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Note 2. Acquisitions and Discontinued Operations - Discontinued Operations (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of discontinued operations, net of provision (benefit) for income taxes of $(1.4), $51.9, and $— | $ 0.0 | $ 0.0 | $ (4.6) | $ (1.1) | $ 131.4 | $ 0.0 | $ 0.0 | $ 0.0 | $ (5.7) | $ 131.4 | $ 0.0
Discontinued Operation, Tax Effect of Discontinued Operation |  |  |  |  |  |  |  |  | (1.1) | 3.5 | 5.5
Income (loss) from discontinued operations, net of provision (benefit) for income taxes of $(1.1), $3.5, and $5.5 | $ (6.6) | $ (3.4) | $ (3.4) | $ (6.9) | $ (13.2) | $ 10.4 | $ 7.6 | $ 6.3 | (20.3) | 11.1 | 24.3
Amounts reclassified to discontinued operations, net of tax |  |  |  |  |  |  |  |  | 1.3 | 0.0 | 0.0
Sale of Highway Products |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax |  |  |  |  |  |  |  |  | (5.8) |  |
Gain (loss) on sale of discontinued operations, net of provision (benefit) for income taxes of $(1.4), $51.9, and $— |  |  |  |  |  |  |  |  | (4.4) |  |
Disposal Group, Including Discontinued Operation, Revenue |  |  |  |  |  |  |  |  | 0.0 | 296.5 | 249.7
Disposal Group, Including Discontinued Operation, Costs of Goods Sold |  |  |  |  |  |  |  |  | 0.0 | 216.6 | 178.7
Disposal Group, Including Discontinued Operation, General and Administrative Expense |  |  |  |  |  |  |  |  | 21.4 | 65.3 | 41.2
Disposal Group, Including Discontinued Operations, Restructuring Activities |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.1
Disposal Group, Including Discontinued Operation, Other Income |  |  |  |  |  |  |  |  | 0.0 | 0.0 | (0.3)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax |  |  |  |  |  |  |  |  | (21.4) | 14.6 | 30.0
Discontinued Operation, Tax Effect of Discontinued Operation |  |  |  |  |  |  |  |  | (1.1) | 2.7 | 5.6
Income (loss) from discontinued operations, net of provision (benefit) for income taxes of $(1.1), $3.5, and $5.5 |  |  |  |  |  |  |  |  | (20.3) | 11.9 | 24.4
Sale of Highway Products | Proceeds from (Payments to) related to the Sale of Discontinued Operations, Net of Cash Divested |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net cash used in investing activities – discontinued operations |  |  |  |  |  |  |  |  | (2.7) |  |
Proceeds (payments) related to sale of discontinued operations |  |  |  |  |  |  |  |  | $ (2.7) | 364.7 | 0.0
Spin-Off of Arcosa |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  | $ 0.8 | $ 0.1

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