XML 57 R46.htm IDEA: XBRL DOCUMENT
v3.24.3

ASSETS AND LIABILITIES HELD FOR SALE - Narrative (Details) - Held-for-sale | Sep. 30, 2024 property franchise dealership | Dec. 31, 2023 property franchise dealership
--- | --- | ---
Franchise |  |
Long Lived Assets Held-for-sale [Line Items] |  |
Number of assets held-for-sale | franchise | 6 | 11
Dealership Location |  |
Long Lived Assets Held-for-sale [Line Items] |  |
Number of assets held-for-sale | dealership | 6 | 11
Real Estate |  |
Long Lived Assets Held-for-sale [Line Items] |  |
Number of assets held-for-sale | property | 1 | 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 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: |