$ABG
ASBURY AUTOMOTIVE GROUP INC Stock $abg

$abg Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000114498024000076 Filed on February 29, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$4.201B	$3.812B	$14.80B
YoY Change	17.28%	2.85%	-4.09%
Cost Of Revenue	$3.451B	$3.139B	$12.05B
YoY Change	19.58%	5.75%	-2.32%
Gross Profit	$750.0M	$673.0M	$2.756B
YoY Change	7.73%	-8.81%	-11.12%
Gross Profit Margin	17.85%	17.66%	18.62%
Selling, General & Admin	$468.6M	$414.0M	$1.617B
YoY Change	16.28%	-1.78%	-8.28%
% of Gross Profit	62.48%	61.52%	58.69%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$18.70M	$17.20M	$67.70M
YoY Change	11.98%	11.69%	-1.88%
% of Gross Profit	2.49%	2.56%	2.46%
Operating Expenses	$468.6M	$431.2M	$1.685B
YoY Change	16.28%	-0.96%	-4.44%
Operating Profit	$262.8M	$241.8M	$1.071B
YoY Change	-4.95%	-20.09%	-15.87%
Interest Expense	-$66.90M	-$49.00M	-$165.7M
YoY Change	76.52%	20.1%	3.18%
% of Operating Profit	-25.46%	-20.26%	-15.48%
Other Income/Expense, Net	-$66.90M	$0.00	-$152.2M
YoY Change	76.05%		-427.31%
Pretax Income	$195.8M	$75.60M	$801.3M
YoY Change	-17.9%	-83.72%	-39.25%
Income Tax	$48.80M	$20.10M	$198.8M
% Of Pretax Income	24.92%	26.59%	24.81%
Net Earnings	$147.1M	$55.50M	$602.5M
YoY Change	-18.91%	-84.29%	-39.59%
Net Earnings / Revenue	3.5%	1.46%	4.07%
Basic Earnings Per Share	$7.24		$28.87
Diluted Earnings Per Share	$7.21	$2.71	$28.69
COMMON SHARES
Basic Shares Outstanding	20.40M shares	20.58M shares	20.90M shares
Diluted Shares Outstanding	20.40M shares		21.00M shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments	$35.90M	$51.90M	$51.90M
YoY Change	-88.12%	-78.44%	-78.44%
Cash & Equivalents	$29.00M	$45.70M	$45.70M
Short-Term Investments	$6.900M	$6.200M	$6.200M
Other Short-Term Assets	$332.0M	$388.9M	$951.8M
YoY Change	11.11%	34.99%	96.41%
Inventory	$1.863B	$1.768B	$1.768B
Prepaid Expenses		$41.40M
Receivables	$139.4M	$137.9M	$191.7M
Other Receivables	$87.50M	$88.20M	$93.40M
Total Short-Term Assets	$2.922B	$3.057B	$3.057B
YoY Change	42.54%	60.07%	60.07%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.408B	$2.316B	$2.558B
YoY Change	24.76%	19.3%	17.51%
Goodwill	$2.015B	$2.009B
YoY Change	12.98%	12.65%
Intangibles
YoY Change
Long-Term Investments	$334.7M	$326.7M	$326.7M
YoY Change	19.2%	39.02%	39.02%
Other Assets	$127.4M	$113.3M	$113.3M
YoY Change	29.87%	-2.91%	-2.91%
Total Long-Term Assets	$7.209B	$7.102B	$7.102B
YoY Change	17.55%	16.21%	16.21%
TOTAL ASSETS
Total Short-Term Assets	$2.922B	$3.057B	$3.057B
Total Long-Term Assets	$7.209B	$7.102B	$7.102B
Total Assets	$10.13B	$10.16B	$10.16B
YoY Change	23.81%	26.65%	26.65%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$723.6M	$155.6M	$155.6M
YoY Change	7.65%	-75.88%	5.56%
Accrued Expenses	$26.00M	$7.300M	$297.6M
YoY Change	15.04%	-69.07%	-10.17%
Deferred Revenue	$230.9M	$228.6M
YoY Change	4.1%	4.43%
Short-Term Debt	$1.690B	$1.786B	$2.025B
YoY Change	3607.02%	3401.37%	1291.62%
Long-Term Debt Due	$84.40M	$84.90M	$84.90M
YoY Change	1.56%	0.47%	0.47%
Total Short-Term Liabilities	$2.757B	$2.876B	$2.876B
YoY Change	158.11%	178.28%	178.28%
LONG-TERM LIABILITIES
Long-Term Debt	$3.108B	$3.121B	$3.121B
YoY Change	-2.71%	-2.97%	-2.97%
Other Long-Term Liabilities	$53.50M	$51.70M	$782.0M
YoY Change	-2.9%	-3.36%	1.96%
Total Long-Term Liabilities	$53.50M	$51.70M	$3.903B
YoY Change	-2.9%	-3.36%	-2.02%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.757B	$2.876B	$2.876B
Total Long-Term Liabilities	$53.50M	$51.70M	$3.903B
Total Liabilities	$2.811B	$2.927B	$6.915B
YoY Change	150.21%	169.33%	35.12%
SHAREHOLDERS EQUITY
Retained Earnings	$3.062B	$2.962B
YoY Change	10.79%	13.46%
Common Stock	$1.297B	$1.289B
YoY Change	0.63%	0.55%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$1.078B	$1.067B
YoY Change	1.24%	0.4%
Treasury Stock Shares
Shareholders Equity	$3.347B	$3.244B	$3.244B
YoY Change
Total Liabilities & Shareholders Equity	$10.13B	$10.16B	$10.16B
YoY Change	23.81%	26.65%	26.65%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$147.1M	$55.50M	$602.5M
YoY Change	-18.91%	-84.29%	-39.59%
Depreciation, Depletion And Amortization	$18.70M	$17.20M	$67.70M
YoY Change	11.98%	11.69%	-1.88%
Cash From Operating Activities	$177.1M	$73.20M	$313.0M
YoY Change	3.15%	131.65%	-55.03%
INVESTING ACTIVITIES
Capital Expenditures	$105.0M	$65.80M	$142.3M
YoY Change	590.79%	86.93%	31.88%
Acquisitions			$1.500B
YoY Change			29900.0%
Other Investing Activities	$91.40M	-$1.522B	-$1.536B
YoY Change	-328.5%	-670.33%	-368.27%
Cash From Investing Activities	-$13.60M	-$1.588B	-$1.678B
YoY Change	-75.36%	-785.37%	-461.18%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$180.2M	1.519B	$1.176B
YoY Change	227.64%	-997.16%	-206.47%
NET CHANGE
Cash From Operating Activities	$177.1M	73.20M	$313.0M
Cash From Investing Activities	-$13.60M	-1.588B	-$1.678B
Cash From Financing Activities	-$180.2M	1.519B	$1.176B
Net Change In Cash	-$16.70M	4.100M	-$189.6M
YoY Change	-127.15%	-95.64%	-436.17%
FREE CASH FLOW
Cash From Operating Activities	$177.1M	$73.20M	$313.0M
Capital Expenditures	$105.0M	$65.80M	$142.3M
Free Cash Flow	$72.10M	$7.400M	$170.7M
YoY Change	-53.93%	-305.56%	-70.97%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	abg	Purchasesof Treasury Stock PurchasesofTreasuryStock	-287400000	usd
CY2021	abg	Purchasesof Treasury Stock PurchasesofTreasuryStock	0	usd
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	11400000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	9200000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1175800000	usd
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	21000000.0	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	22400000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20100000	shares
CY2022	us-gaap	Net Income Loss NetIncomeLoss	997300000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	532400000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	6300000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-4000000.0	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	24300000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	1600000	usd
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0001144980
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilitiesNoncurrent
CY2022Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilitiesNoncurrent
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#PropertyPlantAndEquipmentNet
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#PropertyPlantAndEquipmentNet
CY2023Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#LongTermDebtAndCapitalLeaseObligationsCurrent
CY2022Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#LongTermDebtAndCapitalLeaseObligationsCurrent
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#LongTermDebtAndCapitalLeaseObligations
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#LongTermDebtAndCapitalLeaseObligations
CY2023	dei	Document Type DocumentType	10-K
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	001-31262
CY2023	dei	Entity File Number EntityFileNumber	001-31262
CY2023	dei	Entity Registrant Name EntityRegistrantName	ASBURY AUTOMOTIVE GROUP, INC
CY2023	dei	Entity Registrant Name EntityRegistrantName	ASBURY AUTOMOTIVE GROUP, INC
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	01-0609375
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	2905 Premiere Parkway, NW,
CY2023	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 300
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Duluth,
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	GA
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	30097
CY2023	dei	City Area Code CityAreaCode	770
CY2023	dei	City Area Code CityAreaCode	770
CY2023	dei	Local Phone Number LocalPhoneNumber	418-8200
CY2023	dei	Local Phone Number LocalPhoneNumber	418-8200
CY2023	dei	Security12b Title Security12bTitle	Common stock, $0.01 par value per share
CY2023	dei	Trading Symbol TradingSymbol	ABG
CY2023	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	4920000000	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	20404121	shares
CY2023	dei	Auditor Firm AuditorFirmId	42
CY2023	dei	Auditor Name AuditorName	Ernst & Young LLP
CY2023	dei	Auditor Name AuditorName	Ernst & Young LLP
CY2023	dei	Auditor Location AuditorLocation	Atlanta, Georgia
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	45700000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	235300000	usd
CY2023Q4	us-gaap	Short Term Investments ShortTermInvestments	6200000	usd
CY2022Q4	us-gaap	Short Term Investments ShortTermInvestments	5400000	usd
CY2023Q4	abg	Contracts In Transit ContractsInTransit	279700000	usd
CY2022Q4	abg	Contracts In Transit ContractsInTransit	220800000	usd
CY2023Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	226100000	usd
CY2022Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	171900000	usd
CY2023Q4	us-gaap	Inventory Net InventoryNet	1768300000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	959200000	usd
CY2023Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group Current AssetsHeldForSaleNotPartOfDisposalGroupCurrent	342200000	usd
CY2022Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group Current AssetsHeldForSaleNotPartOfDisposalGroupCurrent	29100000	usd
CY2023Q4	us-gaap	Other Assets Current OtherAssetsCurrent	388900000	usd
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	288100000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	3057100000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	1909800000	usd
CY2023Q4	abg	Investments Noncurrent InvestmentsNoncurrent	326700000	usd
CY2022Q4	abg	Investments Noncurrent InvestmentsNoncurrent	235000000.0	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2315700000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1941000000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	241800000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	235400000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	2009000000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	1783400000	usd
