XML 55 R43.htm IDEA: XBRL DOCUMENT v3.25.1

ASSETS AND LIABILITIES HELD FOR SALE - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($) dealership franchise property	Mar. 31, 2024 USD ($)	Dec. 31, 2024 dealership franchise
Long Lived Assets Held-for-sale [Line Items]
Asset impairments	$ 14.3	$ 0.0
Held-for-sale | Franchise
Long Lived Assets Held-for-sale [Line Items]
Number of assets held-for-sale | franchise	10		7
Asset impairments	$ 14.3
Held-for-sale | Dealership Location
Long Lived Assets Held-for-sale [Line Items]
Number of assets held-for-sale | dealership	10		6
Held-for-sale | Real Estate
Long Lived Assets Held-for-sale [Line Items]
Number of assets held-for-sale | property	1

X

- Definition

Number Of Assets Held-For-Sale

+ References

No definition available.

+ Details

Name:	abg_NumberOfAssetsHeldForSale
Namespace Prefix:	abg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482130/360-10-45-4

+ Details

Name:	us-gaap_AssetImpairmentCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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.

+ References

No definition available.

+ Details

Name:	us-gaap_LongLivedAssetsHeldForSaleLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=us-gaap_FranchiseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=abg_DealershipLocationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=us-gaap_RealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: