$KMX
CARMAX INC Stock $kmx

$kmx Overview Financials Valuation SEC Filings Company Website

2022 Q1 Form 10-K Financial Statement

#000117001022000017 Filed on April 14, 2022

Income Statement

Concept	2022 Q1	2022	2021 Q1
Revenue	$7.687B	$31.90B	$5.164B
YoY Change	48.84%	68.34%	4.07%
Cost Of Revenue	$6.976B	$28.61B	$4.523B
YoY Change	54.23%	72.67%	5.44%
Gross Profit	$711.0M	$3.288B	$641.4M
YoY Change	10.85%	38.18%	-4.68%
Gross Profit Margin	9.25%	10.31%	12.42%
Selling, General & Admin	$643.5M	$2.325B	$556.1M
YoY Change	15.72%	36.42%	14.72%
% of Gross Profit	90.51%	70.73%	86.7%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$72.37M	$273.2M	$61.70M
YoY Change	17.29%	12.81%	7.12%
% of Gross Profit	10.18%	8.31%	9.62%
Operating Expenses	$699.3M	$2.325B	$547.0M
YoY Change	27.84%	36.42%	12.85%
Operating Profit	$11.72M	$962.3M	$94.40M
YoY Change	-87.58%	42.63%	-49.82%
Interest Expense	$166.9M	$94.10M	$167.9M
YoY Change	-0.58%	9.19%	87.39%
% of Operating Profit	1424.29%	9.78%	177.86%
Other Income/Expense, Net		-$34.57M
YoY Change		317.74%
Pretax Income	$201.2M	$1.492B	$262.2M
YoY Change	-23.25%	54.61%	-5.21%
Income Tax	$41.41M	$341.0M	$52.30M
% Of Pretax Income	20.58%	22.85%	19.95%
Net Earnings	$159.8M	$1.151B	$209.9M
YoY Change	-23.85%	54.14%	-2.34%
Net Earnings / Revenue	2.08%	3.61%	4.06%
Basic Earnings Per Share		$7.09
Diluted Earnings Per Share	$975.3K	$6.97	$1.268M
COMMON SHARES
Basic Shares Outstanding	160.5M shares	162.4M shares	163.2M shares
Diluted Shares Outstanding		165.2M shares

Balance Sheet

Concept	2022 Q1	2022	2021 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$102.7M	$102.7M	$132.0M
YoY Change	-22.18%	-22.18%	127.59%
Cash & Equivalents	$102.7M	$102.7M	$132.3M
Short-Term Investments
Other Short-Term Assets	$212.9M	$761.0M	$91.83M
YoY Change	131.86%	29.43%	5.64%
Inventory	$5.125B	$5.125B	$3.157B
Prepaid Expenses
Receivables	$561.0M	$561.0M	$239.1M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$6.549B	$6.549B	$4.117B
YoY Change	59.09%	59.08%	12.37%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.209B	$3.746B	$3.056B
YoY Change	5.02%	7.44%	-0.44%
Goodwill	$141.3M		$653.0K
YoY Change	21532.16%
Intangibles	$206.5M
YoY Change
Long-Term Investments
YoY Change
Other Assets	$490.7M	$611.6M	$282.8M
YoY Change	73.5%	36.52%	9.3%
Total Long-Term Assets	$19.79B	$19.79B	$17.42B
YoY Change	13.57%	13.57%	0.04%
TOTAL ASSETS
Total Short-Term Assets	$6.549B	$6.549B	$4.117B
Total Long-Term Assets	$19.79B	$19.79B	$17.42B
Total Assets	$26.34B	$26.34B	$21.54B
YoY Change	22.27%	22.26%	2.18%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$937.7M	$937.7M	$799.3M
YoY Change	17.31%	17.36%	8.44%
Accrued Expenses	$533.3M	$567.2M	$415.5M
YoY Change	28.36%	29.79%	25.24%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$11.20M	$542.6M	$9.927M
YoY Change	12.85%	17.44%	7.31%
Total Short-Term Liabilities	$2.047B	$2.047B	$1.699B
YoY Change	20.54%	20.51%	10.68%
LONG-TERM LIABILITIES
Long-Term Debt	$18.32B	$18.32B	$14.74B
YoY Change	24.29%	24.29%	-1.88%
Other Long-Term Liabilities	$357.1M	$735.2M	$434.8M
YoY Change	-17.88%	-0.38%	10.4%
Total Long-Term Liabilities	$357.1M	$19.06B	$434.8M
YoY Change	-17.88%	23.11%	10.4%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.047B	$2.047B	$1.699B
Total Long-Term Liabilities	$357.1M	$19.06B	$434.8M
Total Liabilities	$21.10B	$21.10B	$17.18B
YoY Change	22.86%	22.86%	-0.79%
SHAREHOLDERS EQUITY
Retained Earnings	$3.524B		$2.888B
YoY Change	22.03%		16.05%
Common Stock	$80.53M		$81.59M
YoY Change	-1.3%		0.06%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$5.235B	$5.235B	$4.365B
YoY Change
Total Liabilities & Shareholders Equity	$26.34B	$26.34B	$21.54B
YoY Change	22.27%	22.26%	2.18%

Cashflow Statement

Concept	2022 Q1	2022	2021 Q1
OPERATING ACTIVITIES
Net Income	$159.8M	$1.151B	$209.9M
YoY Change	-23.85%	54.14%	-2.34%
Depreciation, Depletion And Amortization	$72.37M	$273.2M	$61.70M
YoY Change	17.29%	12.81%	7.12%
Cash From Operating Activities	-$466.8M	-$2.549B	-$200.6M
YoY Change	132.7%	-481.79%	69.0%
INVESTING ACTIVITIES
Capital Expenditures	-$81.63M	$308.5M	-$40.50M
YoY Change	101.56%	87.52%	-51.03%
Acquisitions		-$241.6M
YoY Change
Other Investing Activities	-$9.431M	-$215.2M	$34.50M
YoY Change	-127.34%	-691.24%	-168.86%
Cash From Investing Activities	-$91.06M	-$523.7M	-$6.100M
YoY Change	1392.82%	308.59%	-95.41%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$576.5M
YoY Change		150.71%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	596.9M	$3.105B	110.3M
YoY Change	441.18%	-832.25%	-60.31%
NET CHANGE
Cash From Operating Activities	-466.8M	-$2.549B	-200.6M
Cash From Investing Activities	-91.06M	-$523.7M	-6.100M
Cash From Financing Activities	596.9M	$3.105B	110.3M
Net Change In Cash	39.06M	$31.67M	-96.40M
YoY Change	-140.52%	-72.59%	-465.15%
FREE CASH FLOW
Cash From Operating Activities	-$466.8M	-$2.549B	-$200.6M
Capital Expenditures	-$81.63M	$308.5M	-$40.50M
Free Cash Flow	-$385.2M	-$2.858B	-$160.1M
YoY Change	140.58%	-667.93%	344.72%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0001170010
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--02-28
CY2022Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.50
CY2021Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.50
CY2022Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	350000000	shares
CY2021Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	350000000	shares
CY2022Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	161053983	shares
CY2021Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	163172333	shares
CY2022Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	161053983	shares
CY2021Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	163172333	shares
CY2022Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	433030000	USD
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	411150000	USD
CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-02-28
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	001-31420
CY2022	dei	Entity Registrant Name EntityRegistrantName	CARMAX, INC.
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	VA
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	54-1821055
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	12800 Tuckahoe Creek Parkway
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Richmond,
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	VA
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	23238
CY2022	dei	City Area Code CityAreaCode	804
CY2022	dei	Local Phone Number LocalPhoneNumber	747-0422
CY2022	dei	Security12b Title Security12bTitle	Common Stock
CY2022	dei	Trading Symbol TradingSymbol	KMX