CY2023Q4	us-gaap	Indefinite Lived Franchise Rights IndefiniteLivedFranchiseRights	2095800000	usd
CY2022Q4	us-gaap	Indefinite Lived Franchise Rights IndefiniteLivedFranchiseRights	1800100000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	113300000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	116700000	usd
CY2023Q4	us-gaap	Assets Assets	10159400000	usd
CY2022Q4	us-gaap	Assets Assets	8021400000	usd
CY2023Q4	abg	Floor Plan Notes Payable Trade FloorPlanNotesPayableTrade	195100000	usd
CY2022Q4	abg	Floor Plan Notes Payable Trade FloorPlanNotesPayableTrade	51000000.0	usd
CY2023Q4	abg	Floor Plan Notes Payable Non Trade FloorPlanNotesPayableNonTrade	1590600000	usd
CY2022Q4	abg	Floor Plan Notes Payable Non Trade FloorPlanNotesPayableNonTrade	0	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	84900000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	84500000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	26200000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	23600000	usd
CY2023Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	748100000	usd
CY2022Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	645000000.0	usd
CY2023Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	228600000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	218900000	usd
CY2023Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	2100000	usd
CY2022Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	10500000	usd
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	2875700000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	1033400000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	3121200000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	3216800000	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	222100000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	218400000	usd
CY2023Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	508100000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	495000000.0	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	136400000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	100700000	usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	51700000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	53500000	usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000	shares
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	43593809	shares
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	400000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	400000	usd
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1288400000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1281400000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2961500000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2610100000	usd
CY2023Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	22018537	shares
CY2022Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	22024479	shares
CY2023Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	1067300000	usd
CY2022Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	1063000000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	61100000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	74400000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	3244100000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	2903500000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	10159400000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	8021400000	usd
CY2023	abg	Revenue Finance And Insurance RevenueFinanceAndInsurance	676200000	usd
CY2022	abg	Revenue Finance And Insurance RevenueFinanceAndInsurance	797000000.0	usd
CY2021	abg	Revenue Finance And Insurance RevenueFinanceAndInsurance	405100000	usd
CY2023	us-gaap	Revenues Revenues	14802700000	usd
CY2022	us-gaap	Revenues Revenues	15433800000	usd
CY2021	us-gaap	Revenues Revenues	9837700000	usd
CY2023	abg	New Vehicle Cost Of Sales NewVehicleCostOfSales	6927800000	usd
CY2022	abg	New Vehicle Cost Of Sales NewVehicleCostOfSales	6521600000	usd
CY2023	abg	Used Vehicle Cost Of Sales UsedVehicleCostOfSales	4150200000	usd
CY2022	abg	Used Vehicle Cost Of Sales UsedVehicleCostOfSales	4843800000	usd
CY2023	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	931000000.0	usd
CY2022	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	921600000	usd
CY2023	abg	Finance And Insurance Expense FinanceAndInsuranceExpense	37900000	usd
CY2022	abg	Finance And Insurance Expense FinanceAndInsuranceExpense	46300000	usd
CY2021	abg	Finance And Insurance Expense FinanceAndInsuranceExpense	3600000	usd
CY2023	us-gaap	Cost Of Revenue CostOfRevenue	12046900000	usd
CY2022	us-gaap	Cost Of Revenue CostOfRevenue	12333300000	usd
CY2021	us-gaap	Cost Of Revenue CostOfRevenue	7935500000	usd
CY2023	us-gaap	Gross Profit GrossProfit	2755800000	usd
CY2022	us-gaap	Gross Profit GrossProfit	3100600000	usd
CY2021	us-gaap	Gross Profit GrossProfit	1902200000	usd
CY2023	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1617400000	usd
CY2022	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1763400000	usd
CY2021	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1073900000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	67700000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	69000000.0	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	41900000	usd
CY2023	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	117200000	usd
CY2022	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	0	usd
CY2021	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	0	usd
CY2023	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	0	usd
CY2022	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	4400000	usd
CY2021	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	5400000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	953500000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	1272600000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	791800000	usd
CY2023	abg	Floor Plan Interest Expense FloorPlanInterestExpense	9600000	usd
CY2022	abg	Floor Plan Interest Expense FloorPlanInterestExpense	8400000	usd
CY2021	abg	Floor Plan Interest Expense FloorPlanInterestExpense	8200000	usd
CY2023	us-gaap	Interest Expense Other InterestExpenseOther	156100000	usd
CY2022	us-gaap	Interest Expense Other InterestExpenseOther	152200000	usd
CY2021	us-gaap	Interest Expense Other InterestExpenseOther	93900000	usd
CY2023	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	13500000	usd
CY2022	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	207100000	usd
CY2021	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	8000000.0	usd
CY2023	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-152200000	usd
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	46500000	usd
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-94100000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	801300000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1319100000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	697700000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	321800000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	165300000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	532400000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20900000	shares
CY2023	us-gaap	Net Income Loss NetIncomeLoss	602500000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-22600000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	103300000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	5200000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-4000000.0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	200000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	589100000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1072200000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	537300000	usd
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	905500000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	532400000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	200000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	1600000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	4700000	usd
CY2023	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	1900000	usd
CY2022	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-4600000	usd
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	800000	usd
CY2023	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-58900000	usd
CY2022	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-17000000.0	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	537300000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	16200000	usd
CY2021	abg	Proceeds From Issuance Of Common Stock Secondary Offering Value ProceedsFromIssuanceOfCommonStockSecondaryOfferingValue	666900000	usd
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	10400000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2115500000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	997300000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	25100000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	78100000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-800000	usd
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-3200000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1072200000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	20600000	usd
CY2022	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	295600000	usd
CY2022	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	9200000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2903500000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	602500000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	5100000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-17500000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-1100000	usd
CY2023	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	4100000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	589100000	usd
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	23500000	usd
CY2023	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	260600000	usd
