBITDA and the relevant significant segment expenses provided to the CODM by reported segment (in thousands):
| For the year ended December 31, 2024
| Environmental Services |  | Safety-Kleen Sustainability Solutions |  | Total Reportable Segments |  |  |  |
Direct Revenues | $ | 5,004,747 |  |  | $ | 884,798 |  |  | $ | 5,889,545 |  |  |  |  |
Cost of Revenues | 3,366,022 |  |  | 659,217 |  |  | 4,025,239 |  |  |  |  |
Selling, General and Administrative Expenses | 371,263 |  |  | 78,575 |  |  | 449,838 |  |  |  |  |
Total Reportable Segment Adjusted EBITDA | $ | 1,267,462 |  |  | $ | 147,006 |  |  | $ | 1,414,468 |  |  |  |  |
| For the year ended December 31, 2023
| Environmental Services |  | Safety-Kleen Sustainability Solutions |  | Total Reportable Segments |  |  |  |
Direct Revenues | $ | 4,511,442 |  |  | $ | 897,263 |  |  | $ | 5,408,705 |  |  |  |  |
Cost of Revenues | 3,063,043 |  |  | 646,301 |  |  | 3,709,344 |  |  |  |  |
Selling, General and Administrative Expenses | 346,791 |  |  | 78,089 |  |  | 424,880 |  |  |  |  |
Total Reportable Segment Adjusted EBITDA | $ | 1,101,608 |  |  | $ | 172,873 |  |  | $ | 1,274,481 |  |  |  |  |
| For the year ended December 31, 2022
| Environmental Services |  | Safety-Kleen Sustainability Solutions |  | Total Reportable Segments |  |  |  |
Direct Revenues | $ | 4,171,706 |  |  | $ | 994,392 |  |  | $ | 5,166,098 |  |  |  |  |
Cost of Revenues | 2,902,979 |  |  | 615,303 |  |  | 3,518,282 |  |  |  |  |
Selling, General and Administrative Expenses | 315,674 |  |  | 72,762 |  |  | 388,436 |  |  |  |  |
Total Reportable Segment Adjusted EBITDA | $ | 953,053 |  |  | $ | 306,327 |  |  | $ | 1,259,380 |  |  |  |  |
The following table presents Total Reportable Segment Adjusted EBITDA reconciled to income from operations before provision for income taxes (in thousands):
| For the years ended December 31,
| 2024 |  | 2023 |  | 2022
Adjusted EBITDA: |  |  |  |  |
Environmental Services | $ | 1,267,462 |  |  | $ | 1,101,608 |  |  | $ | 953,053 |
Safety-Kleen Sustainability Solutions | 147,006 |  |  | 172,873 |  |  | 306,327 |
Total Reportable Segment Adjusted EBITDA | 1,414,468 |  |  | 1,274,481 |  |  | 1,259,380 |
Reconciliation to Consolidated Statements of Operations: |  |  |  |  |
Corporate Costs (1) | 297,534 |  |  | 261,911 |  |  | 237,252 |
Accretion of environmental liabilities | 13,456 |  |  | 13,667 |  |  | 12,943 |
Stock-based compensation | 27,981 |  |  | 20,703 |  |  | 26,844 |
Depreciation and amortization | 400,922 |  |  | 365,761 |  |  | 347,594 |
Kimball startup costs | 4,343 |  |  | — |  |  | — |
Income from operations | 670,232 |  |  | 612,439 |  |  | 634,747 |
Other expense (income), net | 1,454 |  |  | (2,315) |  |  | (2,472) |
Loss on early extinguishment of debt | 371 |  |  | 2,880 |  |  | 422 |
Gain on sale of business | — |  |  | — |  |  | (8,864) |
Interest expense, net of interest income | 134,964 |  |  | 108,595 |  |  | 107,663 |
Income from operations before provision for income taxes | $ | 533,443 |  |  | $ | 503,279 |  |  | $ | 537,998 |
___________________________________ (1) Corporate Costs include the revenue, cost of revenues and selling, general and administrative expenses not managed through the Company’s operating segments. These costs are not captured within the Company’s Reportable Segment Adjusted EBITDA but are included in the Company’s total Adjusted EBITDA balances.
Schedule of Segment Reporting Information, by Segment | The following table presents assets by reported segment and in the aggregate (in thousands):
| December 31, 2024 |  | December 31, 2023
Property, plant and equipment, net |  |  |
Environmental Services | $ | 1,865,611 |  |  | $ | 1,651,026 |
Safety-Kleen Sustainability Solutions | 463,538 |  |  | 411,415 |
Corporate | 118,792 |  |  | 130,877 |
Total property, plant and equipment, net | $ | 2,447,941 |  |  | $ | 2,193,318 |
Goodwill and Permits and other intangibles, net |  |  |
Environmental Services |  |  |
Goodwill | $ | 1,296,204 |  |  | $ | 1,112,013 |
Permits and other intangibles, net | 549,482 |  |  | 454,919 |
Total Environmental Services | 1,845,686 |  |  | 1,566,932 |
Safety-Kleen Sustainability Solutions |  |  |
Goodwill | $ | 180,995 |  |  | $ | 175,723 |
Permits and other intangibles, net | 152,505 |  |  | 147,878 |
Total Safety-Kleen Sustainability Solutions | 333,500 |  |  | 323,601 |
Total | $ | 2,179,186 |  |  | $ | 1,890,533 |
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas | As of December 31, 2024 and 2023, the Company had property, plant and equipment, net of depreciation and amortization and permits and other intangible assets, net of amortization in the following geographic locations (in thousands):
| December 31, 2024 |  | December 31, 2023
| Total |  | % of Total |  | Total |  | % of Total
Property, plant and equipment, net |  |  |  |  |  |  |
United States | $ | 2,249,155 |  |  | 91.9 | % |  | $ | 1,972,221 |  |  | 89.9 | %
Canada and other foreign | 198,786 |  |  | 8.1 |  |  | 221,097 |  |  | 10.1 |
Total property, plant and equipment, net | $ | 2,447,941 |  |  | 100.0 | % |  | $ | 2,193,318 |  |  | 100.0 | %
Permits and other intangibles, net |  |  |  |  |  |  |
United States | $ | 674,246 |  |  | 96.0 | % |  | $ | 570,049 |  |  | 94.6 | %
Canada | 27,741 |  |  | 4.0 |  |  | 32,748 |  |  | 5.4 |
Total permits and other intangibles, net | $ | 701,987 |  |  | 100.0 | % |  | $ | 602,797 |  |  | 100.0 | %
Schedule of Long-lived Assets by Geographic Areas | The following table presents the total assets by geographical area (in thousands):
| December 31, 2024 |  | December 31, 2023 |  |
United States | $ | 6,756,813 |  |  | $ | 5,786,937 |  |  |
Canada and other foreign | 620,465 |  |  | 595,932 |  |  |
Total | $ | 7,377,278 |  |  | $ | 6,382,869 |  |  |

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