CY2022	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2021Q3	dei	Entity Public Float EntityPublicFloat	20342890361	USD
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	160537858	shares
CY2022	dei	Auditor Name AuditorName	KPMG LLP
CY2022	dei	Auditor Location AuditorLocation	Richmond, VA
CY2022	dei	Auditor Firm AuditorFirmId	185
CY2022	us-gaap	Revenues Revenues	31900412000	USD
CY2021	us-gaap	Revenues Revenues	18950149000	USD
CY2020	us-gaap	Revenues Revenues	20319987000	USD
CY2022	us-gaap	Cost Of Revenue CostOfRevenue	28612870000	USD
CY2021	us-gaap	Cost Of Revenue CostOfRevenue	16571024000	USD
CY2020	us-gaap	Cost Of Revenue CostOfRevenue	17597647000	USD
CY2022	us-gaap	Gross Profit GrossProfit	3287542000	USD
CY2021	us-gaap	Gross Profit GrossProfit	2379125000	USD
CY2020	us-gaap	Gross Profit GrossProfit	2722340000	USD
CY2022	kmx	Net Income Loss From Financing NetIncomeLossFromFinancing	801507000	USD
CY2021	kmx	Net Income Loss From Financing NetIncomeLossFromFinancing	562810000	USD
CY2020	kmx	Net Income Loss From Financing NetIncomeLossFromFinancing	456030000	USD
CY2022	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	2325220000	USD
CY2021	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1704419000	USD
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1750168000	USD
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	211956000	USD
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	194356000	USD
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	189899000	USD
CY2022	us-gaap	Interest Expense InterestExpense	94095000	USD
CY2021	us-gaap	Interest Expense InterestExpense	86178000	USD
CY2020	us-gaap	Interest Expense InterestExpense	83007000	USD
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-34568000	USD
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-8275000	USD
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-5690000	USD
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1492346000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	965257000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1160986000	USD
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	341049000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	218338000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	272553000	USD
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1151297000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	746919000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	888433000	USD
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	162410000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	163183000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	164836000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	165176000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	165133000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	166820000	shares
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.09
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.58
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.39
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.97
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.52
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.33
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1151297000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	746919000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	888433000	USD
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-19661000	USD
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-28640000	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	50824000	USD
CY2022	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	52608000	USD
CY2021	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	2740000	USD
CY2020	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	-31237000	USD
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	72269000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	31380000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-82061000	USD
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1223566000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	778299000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	806372000	USD
CY2022Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	102716000	USD
CY2021Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	132319000	USD
CY2022Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	548099000	USD
CY2021Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	496415000	USD
CY2022Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	560984000	USD
CY2021Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	239070000	USD
CY2022Q1	us-gaap	Inventory Net InventoryNet	5124569000	USD
CY2021Q1	us-gaap	Inventory Net InventoryNet	3157159000	USD
CY2022Q1	us-gaap	Other Assets Current OtherAssetsCurrent	212922000	USD
CY2021Q1	us-gaap	Other Assets Current OtherAssetsCurrent	91833000	USD
CY2022Q1	us-gaap	Assets Current AssetsCurrent	6549290000	USD
CY2021Q1	us-gaap	Assets Current AssetsCurrent	4116796000	USD
CY2022Q1	us-gaap	Notes Receivable Net NotesReceivableNet	15289701000	USD
CY2021Q1	us-gaap	Notes Receivable Net NotesReceivableNet	13489819000	USD
CY2022Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3209068000	USD
CY2021Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3055563000	USD
CY2022Q1	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	120931000	USD
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CY2022Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	490659000	USD
CY2021Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	282797000	USD
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CY2021Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	415465000	USD
CY2022Q1	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	0	USD
CY2021Q1	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	218000	USD
CY2022Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	44197000	USD
CY2021Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	30953000	USD
CY2022Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	11203000	USD
CY2021Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	9927000	USD
CY2022Q1	kmx	Non Recourse Debt Current NonRecourseDebtCurrent	521069000	USD
CY2021Q1	kmx	Non Recourse Debt Current NonRecourseDebtCurrent	442652000	USD
CY2022Q1	us-gaap	Liabilities Current LiabilitiesCurrent	2047457000	USD
CY2021Q1	us-gaap	Liabilities Current LiabilitiesCurrent	1698548000	USD
CY2022Q1	us-gaap	Other Long Term Debt Noncurrent OtherLongTermDebtNoncurrent	3255304000	USD
CY2021Q1	us-gaap	Other Long Term Debt Noncurrent OtherLongTermDebtNoncurrent	1322415000	USD
CY2022Q1	kmx	Non Recourse Debt Non Current NonRecourseDebtNonCurrent	14919715000	USD
