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Derivative Financial Instruments - Narrative (Details) $ in Millions | Oct. 02, 2020 USD ($) | Jun. 01, 2019 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) option
--- | --- | --- | --- | ---
Derivative [Line Items] |  |  |  |
Non-trade floor plan notes payable |  |  | $ 1,480.7 | $ 1,563.0
Amount of net losses expected to reclassify from AOCI into interest expense in earnings within the next twelve months |  |  | 2.7 |
Interest Rate Cap | Not Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Number of derivative instruments | option |  |  |  | 2
Interest Rate Contract |  |  |  |
Derivative [Line Items] |  |  |  |
Agreement term |  | 5 years |  |
Aggregate notional amount |  | $ 300.0 |  |
Non-trade floor plan notes payable |  | $ 1,500.0 |  |
Interest Rate Contract | Not Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Agreement term | 5 years |  |  |
Aggregate notional amount | $ 60.0 |  |  |
Derivative liability |  |  | 1.2 |
Derivative asset |  |  | $ 1.2 |

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- Definition Amounts borrowed to finance the purchase of specific new and program vehicle inventories with lenders that are not captive finance subsidiaries of the manufacturer. + References No definition available. + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 + Details
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