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Description of Business and Summary of Significant Accounting Policies (Organization and Business, Inventory) (Details)	12 Months Ended
	Dec. 31, 2023 store brand franchises
Product Information [Line Items]
Owned and operated new vehicle franchises | franchises	349
Number of brands | brand	34
Percentage of new vehicle sales from core brands (percent)	88.00%
Dealerships [Member]
Product Information [Line Items]
Number of stores	252
Collision Center [Member]
Product Information [Line Items]
Number of stores	53
AutoNation USA Stores [Member]
Product Information [Line Items]
Number of stores	19
Automotive Auction Operations [Member]
Product Information [Line Items]
Number of stores	4
Parts Distribution Centers [Member]
Product Information [Line Items]
Number of stores	3

X

- Definition

The number of new vehicle brands sold by the company's stores.

+ References

No definition available.

+ Details

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- Definition

Represents the number of owned and operated new vehicle franchises.

+ References

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+ Details

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- Definition

The percentage of new vehicles sold that represent the core brands of new vehicles sold by the company.

+ References

No definition available.

+ Details

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- Definition

Represents the number of stores.

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No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Details

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- Details

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- Details

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