CY2021Q1	kmx	Non Recourse Debt Non Current NonRecourseDebtNonCurrent	13297504000	USD
CY2022Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	523269000	USD
CY2021Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	423618000	USD
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CY2021Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	434843000	USD
CY2022Q1	us-gaap	Liabilities Liabilities	21102825000	USD
CY2021Q1	us-gaap	Liabilities Liabilities	17176928000	USD
CY2022Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2021Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2022Q1	us-gaap	Common Stock Value CommonStockValue	80527000	USD
CY2021Q1	us-gaap	Common Stock Value CommonStockValue	81586000	USD
CY2022Q1	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1677268000	USD
CY2021Q1	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1513821000	USD
CY2022Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-46422000	USD
CY2021Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-118691000	USD
CY2022Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3524066000	USD
CY2021Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2887897000	USD
CY2022Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5235439000	USD
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4364613000	USD
CY2022Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	26338264000	USD
CY2021Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	21541541000	USD
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1151297000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	746919000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	888433000	USD
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	273188000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	242156000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	215811000	USD
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	109197000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	121899000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	108861000	USD
CY2022	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	141692000	USD
CY2021	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	160703000	USD
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	185695000	USD
CY2022	kmx	Provision For Contract Cancellation Reserves ProvisionForContractCancellationReserves	114928000	USD
CY2021	kmx	Provision For Contract Cancellation Reserves ProvisionForContractCancellationReserves	72235000	USD
CY2020	kmx	Provision For Contract Cancellation Reserves ProvisionForContractCancellationReserves	89272000	USD
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	15000000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-35787000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1102000	USD
CY2022	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	19139000	USD
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	1409000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-3507000	USD
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	288195000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	43507000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	51240000	USD
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	1967432000	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	323318000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	326961000	USD
CY2022	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	80790000	USD
CY2021	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	50000	USD
CY2020	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	19843000	USD
CY2022	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	1941574000	USD
CY2021	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	300838000	USD
CY2020	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	1308919000	USD
CY2022	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	32272000	USD
CY2021	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	12862000	USD
CY2020	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-4265000	USD
CY2022	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	175106000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	106788000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	85442000	USD
CY2022	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-200456000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-65169000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-109827000	USD
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-2549450000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	667760000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-236606000	USD
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	308534000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	164536000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	331896000	USD
CY2022	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	260000	USD
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	1846000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	3000	USD
CY2022	us-gaap	Proceeds From Sales Of Business Affiliate And Productive Assets ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets	12298000	USD
CY2021	us-gaap	Proceeds From Sales Of Business Affiliate And Productive Assets ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets	29911000	USD
CY2020	us-gaap	Proceeds From Sales Of Business Affiliate And Productive Assets ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets	0	USD
CY2022	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	24614000	USD
CY2021	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	3729000	USD
CY2020	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	59050000	USD
CY2022	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	38408000	USD
CY2021	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	8325000	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	1579000	USD
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-241563000	USD
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-523745000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-128183000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-389364000	USD
CY2022	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	0	USD
CY2021	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-40000	USD
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-1089000	USD
CY2022	kmx	Proceeds From Revolving Line Of Credit And Long Term Debt ProceedsFromRevolvingLineOfCreditAndLongTermDebt	7684400000	USD
CY2021	kmx	Proceeds From Revolving Line Of Credit And Long Term Debt ProceedsFromRevolvingLineOfCreditAndLongTermDebt	1754300000	USD
