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INVENTORIES - Summary of Inventories (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Inventory |  |
New vehicles | $ 1,509.0 | $ 1,061.0
Used vehicles | 729.4 | 549.0
Rental vehicles | 246.7 | 217.2
Parts, accessories and other | 151.8 | 136.2
Total inventories | $ 2,636.8 | $ 1,963.4

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