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INVENTORIES - Summary of Inventories (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Inventory |  |
New vehicles | $ 254.8 | $ 891.2
Used vehicles | 596.6 | 366.1
Rental vehicles | 114.7 | 110.7
Parts, accessories and other | 107.1 | 78.5
Total inventories | $ 1,073.1 | $ 1,446.4

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