CY2020	kmx	Proceeds From Revolving Line Of Credit And Long Term Debt ProceedsFromRevolvingLineOfCreditAndLongTermDebt	6277600000	USD
CY2022	kmx	Payments On Revolving Line Of Credit And Long Term Debt PaymentsOnRevolvingLineOfCreditAndLongTermDebt	5752796000	USD
CY2021	kmx	Payments On Revolving Line Of Credit And Long Term Debt PaymentsOnRevolvingLineOfCreditAndLongTermDebt	2217305000	USD
CY2020	kmx	Payments On Revolving Line Of Credit And Long Term Debt PaymentsOnRevolvingLineOfCreditAndLongTermDebt	6199793000	USD
CY2022	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	20132000	USD
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	18296000	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	20102000	USD
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	11923000	USD
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	7424000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	4151000	USD
CY2022	kmx	Proceeds From Issuance Of Non Recourse Debt ProceedsFromIssuanceOfNonRecourseDebt	14328298000	USD
CY2021	kmx	Proceeds From Issuance Of Non Recourse Debt ProceedsFromIssuanceOfNonRecourseDebt	10805546000	USD
CY2020	kmx	Proceeds From Issuance Of Non Recourse Debt ProceedsFromIssuanceOfNonRecourseDebt	11786432000	USD
CY2022	kmx	Payments On Non Recourse Debt PaymentsOnNonRecourseDebt	12626308000	USD
CY2021	kmx	Payments On Non Recourse Debt PaymentsOnNonRecourseDebt	10654011000	USD
CY2020	kmx	Payments On Non Recourse Debt PaymentsOnNonRecourseDebt	10708564000	USD
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	576478000	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	229938000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	567747000	USD
CY2022	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	79805000	USD
CY2021	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	143148000	USD
CY2020	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	124397000	USD
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	3104866000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-424020000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	686983000	USD
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	31671000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	115557000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	61013000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	771947000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	656390000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	595377000	USD
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	803618000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	771947000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	656390000	USD
CY2022Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	102716000	USD
CY2021Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	132319000	USD
CY2020Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	58211000	USD
CY2022Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	548099000	USD
CY2021Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	496415000	USD
CY2020Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	481043000	USD
CY2022Q1	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	152803000	USD
CY2021Q1	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	143213000	USD
CY2020Q1	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	117136000	USD
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	803618000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	771947000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	656390000	USD
CY2019Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3357028000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	888433000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-82061000	USD
CY2022	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	79805000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	48122000	USD
CY2020	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	561657000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	124397000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-5387000	USD
CY2020Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3768875000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	746919000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	31380000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	49656000	USD
CY2021	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	216290000	USD
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	143147000	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-5768000	USD
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4364613000	USD
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1151297000	USD
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	72269000	USD
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	56762000	USD
CY2022	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	90571000	USD
CY2022	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	561625000	USD
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-18253000	USD
CY2022Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5235439000	USD
CY2022	us-gaap	Nature Of Operations NatureOfOperations	Business and BackgroundCarMax, Inc. (“we,” “our,” “us,” “CarMax” and “the company”), including its wholly owned subsidiaries, is the nation’s largest retailer of used vehicles. We operate in two reportable segments: CarMax Sales Operations and CarMax Auto Finance (“CAF”). Our CarMax Sales Operations segment consists of all aspects of our auto merchandising and service operations, excluding financing provided by CAF. Our CAF segment consists solely of our own finance operation that provides financing to customers buying retail vehicles from CarMax. On June 1, 2021, we completed the acquisition of Edmunds Holding Company (“Edmunds”), which does not meet the quantitative thresholds to be considered a reportable segment. See Note 20 for additional information on our reportable segments and Note 2 for additional information regarding our acquisition of Edmunds.We deliver an unrivaled customer experience by offering a broad selection of quality used vehicles and related products and services at competitive, no-haggle prices using a customer-friendly sales process. Our omni-channel platform, which gives us the largest addressable market in the used car industry, empowers our retail customers to buy a car on their terms – online, in-store or a seamless combination of both. Customers can choose to complete the car-buying experience in-person at one of our stores; or buy the car online and receive delivery through express pickup, available nationwide, or home delivery, available to most customers. We offer customers a range of related products and services, including the appraisal and purchase of vehicles directly from consumers; the financing of retail vehicle purchases through CAF and third-party finance providers; the sale of extended protection plan (“EPP”) products, which include extended service plans (“ESPs”) and guaranteed asset protection (“GAP”); and vehicle repair service. Vehicles purchased through the appraisal process that do not meet our retail standards are sold to licensed dealers through on-site or virtual wholesale auctions.
