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Floor Plan Financing - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Jul. 31, 2024
Debt Instrument [Line Items]
Interest expense	$ 15.4	$ 8.1	$ 28.3	$ 14.9
Daimler Truck Financial | Line of Credit
Debt Instrument [Line Items]
Debt instrument, interest free period (up to)			150 days
Maximum borrowing capacity	175.0		$ 175.0
Daimler Truck Financial | Line of Credit | Prime Rate
Debt Instrument [Line Items]
Debt instrument, basis spread			0.80%
PACCAR Financial Corp | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	125.0		$ 125.0
PACCAR Financial Corp | Line of Credit | Prime Rate
Debt Instrument [Line Items]
Debt instrument, basis spread			(0.71%)
FMCC Facility | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	30.0		$ 30.0
FMCC Facility | Line of Credit | Subsequent Event
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 42.0
PNC Equipment Finance, LLC | Line of Credit | Revolving Credit Facility | PNC Equipment Finance, LLC
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 480.0		$ 480.0
PNC Equipment Finance, LLC | Line of Credit | Revolving Credit Facility | PNC Equipment Finance, LLC | Subsequent Event
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 500.0
PNC Equipment Finance, LLC | Line of Credit | Secured Overnight Financing Rate (SOFR) | Revolving Credit Facility | PNC Equipment Finance, LLC
Debt Instrument [Line Items]
Debt instrument, basis spread			3.00%

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