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Inventories (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Inventory [Line Items] |  |
Total inventories | $ 3,509.1 | $ 3,129.0
Retail automotive dealership new vehicles |  |
Inventory [Line Items] |  |
Total inventories | 1,326.5 | 869.1
Retail automotive dealership used vehicles |  |
Inventory [Line Items] |  |
Total inventories | 1,279.6 | 1,420.0
Retail automotive parts, accessories, and other |  |
Inventory [Line Items] |  |
Total inventories | 145.6 | 126.4
Retail commercial truck dealership vehicles and parts |  |
Inventory [Line Items] |  |
Total inventories | 506.2 | 436.7
Commercial vehicle distribution vehicles, parts, and engines |  |
Inventory [Line Items] |  |
Total inventories | $ 251.2 | $ 276.8

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