CY2022	kmx	Investment Maturity Period InvestmentMaturityPeriod	three months or less
CY2022Q1	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	0	USD
CY2021Q1	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	46900000	USD
CY2022Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	548100000	USD
CY2021Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	496400000	USD
CY2022	kmx	Number Of Warehouses NumberOfWarehouses	3	warehouse
CY2022Q1	us-gaap	Investments And Other Noncurrent Assets InvestmentsAndOtherNoncurrentAssets	108500000	USD
CY2021Q1	us-gaap	Investments And Other Noncurrent Assets InvestmentsAndOtherNoncurrentAssets	152900000	USD
CY2022Q1	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	267000000	USD
CY2021Q1	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	223100000	USD
CY2022Q1	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	44000000	USD
CY2021Q1	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	42900000	USD
CY2022	us-gaap	Revenue Recognition Sales Returns Reserve For Sales Returns RevenueRecognitionSalesReturnsReserveForSalesReturns	79800000	USD
CY2021	us-gaap	Revenue Recognition Sales Returns Reserve For Sales Returns RevenueRecognitionSalesReturnsReserveForSalesReturns	33900000	USD
CY2022	us-gaap	Advertising Expense AdvertisingExpense	332200000	USD
CY2021	us-gaap	Advertising Expense AdvertisingExpense	218600000	USD
CY2020	us-gaap	Advertising Expense AdvertisingExpense	191800000	USD
CY2021Q2	us-gaap	Business Acquisition Cost Of Acquired Entity Transaction Costs BusinessAcquisitionCostOfAcquiredEntityTransactionCosts	8000000	USD
CY2021Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther	11277000	USD
CY2021Q2	us-gaap	Stock Issued During Period Shares Acquisitions StockIssuedDuringPeriodSharesAcquisitions	776097	shares
CY2021Q2	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	8700000	USD
CY2021Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents	9484000	USD
CY2021Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Receivables BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables	33719000	USD
CY2021Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther	2397000	USD
CY2021Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	20741000	USD
CY2021Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill	218000000	USD
CY2021Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Noncurrent Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets	191000	USD
CY2021Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	523040000	USD
CY2021Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Accounts Payable BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable	5063000	USD
CY2021Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets	3823000	USD
CY2021Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Capital Lease Obligation BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseObligation	88264000	USD
CY2021Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	121222000	USD
CY2021Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	401818000	USD
CY2021Q2	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	8400000	USD
CY2021Q2	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill	218000000	USD
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	31900400000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	18950100000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	20320000000	USD
CY2022	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	1296800000	USD
CY2021	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	1142000000	USD
CY2020	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	1104100000	USD
CY2022	us-gaap	Financing Interest Expense FinancingInterestExpense	228800000	USD
CY2021	us-gaap	Financing Interest Expense FinancingInterestExpense	314100000	USD
CY2020	us-gaap	Financing Interest Expense FinancingInterestExpense	358100000	USD
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1068000000	USD
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	827900000	USD
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	746000000.0	USD
CY2022	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	141700000	USD
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	160700000	USD
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	185700000	USD
CY2022	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	926300000	USD
CY2021	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	667200000	USD
CY2020	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	560300000	USD
CY2022	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	0	USD
CY2021	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	2200000	USD
CY2022	kmx	Total Average Managed Receivables TotalAverageManagedReceivables	14934000000	USD
CY2020	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	0	USD
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	50500000	USD
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	46000000.0	USD
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	42300000	USD
CY2022	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	6600000	USD
CY2021	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	800000	USD
CY2020	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	700000	USD
CY2022	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	67700000	USD
CY2021	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	55400000	USD
CY2020	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	61300000	USD
CY2022	us-gaap	Direct Operating Costs DirectOperatingCosts	124800000	USD
CY2021	us-gaap	Direct Operating Costs DirectOperatingCosts	102200000	USD
CY2020	us-gaap	Direct Operating Costs DirectOperatingCosts	104300000	USD
CY2022	kmx	Net Income Loss From Financing NetIncomeLossFromFinancing	801500000	USD
CY2021	kmx	Net Income Loss From Financing NetIncomeLossFromFinancing	562800000	USD
CY2020	kmx	Net Income Loss From Financing NetIncomeLossFromFinancing	456000000.0	USD
CY2021	kmx	Total Average Managed Receivables TotalAverageManagedReceivables	13463300000	USD
CY2020	kmx	Total Average Managed Receivables TotalAverageManagedReceivables	13105100000	USD