CY2023	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	11400000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3244100000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	602500000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	997300000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	532400000	usd
CY2023	us-gaap	Depreciation And Amortization DepreciationAndAmortization	67700000	usd
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	69000000.0	usd
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	41900000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	23500000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	20600000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	16200000	usd
CY2023	abg	Deferred Income Tax Expense Benefit Continuing Operations And Discontinued Operations DeferredIncomeTaxExpenseBenefitContinuingOperationsAndDiscontinuedOperations	39700000	usd
CY2022	abg	Deferred Income Tax Expense Benefit Continuing Operations And Discontinued Operations DeferredIncomeTaxExpenseBenefitContinuingOperationsAndDiscontinuedOperations	148500000	usd
CY2021	abg	Deferred Income Tax Expense Benefit Continuing Operations And Discontinued Operations DeferredIncomeTaxExpenseBenefitContinuingOperationsAndDiscontinuedOperations	31200000	usd
CY2023	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	117200000	usd
CY2022	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	0	usd
CY2021	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	0	usd
CY2023	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	2100000	usd
CY2022	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-14100000	usd
CY2021	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	1000000.0	usd
CY2023	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	34800000	usd
CY2022	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	14700000	usd
CY2021	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	20900000	usd
CY2023	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	13500000	usd
CY2022	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	207100000	usd
CY2021	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	8000000.0	usd
CY2023	abg	Changein Operating Lease Rightof Use Asset ChangeinOperatingLeaseRightofUseAsset	26800000	usd
CY2022	abg	Changein Operating Lease Rightof Use Asset ChangeinOperatingLeaseRightofUseAsset	25300000	usd
CY2021	abg	Changein Operating Lease Rightof Use Asset ChangeinOperatingLeaseRightofUseAsset	22300000	usd
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	48500000	usd
CY2023	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	54600000	usd
CY2021	us-gaap	Proceeds From Sale Of Equity Securities Fv Ni ProceedsFromSaleOfEquitySecuritiesFvNi	400000	usd
CY2023	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	16300000	usd
CY2022	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	usd
CY2021	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	21500000	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-47600000	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-35300000	usd
CY2023	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	144500000	usd
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-6900000	usd
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-670500000	usd
CY2023	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	564600000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	353700000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	227100000	usd
CY2023	abg	Increase Decrease In Floor Plan Notes Payable Trade IncreaseDecreaseInFloorPlanNotesPayableTrade	144100000	usd
CY2022	abg	Increase Decrease In Floor Plan Notes Payable Trade IncreaseDecreaseInFloorPlanNotesPayableTrade	13800000	usd
CY2021	abg	Increase Decrease In Floor Plan Notes Payable Trade IncreaseDecreaseInFloorPlanNotesPayableTrade	-27600000	usd
CY2023	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-22800000	usd
CY2022	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-42900000	usd
CY2021	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-3600000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	119500000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-69800000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	39200000	usd
CY2023	abg	Operating Lease Liability Operating Activities OperatingLeaseLiabilityOperatingActivities	26700000	usd
CY2022	abg	Operating Lease Liability Operating Activities OperatingLeaseLiabilityOperatingActivities	25400000	usd
CY2021	abg	Operating Lease Liability Operating Activities OperatingLeaseLiabilityOperatingActivities	20600000	usd
CY2023	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	18800000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	36300000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	13200000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	313000000.0	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	696000000.0	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1163700000	usd
CY2023	abg	Payments To Acquire Property Plant And Equipment Excluding Real Estate PaymentsToAcquirePropertyPlantAndEquipmentExcludingRealEstate	142300000	usd
CY2022	abg	Payments To Acquire Property Plant And Equipment Excluding Real Estate PaymentsToAcquirePropertyPlantAndEquipmentExcludingRealEstate	94600000	usd
CY2021	abg	Payments To Acquire Property Plant And Equipment Excluding Real Estate PaymentsToAcquirePropertyPlantAndEquipmentExcludingRealEstate	74200000	usd
CY2023	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	0	usd
CY2022	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	13300000	usd
CY2021	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	7800000	usd
CY2023	abg	Payments To Acquire Previously Leased Real Estate PaymentsToAcquirePreviouslyLeasedRealEstate	0	usd
CY2022	abg	Payments To Acquire Previously Leased Real Estate PaymentsToAcquirePreviouslyLeasedRealEstate	0	usd
CY2021	abg	Payments To Acquire Previously Leased Real Estate PaymentsToAcquirePreviouslyLeasedRealEstate	217100000	usd
CY2023	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1500000000	usd
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	5000000.0	usd
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	3660400000	usd
CY2023	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	30700000	usd
CY2022	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	701200000	usd
CY2021	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	21300000	usd
CY2023	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	195200000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	202200000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1100000	usd
CY2023	us-gaap	Payments To Acquire Equity Securities Fv Ni PaymentsToAcquireEquitySecuritiesFvNi	0	usd
CY2022	us-gaap	Payments To Acquire Equity Securities Fv Ni PaymentsToAcquireEquitySecuritiesFvNi	41400000	usd
CY2021	us-gaap	Payments To Acquire Equity Securities Fv Ni PaymentsToAcquireEquitySecuritiesFvNi	400000	usd
CY2023	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	60300000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	69700000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	800000	usd
CY2023	us-gaap	Proceeds From Sale Of Equity Securities Fv Ni ProceedsFromSaleOfEquitySecuritiesFvNi	51800000	usd
CY2022	us-gaap	Proceeds From Sale Of Equity Securities Fv Ni ProceedsFromSaleOfEquitySecuritiesFvNi	50300000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1678400000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	464700000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3917000000	usd
CY2023	abg	Proceeds From Floor Plan Borrowings Non Trade ProceedsFromFloorPlanBorrowingsNonTrade	8385800000	usd
CY2022	abg	Proceeds From Floor Plan Borrowings Non Trade ProceedsFromFloorPlanBorrowingsNonTrade	7406500000	usd
CY2021	abg	Proceeds From Floor Plan Borrowings Non Trade ProceedsFromFloorPlanBorrowingsNonTrade	5042800000	usd
CY2023	abg	Floor Plan Borrowings Acquisitions FloorPlanBorrowingsAcquisitions	256100000	usd
CY2022	abg	Floor Plan Borrowings Acquisitions FloorPlanBorrowingsAcquisitions	0	usd
CY2021	abg	Floor Plan Borrowings Acquisitions FloorPlanBorrowingsAcquisitions	214500000	usd
CY2023	abg	Repayments Of Floor Plan Payables Non Trade RepaymentsOfFloorPlanPayablesNonTrade	7059800000	usd
CY2022	abg	Repayments Of Floor Plan Payables Non Trade RepaymentsOfFloorPlanPayablesNonTrade	7891600000	usd
CY2021	abg	Repayments Of Floor Plan Payables Non Trade RepaymentsOfFloorPlanPayablesNonTrade	5357500000	usd
CY2023	abg	Repayments Of Floor Plan Payables Non Trade Divestitures RepaymentsOfFloorPlanPayablesNonTradeDivestitures	0	usd
CY2022	abg	Repayments Of Floor Plan Payables Non Trade Divestitures RepaymentsOfFloorPlanPayablesNonTradeDivestitures	48400000	usd
CY2021	abg	Repayments Of Floor Plan Payables Non Trade Divestitures RepaymentsOfFloorPlanPayablesNonTradeDivestitures	800000	usd
CY2023	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	usd
CY2022	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2274000000	usd
CY2023	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	126000000.0	usd
CY2022	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	106200000	usd
CY2021	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	41500000	usd
CY2023	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	329000000.0	usd
CY2022	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	330000000.0	usd
CY2021	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	439000000.0	usd
CY2023	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	329000000.0	usd
CY2022	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	499000000.0	usd
CY2021	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	270000000.0	usd
CY2023	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1400000	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	666900000	usd
CY2023	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1200000	usd
