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Inventories (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Inventories |  |  |  |  |
Retail automotive dealership new vehicles | $ 763.6 |  | $ 763.6 |  | $ 1,810.9
Retail automotive dealership used vehicles | 1,130.0 |  | 1,130.0 |  | 1,019.7
Retail automotive parts, accessories and other | 117.5 |  | 117.5 |  | 117.2
Retail commercial truck dealership vehicles and parts | 315.2 |  | 315.2 |  | 223.1
Commercial vehicle distribution vehicles, parts and engines | 272.1 |  | 272.1 |  | 254.7
Total inventories | 2,598.4 |  | 2,598.4 |  | $ 3,425.6
Interest credits and advertising assistance | $ 14.4 | $ 13.6 | $ 51.5 | $ 37.8 |

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- Definition Represents the carrying amount of commercial distribution vehicle inventory, net of valuation reserves. + References No definition available. + Details
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- Definition Represents the carrying amount of commercial vehicle inventory, net of valuation reserves. + References No definition available. + Details
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- Definition Carrying amount of new vehicle inventory, net of valuation reserves. + References No definition available. + Details
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- Definition Carrying amount of parts, accessories and other inventory, net of valuation reserves. + References No definition available. + Details
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- Definition Carrying amount of used vehicle inventory, net of valuation reserves. + References No definition available. + Details
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- Definition Floor plan interest credits and advertising assistance received from vendors, which reduce the cost of sales. + References No definition available. + Details
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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6676-107765 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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