CY2022Q1	us-gaap	Non Recourse Debt NonRecourseDebt	15470000000	USD
CY2021Q1	us-gaap	Non Recourse Debt NonRecourseDebt	13760000000	USD
CY2022Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	15652300000	USD
CY2021Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	13847200000	USD
CY2022Q1	us-gaap	Interest Receivable InterestReceivable	67300000	USD
CY2021Q1	us-gaap	Interest Receivable InterestReceivable	57400000	USD
CY2022Q1	us-gaap	Other Receivables OtherReceivables	3100000	USD
CY2021Q1	us-gaap	Other Receivables OtherReceivables	-3700000	USD
CY2022Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	433000000.0	USD
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	411100000	USD
CY2022Q1	us-gaap	Notes Receivable Net NotesReceivableNet	15289700000	USD
CY2021Q1	us-gaap	Notes Receivable Net NotesReceivableNet	13489800000	USD
CY2022Q1	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	7765000000	USD
CY2022Q1	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	3596900000	USD
CY2022Q1	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	2453300000	USD
CY2022Q1	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	1227700000	USD
CY2022Q1	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	492400000	USD
CY2022Q1	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	117000000.0	USD
CY2022Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	15652300000	USD
CY2022Q1	kmx	Total Ending Managed Receivables As Percentage By Major Credit Grade TotalEndingManagedReceivablesAsPercentageByMajorCreditGrade	1.000
CY2021Q1	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	5561700000	USD
CY2021Q1	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	4112600000	USD
CY2021Q1	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	2337200000	USD
CY2021Q1	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	1226900000	USD
CY2021Q1	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	494900000	USD
CY2021Q1	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	113900000	USD
CY2021Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	13847200000	USD
CY2021Q1	kmx	Total Ending Managed Receivables As Percentage By Major Credit Grade TotalEndingManagedReceivablesAsPercentageByMajorCreditGrade	1.000
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	411100000	USD
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	227200000	USD
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	107400000	USD
CY2022	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	141700000	USD
CY2022Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	433000000.0	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	157800000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	359800000	USD
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	230400000	USD
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	121000000.0	USD
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	160700000	USD
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	411100000	USD
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	21900000	USD
CY2022Q1	us-gaap	Notes And Loans Receivable Gross Current NotesAndLoansReceivableGrossCurrent	15022300000	USD
CY2022Q1	us-gaap	Notes And Loans Receivable Gross Noncurrent NotesAndLoansReceivableGrossNoncurrent	630000000.0	USD
CY2022Q1	kmx	Past Due Receivables As Percentage Of Total Ending Managed Receivables PastDueReceivablesAsPercentageOfTotalEndingManagedReceivables	0.0402
CY2022Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	15652300000	USD
CY2021Q1	us-gaap	Notes And Loans Receivable Gross Current NotesAndLoansReceivableGrossCurrent	13454700000	USD
CY2021Q1	us-gaap	Notes And Loans Receivable Gross Noncurrent NotesAndLoansReceivableGrossNoncurrent	392500000	USD
CY2021Q1	kmx	Past Due Receivables As Percentage Of Total Ending Managed Receivables PastDueReceivablesAsPercentageOfTotalEndingManagedReceivables	0.0283
CY2021Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	13847200000	USD
CY2022Q1	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	701865000	USD
CY2022Q1	us-gaap	Trading Securities TradingSecurities	24022000	USD
CY2022Q1	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	774678000	USD
CY2022Q1	kmx	Item As Percentage Of Total Assets At Fair Value ItemAsPercentageOfTotalAssetsAtFairValue	1.000
CY2022Q1	kmx	Item As Percentage Of Total Assets ItemAsPercentageOfTotalAssets	0.029
CY2022Q1	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	1379000	USD
CY2022Q1	kmx	Item As Percentage Of Total Liabilities ItemAsPercentageOfTotalLiabilities	0
CY2021Q1	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	685585000	USD
CY2021Q1	us-gaap	Trading Securities TradingSecurities	24049000	USD
CY2021Q1	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	714196000	USD
CY2021Q1	kmx	Item As Percentage Of Total Assets At Fair Value ItemAsPercentageOfTotalAssetsAtFairValue	1.000
CY2021Q1	kmx	Item As Percentage Of Total Assets ItemAsPercentageOfTotalAssets	0.033
CY2021Q1	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	6024000	USD
CY2021Q1	kmx	Item As Percentage Of Total Liabilities ItemAsPercentageOfTotalLiabilities	0
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-02-28
CY2022Q1	us-gaap	Senior Notes SeniorNotes	500000000	USD
CY2021Q1	us-gaap	Senior Notes SeniorNotes	500000000	USD
CY2022Q1	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	517396000	USD
CY2021Q1	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	556993000	USD
CY2022Q1	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	157890000	USD
CY2021Q1	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	127142000	USD
CY2022Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	4646616000	USD
CY2021Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	4469827000	USD
CY2022Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1437548000	USD
CY2021Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1414264000	USD
CY2022Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3209068000	USD
CY2021Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3055563000	USD
CY2022	us-gaap	Depreciation Depreciation	215300000	USD
CY2021	us-gaap	Depreciation Depreciation	195300000	USD
CY2020	us-gaap	Depreciation Depreciation	190600000	USD
CY2022Q1	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	31900000	USD
CY2022Q1	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	31900000	USD
CY2022Q1	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	218000000	USD
CY2022Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	-11544000	USD
CY2022Q1	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	206456000	USD
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11500000	USD
CY2022Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	15400000	USD