CY2022	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	400000	usd
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	26200000	usd
CY2023	abg	Purchasesof Treasury Stock PurchasesofTreasuryStock	267700000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	10400000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1104300000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2930800000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-189600000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	56400000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	177500000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	235300000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	178900000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1400000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	45700000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	235300000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	178900000	usd
CY2023Q4	abg	Number Of Franchises NumberOfFranchises	208	franchise
CY2023Q4	abg	Number Of Dealership Locations NumberOfDealershipLocations	158	dealership_location
CY2023Q4	abg	Number Of Vehicle Brands NumberOfVehicleBrands	31	vehiclebrands
CY2023Q4	abg	Number Of Collision Repair Centers NumberOfCollisionRepairCenters	37	collisionrepaircenters
CY2023Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	16	states
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	reportablesegment
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:9pt;margin-top:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Use of Estimates</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-indent:15.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities as of the date of the financial statements, and the reported amounts of revenues and expenses during the periods presented. Actual results could differ materially from these estimates. Estimates and assumptions are reviewed quarterly, and the effects of any revisions are reflected in the consolidated financial statements in the period they are determined to be necessary. Estimates made in the accompanying consolidated financial statements include, but are not limited to, those relating to inventory valuation reserves, reserves for chargebacks against revenue recognized from the sale of finance and insurance products, reserves for self-insurance programs, and certain assumptions related to goodwill and dealership franchise rights intangible assets.</span></div>
CY2023Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	3500000	usd
CY2023	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	1100000	usd
CY2022	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	usd
CY2021	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	usd
CY2023	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1316167	shares
CY2022	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1635030	shares
CY2023	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	1370371	shares
CY2022	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	1580826	shares
CY2021	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2021	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	0	shares
CY2023Q2	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	250000000	usd
CY2023Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	202600000	usd
CY2023	us-gaap	Advertising Expense AdvertisingExpense	47500000	usd
CY2022	us-gaap	Advertising Expense AdvertisingExpense	50100000	usd
CY2021	us-gaap	Advertising Expense AdvertisingExpense	30700000	usd
CY2023	abg	Advertising Credits And Volume Discounts AdvertisingCreditsAndVolumeDiscounts	36500000	usd
CY2022	abg	Advertising Credits And Volume Discounts AdvertisingCreditsAndVolumeDiscounts	35500000	usd
CY2021	abg	Advertising Credits And Volume Discounts AdvertisingCreditsAndVolumeDiscounts	22400000	usd
CY2023	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-bottom:9pt;margin-top:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Business and Credit Concentration Risk</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-indent:15.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Financial instruments, which potentially subject us to a concentration of credit risk, consist principally of cash deposits and investments. We maintain cash balances at financial institutions with strong credit ratings. Generally, amounts maintained with these financial institutions are in excess of FDIC insurance limits. In addition, we limit our exposure through the kind, quality and concentration of these investments. As of December 31, 2023, the Company had total investments of $332.9 million.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-indent:15.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We have substantial debt service obligations. As of December 31, 2023, we had total debt of $3.23 billion, which excludes floor plan notes payable, debt issuance costs, and the debt premium on the 4.5% Senior Notes (the "4.5% Notes") and 4.75% Senior Notes (the "4.75% Notes") due 2028 and 2030, respectively. In addition, we and our subsidiaries have the ability to obtain additional debt from time to time to finance acquisitions, real property purchases, capital expenditures, share repurchases or for other purposes, although such borrowings are subject to the restrictions contained in the fourth amended and restated senior secured credit agreement with Bank of America, N.A. ("Bank of America"), as administrative agent, and the other lenders party thereto (the "2023 Senior Credit Facility"), the indentures governing our 4.5% Notes, 4.625% Notes, 4.75% Notes and 5.0% Notes (the "Indentures"), and our other debt instruments. We will have substantial debt service obligations, consisting of required cash payments of principal and interest, for the foreseeable future. </span></div><div style="margin-bottom:9pt;margin-top:9pt;text-indent:15.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We are subject to operating and financial restrictions and covenants in certain of our leases and in our debt instruments, including the 2023 Senior Credit Facility, the Indentures, and the credit agreements covering our mortgage obligations. These agreements contain restrictions on, among other things, our ability to incur additional indebtedness, to create liens or other encumbrances, and to make certain payments (including dividends and repurchases of our shares and investments). These agreements may also require us to maintain compliance with certain financial and other ratios. Our failure to comply with any of these covenants in the future would constitute a default under the relevant agreement, which would, depending on the relevant agreement, (i) entitle the creditors under such agreement to terminate our ability to borrow under the relevant agreement and accelerate our obligations to repay outstanding borrowings; (ii) require us to apply our available cash to repay these borrowings; (iii) entitle the creditors under such agreement to foreclose on the property securing the relevant indebtedness; and/or (iv) prevent us from making debt service payments on certain of our other indebtedness, any of which would have a material adverse effect on our business, financial condition or results of operations. In many cases, a default under one of our debt or mortgage agreements could trigger cross-default provisions in one or more of our other debt or mortgages.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-indent:15.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">A number of our dealerships are located on properties that we lease. Each of the leases governing such properties has certain covenants with which we must comply. If we fail to comply with the covenants under our leases, the respective landlords could terminate the leases and seek damages from us.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-indent:15.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Concentrations of credit risk with respect to contracts-in-transit and accounts receivable are limited primarily to automotive manufacturers and financial institutions. Credit risk arising from receivables with commercial customers is minimal due to the large number of customers comprising our customer base.</span></div><div style="margin-bottom:9pt;margin-top:6pt;text-indent:15.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">A significant portion of our new vehicle sales are derived from a limited number of automotive manufacturers. For the year ended December 31, 2023, manufacturers representing 5% or more of our revenues from new vehicle sales were as follows:</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:120%"> </span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:83.987%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.530%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:13.083%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Manufacturer (Vehicle Brands):</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">% of Total<br/>New Vehicle<br/>Revenues</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:top"><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Toyota Motor Sales, U.S.A., Inc. </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:100%">(Toyota and Lexus)</span></div></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">27 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:top"><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stellantis N.V. (</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:100%">Chrysler, Dodge, Jeep, Ram and Fiat</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">)</span></div></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">12 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:top"><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">American Honda Motor Co., Inc. </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:100%">(Honda and Acura)</span></div></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">12 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:top"><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Ford Motor Company </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:100%">(Ford and Lincoln)</span></div></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">11 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:top"><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Mercedes-Benz USA, LLC (</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:100%">Mercedes-Benz and Sprinter</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">)</span></div></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">9 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:top"><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">General Motors Company (</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:100%">Chevrolet, Buick and GMC)</span></div></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">6 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:top"><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Hyundai Motor North America (</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:100%">Hyundai and Genesis</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">)</span></div></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr></table></div><div style="margin-bottom:9pt;margin-top:6pt;text-indent:15.