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INVENTORIES - Summary of Inventories (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Inventory |  |
New vehicles | $ 1,061.0 | $ 536.2
Used vehicles | 549.0 | 537.3
Rental vehicles | 217.2 | 155.0
Parts, accessories and other | 136.2 | 128.0
Total inventories | $ 1,963.4 | $ 1,356.6

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