CY2022Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	15400000	USD
CY2022Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	15400000	USD
CY2022Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	15400000	USD
CY2022Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	15400000	USD
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	4440000	USD
CY2021Q1	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	124500000	USD
CY2020Q1	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	117900000	USD
CY2022	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	94700000	USD
CY2021	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	65600000	USD
CY2022	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	114900000	USD
CY2021	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	72200000	USD
CY2022Q1	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	144700000	USD
CY2021Q1	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	124500000	USD
CY2022Q1	kmx	Cancellation Reserves Current Portion CancellationReservesCurrentPortion	78700000	USD
CY2021Q1	kmx	Cancellation Reserves Current Portion CancellationReservesCurrentPortion	58700000	USD
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	264194000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	209447000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	225858000	USD
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	61855000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	44678000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	47797000	USD
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	326049000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	254125000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	273655000	USD
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	10560000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-27971000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	146000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-7816000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1248000	USD
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	15000000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-35787000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1102000	USD
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	341049000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	218338000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	272553000	USD
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.037
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.033
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.034
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.018
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.016
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.011
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.007
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.005
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.007
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.007
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.006
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.005
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.229
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.226
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.235
CY2022Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	122791000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	67185000	USD
CY2022Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	104454000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	0	USD
CY2022Q1	us-gaap	Deferred Tax Assets Investment In Subsidiaries DeferredTaxAssetsInvestmentInSubsidiaries	0	USD
CY2021Q1	us-gaap	Deferred Tax Assets Investment In Subsidiaries DeferredTaxAssetsInvestmentInSubsidiaries	135437000	USD
CY2022Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	4236000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	0	USD
CY2022Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	38637000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	0	USD
CY2022Q1	kmx	Deferred Tax Assets Leasing Arrangements DeferredTaxAssetsLeasingArrangements	144693000	USD
CY2021Q1	kmx	Deferred Tax Assets Leasing Arrangements DeferredTaxAssetsLeasingArrangements	115583000	USD
CY2022Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	40579000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	54681000	USD
CY2022Q1	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	0	USD
CY2021Q1	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	9317000	USD
CY2022Q1	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	745000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	901000	USD
CY2022Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	456135000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	383104000	USD
CY2022Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1455000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	901000	USD
CY2022Q1	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	454680000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	382203000	USD
CY2022Q1	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	51088000	USD
CY2021Q1	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	0	USD
CY2022Q1	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	0	USD
CY2021Q1	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	21302000	USD
CY2022Q1	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	115263000	USD
CY2021Q1	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	75383000	USD
CY2022Q1	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	137095000	USD
CY2021Q1	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	110006000	USD
CY2022Q1	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Inventory Costs DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts	19147000	USD
CY2021Q1	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Inventory Costs DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts	11251000	USD
CY2022Q1	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	11156000	USD
CY2021Q1	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	0	USD
CY2022Q1	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	333749000	USD
CY2021Q1	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	217942000	USD
CY2022Q1	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	120931000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	164261000	USD
CY2021Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	28997000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	30865000	USD
CY2019Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	30270000	USD