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">No other manufacturers individually accounted for more than 5% of our total new vehicle revenue for the year ended December 31, 2023.</span></div>
CY2023Q4	us-gaap	Investments Investments	332900000	usd
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	3230000000	usd
CY2023	abg	Entity Wide Revenues Major Brands Disclosure Percentage Threshold EntityWideRevenuesMajorBrandsDisclosurePercentageThreshold	0.05
CY2023	abg	Entity Wide Revenues Major Brands Disclosure Percentage Threshold EntityWideRevenuesMajorBrandsDisclosurePercentageThreshold	0.05
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14802700000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	15433800000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	9837700000	usd
CY2021Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	27200000	usd
CY2022	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	25800000	usd
CY2022	abg	Contract With Customer Asset Amortization Of Costs To Obtain A Contract With A Customer ContractWithCustomerAssetAmortizationOfCostsToObtainAContractWithACustomer	4600000	usd
CY2022	abg	Contract With Customer Costs To Obtain Contract ContractWithCustomerCostsToObtainContract	40300000	usd
CY2022	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	29400000	usd
CY2022Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	66600000	usd
CY2023	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	29400000	usd
CY2023	abg	Contract With Customer Asset Amortization Of Costs To Obtain A Contract With A Customer ContractWithCustomerAssetAmortizationOfCostsToObtainAContractWithACustomer	12200000	usd
CY2023	abg	Contract With Customer Costs To Obtain Contract ContractWithCustomerCostsToObtainContract	43300000	usd
CY2023	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	34300000	usd
CY2023Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	102700000	usd
CY2023Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	53800000	usd
CY2023Q4	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	48900000	usd
CY2023Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	736700000	usd
CY2022Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	713900000	usd
CY2023	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	4100000	usd
CY2023	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	13500000	usd
CY2022	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	207100000	usd
CY2023Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	228600000	usd
CY2022Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	174100000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2600000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2200000	usd
CY2023Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	226100000	usd
CY2022Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	171900000	usd
CY2023Q4	us-gaap	Inventory Net InventoryNet	1768300000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	959200000	usd
CY2023Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	8800000	usd
CY2022Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	10700000	usd
CY2023Q4	us-gaap	Disposal Group Including Discontinued Operation Inventory1 DisposalGroupIncludingDiscontinuedOperationInventory1	84500000	usd
CY2022Q4	us-gaap	Disposal Group Including Discontinued Operation Inventory1 DisposalGroupIncludingDiscontinuedOperationInventory1	3400000	usd
CY2023Q4	abg	Disposal Group Including Discontinued Operation Loaners DisposalGroupIncludingDiscontinuedOperationLoaners	4500000	usd
CY2022Q4	abg	Disposal Group Including Discontinued Operation Loaners DisposalGroupIncludingDiscontinuedOperationLoaners	900000	usd
CY2023Q4	us-gaap	Disposal Group Including Discontinued Operation Property Plant And Equipment DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment	136600000	usd
CY2022Q4	us-gaap	Disposal Group Including Discontinued Operation Property Plant And Equipment DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment	24000000.0	usd
CY2023Q4	abg	Disposal Group Including Discontinued Operation Operating Lease Rou Assets DisposalGroupIncludingDiscontinuedOperationOperatingLeaseROUAssets	2100000	usd
CY2022Q4	abg	Disposal Group Including Discontinued Operation Operating Lease Rou Assets DisposalGroupIncludingDiscontinuedOperationOperatingLeaseROUAssets	0	usd
CY2023Q4	us-gaap	Disposal Group Including Discontinued Operation Goodwill1 DisposalGroupIncludingDiscontinuedOperationGoodwill1	26100000	usd
CY2022Q4	us-gaap	Disposal Group Including Discontinued Operation Goodwill1 DisposalGroupIncludingDiscontinuedOperationGoodwill1	900000	usd
CY2023Q4	us-gaap	Disposal Group Including Discontinued Operation Intangible Assets DisposalGroupIncludingDiscontinuedOperationIntangibleAssets	88500000	usd
CY2022Q4	us-gaap	Disposal Group Including Discontinued Operation Intangible Assets DisposalGroupIncludingDiscontinuedOperationIntangibleAssets	0	usd
CY2023Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	342200000	usd
CY2022Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	29100000	usd
CY2023Q4	abg	Disposal Group Including Discontinued Operation Floor Plan Notes Payable Non Trade DisposalGroupIncludingDiscontinuedOperationFloorPlanNotesPayableNonTrade	0	usd
CY2022Q4	abg	Disposal Group Including Discontinued Operation Floor Plan Notes Payable Non Trade DisposalGroupIncludingDiscontinuedOperationFloorPlanNotesPayableNonTrade	2800000	usd
CY2023Q4	abg	Disposal Group Including Discontinued Operation Loaners Liabilities DisposalGroupIncludingDiscontinuedOperationLoanersLiabilities	0	usd
CY2022Q4	abg	Disposal Group Including Discontinued Operation Loaners Liabilities DisposalGroupIncludingDiscontinuedOperationLoanersLiabilities	800000	usd
CY2023Q4	abg	Disposal Group Including Discontinued Operation Current Maturitiesof Longterm Debt DisposalGroupIncludingDiscontinuedOperationCurrentMaturitiesofLongtermDebt	0	usd
CY2022Q4	abg	Disposal Group Including Discontinued Operation Current Maturitiesof Longterm Debt DisposalGroupIncludingDiscontinuedOperationCurrentMaturitiesofLongtermDebt	600000	usd
CY2023Q4	abg	Disposal Group Including Discontinued Operation Operating Leases Current Maturities DisposalGroupIncludingDiscontinuedOperationOperatingLeasesCurrentMaturities	200000	usd
CY2022Q4	abg	Disposal Group Including Discontinued Operation Operating Leases Current Maturities DisposalGroupIncludingDiscontinuedOperationOperatingLeasesCurrentMaturities	0	usd
CY2023Q4	abg	Disposal Group Including Discontinued Operation Longterm Debt DisposalGroupIncludingDiscontinuedOperationLongtermDebt	0	usd
CY2022Q4	abg	Disposal Group Including Discontinued Operation Longterm Debt DisposalGroupIncludingDiscontinuedOperationLongtermDebt	6200000	usd
CY2023Q4	abg	Disposal Group Including Discontinued Operation Operating Lease Liabilities DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilities	1900000	usd
CY2022Q4	abg	Disposal Group Including Discontinued Operation Operating Lease Liabilities DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilities	0	usd
CY2023Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	2100000	usd
CY2022Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	10500000	usd
CY2023Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group AssetsHeldForSaleNotPartOfDisposalGroup	340100000	usd
CY2022Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group AssetsHeldForSaleNotPartOfDisposalGroup	18700000	usd
CY2023	abg	Number Of Franchise Sold NumberOfFranchiseSold	1	franchise
CY2023	abg	Number Of Dealership Locations Sold NumberOfDealershipLocationsSold	1	dealership_location
CY2023	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	13500000	usd
CY2022	abg	Number Of Franchise Sold NumberOfFranchiseSold	18	franchise
CY2022	abg	Number Of Dealership Locations Sold NumberOfDealershipLocationsSold	16	dealership_location
CY2023	abg	Numberof Collision Centers Sold NumberofCollisionCentersSold	3	collisioncenter
CY2022	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	207100000	usd
CY2023Q4	abg	Other Assets Current Service Loaner Vehicles OtherAssetsCurrentServiceLoanerVehicles	262600000	usd
CY2022Q4	abg	Other Assets Current Service Loaner Vehicles OtherAssetsCurrentServiceLoanerVehicles	178200000	usd
CY2023Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	53800000	usd
CY2022Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	40500000	usd
CY2023Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	41400000	usd
CY2022Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	43000000.0	usd
