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Discontinued Operations and Disposal Groups (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Discontinued Operations and Disposal Groups [Abstract] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Revenue |  |  | $ 1,506.6 |  |
Disposal Group, Including Discontinued Operation, Costs of Goods Sold |  |  | 1,244.5 |  |
Disposal Group, Including Discontinued Operation, Gross Profit (Loss) |  |  | 262.1 |  |
Disposal Group, Including Discontinued Operation, General and Administrative Expense |  |  | 184.1 |  |
Disposal Group, Including Discontinued Operation, Depreciation and Amortization |  |  | 31.9 |  |
Disposal Group, Including Discontinued Operation, Restructuring and other charges |  |  | 3.0 |  |
Disposal Group, Including Discontinued Operation, Operating Income (Loss) |  |  | 43.1 |  |
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax |  |  | 45.6 |  |
Discontinued Operation, Tax Effect of Discontinued Operation |  |  | 6.8 |  |
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | $ 0.0 | $ 0.0 | 0.0 | $ 38.8 |
Disposal Group, Including Discontinued Operation, Fortrea Senior Notes |  |  |  |  | $ 570.0
Disposal Group, Including Discontinued Operation, Fortrea Senior Notes Interest Rate |  |  |  |  | 7.50%
Disposal Group, Including Discontinued Operation, Fortrea Distribution | $ 1,600.0 |  | 1,600.0 |  |
Disposal Group, Including Discontinued Operation, Fortrea Credit Facilities |  |  |  |  | $ 1,520.0
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Fortrea Credit Facilities |  |  |  |  | 1,520.0
Disposal Group, Including Discontinued Operations, Other Nonoperating income (expense) |  |  | 2.5 |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  |  | $ 38.8 |  |
Fortrea Revolver due 2028 |  |  |  |  |
Discontinued Operations and Disposal Groups [Abstract] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Fortrea Credit Facilities |  |  |  |  | 450.0
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Fortrea Credit Facilities |  |  |  |  | 450.0
Fortrea Term Loan A maturing 2028 |  |  |  |  |
Discontinued Operations and Disposal Groups [Abstract] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Fortrea Credit Facilities |  |  |  |  | 500.0
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Fortrea Credit Facilities |  |  |  |  | 500.0
Fortrea Term Loan B maturing 2028 |  |  |  |  |
Discontinued Operations and Disposal Groups [Abstract] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Fortrea Credit Facilities |  |  |  |  | 570.0
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Fortrea Credit Facilities |  |  |  |  | $ 570.0

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