Revenues - Contract Balances (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2023	Dec. 31, 2022
Contract Balances
Accounts receivable	$ 958.8	$ 906.7
Unearned revenues	280.3	291.7
Unearned revenue recognized as revenue	197.5
Contracts in transit
Contract Balances
Accounts receivable	289.4	281.7
Vehicle receivables
Contract Balances
Accounts receivable	147.3	235.1
Manufacturer receivables
Contract Balances
Accounts receivable	192.8	178.9
Trade receivables
Contract Balances
Accounts receivable	$ 287.1	$ 191.1

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No definition available.

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

+ References

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-Topic 606
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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

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- Definition

The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.

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