CY2023Q4	us-gaap	Prepaid Taxes PrepaidTaxes	18400000	usd
CY2022Q4	us-gaap	Prepaid Taxes PrepaidTaxes	5800000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss Current FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLossCurrent	5200000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss Current FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLossCurrent	12900000	usd
CY2023Q4	us-gaap	Deposits Assets Current DepositsAssetsCurrent	4500000	usd
CY2022Q4	us-gaap	Deposits Assets Current DepositsAssetsCurrent	4100000	usd
CY2023Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	3100000	usd
CY2022Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	3600000	usd
CY2023Q4	us-gaap	Other Assets Current OtherAssetsCurrent	388900000	usd
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	288100000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	331600000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	3500000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2200000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	332900000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	244200000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	500000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	4400000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	240400000	usd
CY2023	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	0	usd
CY2023Q4	us-gaap	Interest Receivable InterestReceivable	2500000	usd
CY2022Q4	us-gaap	Interest Receivable InterestReceivable	1300000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	6300000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	6200000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	116900000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	116900000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	52900000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	53400000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	5400000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	5500000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	181500000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	182000000.0	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	331600000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	332900000	usd
CY2023	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	500000	usd
CY2023	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	1500000	usd
CY2023	us-gaap	Equity Securities Fv Ni Realized Gain EquitySecuritiesFvNiRealizedGain	3700000	usd
CY2023	us-gaap	Equity Securities Fv Ni Realized Loss EquitySecuritiesFvNiRealizedLoss	900000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	100000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	2000000	usd
CY2022	us-gaap	Equity Securities Fv Ni Realized Gain EquitySecuritiesFvNiRealizedGain	10100000	usd
CY2022	us-gaap	Equity Securities Fv Ni Realized Loss EquitySecuritiesFvNiRealizedLoss	3600000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Gain Loss DebtSecuritiesAvailableForSaleGainLoss	0	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	51100000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	700000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	102500000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1600000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	153600000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	2200000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	145700000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	2000000.0	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	6800000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	500000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	152600000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	2500000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	2711700000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	2279500000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	396100000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	338500000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	2315700000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	1941000000	usd
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	8400000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	8100000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	67700000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	69000000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	41900000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	2271700000	usd
CY2022	abg	Goodwill Reclassified From Assets Held For Sale GoodwillReclassifiedFromAssetsHeldForSale	118500000	usd
CY2022	abg	Goodwill Acquired During Period Measurement Period Adjustments GoodwillAcquiredDuringPeriodMeasurementPeriodAdjustments	510700000	usd
CY2022	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	95200000	usd
CY2022	abg	Goodwill Reclassified To Assets Held For Sale GoodwillReclassifiedToAssetsHeldForSale	900000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	1783400000	usd
CY2023	abg	Goodwill Reclassified From Assets Held For Sale GoodwillReclassifiedFromAssetsHeldForSale	900000	usd
CY2023	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	240800000	usd
CY2023	abg	Goodwill Acquired During Period Measurement Period Adjustments GoodwillAcquiredDuringPeriodMeasurementPeriodAdjustments	900000	usd
CY2023	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	14900000	usd
CY2023	abg	Goodwill Reclassified To Assets Held For Sale GoodwillReclassifiedToAssetsHeldForSale	300000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	2009000000	usd
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	537700000	usd
CY2023Q4	us-gaap	Asset Impairment Charges AssetImpairmentCharges	44100000	usd
CY2023Q4	abg	Floor Plan Notes Payable Trade Gross FloorPlanNotesPayableTradeGross	245600000	usd
CY2022Q4	abg	Floor Plan Notes Payable Trade Gross FloorPlanNotesPayableTradeGross	65100000	usd
CY2023Q4	abg	Floor Plan Notes Payable Trade Offsets FloorPlanNotesPayableTradeOffsets	50500000	usd
CY2022Q4	abg	Floor Plan Notes Payable Trade Offsets FloorPlanNotesPayableTradeOffsets	14200000	usd
CY2023Q4	abg	Floor Plan Notes Payable Trade FloorPlanNotesPayableTrade	195100000	usd
CY2022Q4	abg	Floor Plan Notes Payable Trade FloorPlanNotesPayableTrade	51000000.0	usd
CY2023Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	56800000	usd
CY2023Q4	abg	Floor Plan Notes Payable Non Trade New Gross FloorPlanNotesPayableNonTradeNewGross	1328100000	usd
CY2022Q4	abg	Floor Plan Notes Payable Non Trade New Gross FloorPlanNotesPayableNonTradeNewGross	613600000	usd
CY2023Q4	abg	Floor Plan Notes Payable Non Trade Used Gross FloorPlanNotesPayableNonTradeUsedGross	307100000	usd
CY2022Q4	abg	Floor Plan Notes Payable Non Trade Used Gross FloorPlanNotesPayableNonTradeUsedGross	0	usd
CY2023Q4	abg	Floor Plan Notes Payable Non Trade Offsets FloorPlanNotesPayableNonTradeOffsets	44700000	usd
CY2022Q4	abg	Floor Plan Notes Payable Non Trade Offsets FloorPlanNotesPayableNonTradeOffsets	613600000	usd
CY2023Q4	abg	Floor Plan Notes Payable Non Trade FloorPlanNotesPayableNonTrade	1590600000	usd
CY2022Q4	abg	Floor Plan Notes Payable Non Trade FloorPlanNotesPayableNonTrade	0	usd
CY2022Q4	abg	Floor Plan Notes Payable Non Trade Liabilities Associatedwith Assets Heldfor Sale FloorPlanNotesPayableNonTradeLiabilitiesAssociatedwithAssetsHeldforSale	2800000	usd
CY2022Q4	abg	Floor Plan Notes Payable Non Trade Offsets FloorPlanNotesPayableNonTradeOffsets	613600000	usd
CY2023Q4	abg	Floor Plan Notes Payable Offset Account Additional Amount FloorPlanNotesPayableOffsetAccountAdditionalAmount	164000000	usd
CY2022Q2	abg	Amount Available Under Revolving Loan Credit Facility Transferred AmountAvailableUnderRevolvingLoanCreditFacilityTransferred	389000000	usd
CY2023Q1	abg	Amount Available Under Revolving Loan Credit Facility Transferred AmountAvailableUnderRevolvingLoanCreditFacilityTransferred	389000000	usd
CY2023Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	155600000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	147400000	usd
CY2023Q4	abg	Notes Payable Loaner Vehicle Current NotesPayableLoanerVehicleCurrent	239100000	usd
CY2022Q4	abg	Notes Payable Loaner Vehicle Current NotesPayableLoanerVehicleCurrent	94500000	usd
CY2023Q4	abg	Taxes Payable Current Excluding Income Taxes Payable TaxesPayableCurrentExcludingIncomeTaxesPayable	74900000	usd
CY2022Q4	abg	Taxes Payable Current Excluding Income Taxes Payable TaxesPayableCurrentExcludingIncomeTaxesPayable	91800000	usd
CY2022Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	89000000.0	usd
CY2023Q4	us-gaap	Interest Payable Current InterestPayableCurrent	46600000	usd
CY2022Q4	us-gaap	Interest Payable Current InterestPayableCurrent	33000000.0	usd
CY2023Q4	us-gaap	Contract With Customer Refund Liability Current ContractWithCustomerRefundLiabilityCurrent	30200000	usd
CY2022Q4	us-gaap	Contract With Customer Refund Liability Current ContractWithCustomerRefundLiabilityCurrent	23500000	usd
CY2023Q4	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	28400000	usd
CY2022Q4	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	39200000	usd
CY2023Q4	abg	Accrued Finance And Insurance Chargebacks Current AccruedFinanceAndInsuranceChargebacksCurrent	24700000	usd
CY2022Q4	abg	Accrued Finance And Insurance Chargebacks Current AccruedFinanceAndInsuranceChargebacksCurrent	29100000	usd
CY2023Q4	abg	Accrued Licenses And Regulatory Fees Current AccruedLicensesAndRegulatoryFeesCurrent	16700000	usd
CY2022Q4	abg	Accrued Licenses And Regulatory Fees Current AccruedLicensesAndRegulatoryFeesCurrent	9900000	usd
CY2023Q4	abg	Deferred Tax Liabilities Tax Deferred Expense Reserves And Accruals Unearned Premiums DeferredTaxLiabilitiesTaxDeferredExpenseReservesAndAccrualsUnearnedPremiums	14100000	usd
CY2022Q4	abg	Deferred Tax Liabilities Tax Deferred Expense Reserves And Accruals Unearned Premiums DeferredTaxLiabilitiesTaxDeferredExpenseReservesAndAccrualsUnearnedPremiums	13600000	usd
