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Segment Information - Total Assets, Equity Method Investments, and Capital Expenditures by Reportable Segment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | $ 368.7 | $ 375.3 | $ 282.5
Retail Automotive |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 322.3 | 306.9 | 245.6
Retail Commercial Truck |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 41.0 | 60.1 | 31.2
Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 5.4 | 8.3 | 5.7
Non-Automotive Investments |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | $ 0.0 | $ 0.0 | $ 0.0

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- Definition The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 50 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480060/805-50-25-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 50 -Name Accounting Standards Codification -Section 30 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480027/805-50-30-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 50 -Name Accounting Standards Codification -Section 30 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480027/805-50-30-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 13 -Subparagraph (c) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-13 + Details
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