CY2023Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	7300000	usd
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	7000000.0	usd
CY2023Q4	us-gaap	Accrued Advertising Current And Noncurrent AccruedAdvertisingCurrentAndNoncurrent	6900000	usd
CY2022Q4	us-gaap	Accrued Advertising Current And Noncurrent AccruedAdvertisingCurrentAndNoncurrent	4300000	usd
CY2023Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	6400000	usd
CY2022Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	21300000	usd
CY2023Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	40300000	usd
CY2022Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	41500000	usd
CY2023Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	748100000	usd
CY2022Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	645000000.0	usd
CY2022Q4	abg	Disposal Group Including Discontinued Operation Loaners Liabilities DisposalGroupIncludingDiscontinuedOperationLoanersLiabilities	800000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	8400000	usd
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	8400000	usd
CY2023Q4	abg	Long Term Debt And Lease Obligations Current And Noncurrent LongTermDebtAndLeaseObligationsCurrentAndNoncurrent	3230100000	usd
CY2022Q4	abg	Long Term Debt And Lease Obligations Current And Noncurrent LongTermDebtAndLeaseObligationsCurrentAndNoncurrent	3329200000	usd
CY2023Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	25900000	usd
CY2022Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	30400000	usd
CY2023Q4	abg	Long Term Debt And Lease Obligations Current And Noncurrent Including Unamortized Premium Discount LongTermDebtAndLeaseObligationsCurrentAndNoncurrentIncludingUnamortizedPremiumDiscount	3206200000	usd
CY2022Q4	abg	Long Term Debt And Lease Obligations Current And Noncurrent Including Unamortized Premium Discount LongTermDebtAndLeaseObligationsCurrentAndNoncurrentIncludingUnamortizedPremiumDiscount	3301200000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	84900000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	84500000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	3121200000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	3216800000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	85700000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	134100000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	553000000.0	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	12400000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	464600000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	1980200000	usd
CY2023Q4	abg	Long Term Debt And Lease Obligations1 LongTermDebtAndLeaseObligations1	3230100000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	4100000	usd
CY2023	abg	Debt Securities Available For Sale Loss Reclassified From Accumulated Oci Into Income Effective Portion DebtSecuritiesAvailableForSaleLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	-1100000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-6000000.0	usd
CY2022	abg	Debt Securities Available For Sale Loss Reclassified From Accumulated Oci Into Income Effective Portion DebtSecuritiesAvailableForSaleLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	-1900000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	0	usd
CY2021	abg	Debt Securities Available For Sale Loss Reclassified From Accumulated Oci Into Income Effective Portion DebtSecuritiesAvailableForSaleLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	0	usd
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	1700000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.002
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	1600000	usd
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	128900000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	142000000.0	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	113900000	usd
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	30100000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	30800000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	20800000	usd
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	159000000.0	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	172800000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	134700000	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	33800000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	130700000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	24800000	usd
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	6000000.0	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	18300000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	5800000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	39800000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	149000000.0	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	30600000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	198800000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	321800000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	165300000	usd
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	168300000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	277000000.0	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	146500000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	29800000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.037
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	42700000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.032
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	21000000.0	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.030
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.001
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	600000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.001
CY2023	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-1000000.0	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.001
CY2022	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	500000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.001
CY2021	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-2800000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.004
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	198800000	usd
CY2023	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.248
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	321800000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.244
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	165300000	usd
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.237
CY2023Q4	abg	Deferred Tax Assets Tax Deferred Expense Deferred Revenue DeferredTaxAssetsTaxDeferredExpenseDeferredRevenue	38000000.0	usd
CY2022Q4	abg	Deferred Tax Assets Tax Deferred Expense Deferred Revenue DeferredTaxAssetsTaxDeferredExpenseDeferredRevenue	35700000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	12100000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	13200000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	2900000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	6600000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	3700000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	3100000	usd
CY2023Q4	abg	Deferred Tax Assets Rightof Use Assets DeferredTaxAssetsRightofUseAssets	61500000	usd
CY2022Q4	abg	Deferred Tax Assets Rightof Use Assets DeferredTaxAssetsRightofUseAssets	59100000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	12900000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	9400000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	131200000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	127100000	usd
CY2023Q4	abg	Deferred Tax Liabilities Intangibleassetamortization DeferredTaxLiabilitiesIntangibleassetamortization	110800000	usd
CY2022Q4	abg	Deferred Tax Liabilities Intangibleassetamortization DeferredTaxLiabilitiesIntangibleassetamortization	91000000.0	usd
CY2023Q4	abg	Deferred Tax Liabilities Depreciation DeferredTaxLiabilitiesDepreciation	56900000	usd
CY2022Q4	abg	Deferred Tax Liabilities Depreciation DeferredTaxLiabilitiesDepreciation	52100000	usd
CY2023Q4	abg	Deferred Tax Liabilities Operating Lease Liabilities DeferredTaxLiabilitiesOperatingLeaseLiabilities	59900000	usd
CY2022Q4	abg	Deferred Tax Liabilities Operating Lease Liabilities DeferredTaxLiabilitiesOperatingLeaseLiabilities	57500000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	20000000.0	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	24000000.0	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	18300000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	0	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1600000	usd
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CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	267600000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	227800000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	136400000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	100700000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	usd
CY2023Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	11500000	usd
CY2023Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	63800000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	2200000	usd
CY2023Q4	us-gaap	Unearned Premiums UnearnedPremiums	21800000	usd
CY2022Q4	us-gaap	Unearned Premiums UnearnedPremiums	23100000	usd
CY2023Q4	abg	Accrued Finance And Insurance Chargebacks Noncurrent AccruedFinanceAndInsuranceChargebacksNoncurrent	24300000	usd
CY2022Q4	abg	Accrued Finance And Insurance Chargebacks Noncurrent AccruedFinanceAndInsuranceChargebacksNoncurrent	24900000	usd
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CY2022Q4	abg	Unclaimed Property UnclaimedProperty	5100000	usd
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CY2022Q4	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	500000	usd
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CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	53500000	usd
CY2023	us-gaap	Interest Paid Net InterestPaidNet	149300000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	147200000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	92200000	usd
CY2023	abg	Cash Paid During Period Related To Floor Plan Interest CashPaidDuringPeriodRelatedToFloorPlanInterest	4000000	usd
CY2022	abg	Cash Paid During Period Related To Floor Plan Interest CashPaidDuringPeriodRelatedToFloorPlanInterest	8400000	usd
CY2021	abg	Cash Paid During Period Related To Floor Plan Interest CashPaidDuringPeriodRelatedToFloorPlanInterest	8700000	usd
CY2023	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	191900000	usd
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	198400000	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	114200000	usd
CY2023	abg	Loaner Vehicles Amount Transferred From Other Current Assets To Inventory LoanerVehiclesAmountTransferredFromOtherCurrentAssetsToInventory	431200000	usd
CY2022	abg	Loaner Vehicles Amount Transferred From Other Current Assets To Inventory LoanerVehiclesAmountTransferredFromOtherCurrentAssetsToInventory	281400000	usd
CY2021	abg	Loaner Vehicles Amount Transferred From Other Current Assets To Inventory LoanerVehiclesAmountTransferredFromOtherCurrentAssetsToInventory	216300000	usd
CY2023Q4	abg	Operating Lease Asset Heldfor Sale OperatingLeaseAssetHeldforSale	2100000	usd
CY2022Q4	abg	Operating Lease Asset Heldfor Sale OperatingLeaseAssetHeldforSale	0	usd
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CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	235400000	usd
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	8400000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	8100000	usd
CY2023Q4	abg	Leases Rightof Use Asset LeasesRightofUseAsset	252300000	usd
CY2022Q4	abg	Leases Rightof Use Asset LeasesRightofUseAsset	243500000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	26200000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	23600000	usd
CY2023Q4	abg	Operating Lease Liability Heldfor Sale Current OperatingLeaseLiabilityHeldforSaleCurrent	200000	usd
CY2022Q4	abg	Operating Lease Liability Heldfor Sale Current OperatingLeaseLiabilityHeldforSaleCurrent	0	usd
CY2023Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	0	usd
CY2022Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	0	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	222100000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	218400000	usd
CY2023Q4	abg	Operating Lease Liability Heldfor Sale Noncurrent OperatingLeaseLiabilityHeldforSaleNoncurrent	1900000	usd
CY2022Q4	abg	Operating Lease Liability Heldfor Sale Noncurrent OperatingLeaseLiabilityHeldforSaleNoncurrent	0	usd
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	8400000	usd
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	8400000	usd
CY2023Q4	abg	Leases Liability LeasesLiability	258800000	usd
CY2022Q4	abg	Leases Liability LeasesLiability	250400000	usd
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P13Y2M12D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P14Y4M24D
CY2023Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P36Y8M12D
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P37Y8M12D
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.049
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.047
CY2023Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.044
CY2022Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.044
CY2023	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	400000	usd
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	400000	usd
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	36200000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	38100000	usd
CY2023	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3600000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	4300000	usd
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	1000000.0	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	2400000	usd
CY2023	us-gaap	Lease Cost LeaseCost	41300000	usd
CY2022	us-gaap	Lease Cost LeaseCost	45100000	usd
CY2023	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	400000	usd
CY2022	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	400000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	36200000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	38100000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	35000000.0	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	6200000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	35000000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	6200000	usd
CY2022	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	94600000	usd
CY2022Q4	us-gaap	Assets Assets	8021400000	usd
CY2023Q4	abg	Sharebased Compensation Arrangementby Sharebased Payment Award Numberof Instruments Providedfor Grant SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofInstrumentsProvidedforGrant	1500000	shares
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	400000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	38100000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	400000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	35500000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	400000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	28300000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	400000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	25000000.0	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	400000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	23100000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	15700000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	194700000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	17700000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	344600000	usd
CY2023Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	9400000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	94100000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	8400000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	250500000	usd
CY2023Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	0	usd
CY2023Q4	abg	Operating Lease Liability Including Held For Sale Current OperatingLeaseLiabilityIncludingHeldForSaleCurrent	26400000	usd
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	8400000	usd
CY2023Q4	abg	Operating Lease Liability Noncurrent1 OperatingLeaseLiabilityNoncurrent1	224100000	usd
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2023	us-gaap	Revenues Revenues	14802700000	usd
CY2023	us-gaap	Gross Profit GrossProfit	2755800000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	67700000	usd
CY2023	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1617400000	usd
CY2023	abg	Floor Plan Interest Expense FloorPlanInterestExpense	9600000	usd
CY2023	us-gaap	Interest Expense Other InterestExpenseOther	156100000	usd
CY2023	us-gaap	Interest Expense InterestExpense	165700000	usd
CY2023	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	142300000	usd
CY2023Q4	us-gaap	Assets Assets	10159400000	usd
CY2022	us-gaap	Revenues Revenues	15433800000	usd
CY2022	us-gaap	Gross Profit GrossProfit	3100600000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	69000000.0	usd
CY2022	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1763400000	usd
CY2022	abg	Floor Plan Interest Expense FloorPlanInterestExpense	8400000	usd
CY2022	us-gaap	Interest Expense Other InterestExpenseOther	152200000	usd
CY2022	us-gaap	Interest Expense InterestExpense	160600000	usd
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	1400000	shares
CY2023	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	23500000	usd
CY2023	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	5800000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	20600000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	5000000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	16200000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3900000	usd
CY2023Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	17800000	usd
CY2023	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y6M
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CY2023	abg	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Expected Future Recognition Year Three EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedExpectedFutureRecognitionYearThree	5500000	usd
CY2023	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.75
CY2023	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Amount DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount	22500	usd
CY2023	abg	Define Contribution Plan Minimum Age Requirement DefineContributionPlanMinimumAgeRequirement	P50Y
CY2023	abg	Defined Contribution Plan Employer Matching Contribution Employment Requirement Period For Matching Eligibility Minimum DefinedContributionPlanEmployerMatchingContributionEmploymentRequirementPeriodForMatchingEligibilityMinimum	P1Y
CY2023	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.50
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CY2023	abg	Defined Contribution Plan Employers Matching Contribution Vesting Period DefinedContributionPlanEmployersMatchingContributionVestingPeriod	P4Y
CY2023	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	16000000	usd
CY2022	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	18000000	usd
CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	5300000	usd
CY2023Q4	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
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CY2023Q4	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false

Files In Submission

Name	View Source	Status
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$ABG
ASBURY AUTOMOTIVE GROUP INC Stock $abg

2024 Q1 Form 10-K Financial Statement

#000114498024000076 Filed on February 29, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ABG ASBURY AUTOMOTIVE GROUP INC Stock $abg

2024 Q1 Form 10-K Financial Statement

#000114498024000076 Filed on February 29, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ABG
ASBURY AUTOMOTIVE GROUP INC Stock $abg