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	432000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	188000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	3493000	USD
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	5056000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	4468000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2913000	USD
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2657000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3634000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	4170000	USD
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	391000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	4000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	326000	USD
CY2022	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1874000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1218000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	3829000	USD
CY2022Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	24765000	USD
CY2021Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	28997000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	30865000	USD
CY2022Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	24800000	USD
CY2022Q1	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	8500000	USD
CY2021Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	29000000	USD
CY2021Q1	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	7600000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	30900000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	9200000	USD
CY2022Q1	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	3400000	USD
CY2021Q1	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	4700000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	4000000	USD
CY2022Q1	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	214928000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	209773000	USD
CY2022Q1	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	284291000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	307992000	USD
CY2022Q1	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-69363000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-98219000	USD
CY2022Q1	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	630000	USD
CY2021Q1	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	639000	USD
CY2022Q1	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	68733000	USD
CY2021Q1	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	97580000	USD
CY2022Q1	us-gaap	Defined Benefit Plan Amounts Recognized In Balance Sheet DefinedBenefitPlanAmountsRecognizedInBalanceSheet	-69363000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Amounts Recognized In Balance Sheet DefinedBenefitPlanAmountsRecognizedInBalanceSheet	-98219000	USD
CY2022	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-2068000	USD
CY2021	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-945000	USD
CY2020	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-1107000	USD
CY2022	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	-22517000	USD
CY2021	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	-33913000	USD
CY2020	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	68861000	USD
CY2022Q1	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	214928000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	209773000	USD
CY2022Q1	kmx	Financing Obligations FinancingObligations	524766000	USD
CY2021Q1	kmx	Financing Obligations FinancingObligations	533578000	USD
CY2022Q1	us-gaap	Non Recourse Debt NonRecourseDebt	15466799000	USD
CY2021Q1	us-gaap	Non Recourse Debt NonRecourseDebt	13764808000	USD
CY2022Q1	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	18734417000	USD
CY2021Q1	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	15098386000	USD
CY2022Q1	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	532272000	USD
CY2021Q1	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	452579000	USD
CY2022Q1	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	27126000	USD
CY2021Q1	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	25888000	USD
CY2022Q1	us-gaap	Long Term Debt LongTermDebt	18175019000	USD
CY2021Q1	us-gaap	Long Term Debt LongTermDebt	14619919000	USD
CY2022Q1	kmx	Financing Obligation Payments Due Next Fiscal Year FinancingObligationPaymentsDueNextFiscalYear	53780000	USD
CY2022Q1	kmx	Financing Obligation Payments Due Year Two FinancingObligationPaymentsDueYearTwo	56075000	USD
CY2022Q1	kmx	Financing Obligations Payments Due Year Three FinancingObligationsPaymentsDueYearThree	54747000	USD
CY2022Q1	kmx	Financing Obligations Payments Due Year Four FinancingObligationsPaymentsDueYearFour	57943000	USD
CY2022Q1	kmx	Financing Obligations Payments Due Year Five FinancingObligationsPaymentsDueYearFive	48592000	USD
CY2022Q1	kmx	Financing Obligations Payments Due After Year Five FinancingObligationsPaymentsDueAfterYearFive	797328000	USD
CY2022Q1	kmx	Financing Obligations Payments Due FinancingObligationsPaymentsDue	1068465000	USD
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CY2022Q1	kmx	Financing Obligations FinancingObligations	524766000	USD
CY2022Q1	us-gaap	Non Recourse Debt NonRecourseDebt	15470000000	USD
CY2022	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	5900000	USD
CY2021	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	3300000	USD
CY2020	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	7000000	USD
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CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	124211000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	110757000	USD
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	111933000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	124211000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	110757000	USD
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CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.000
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CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum	0.361
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Maximum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum	0.561
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum	0.268
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Maximum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum	0.326
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CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Weighted Average Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate	0.382
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CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P4Y7M6D
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CY2020	us-gaap	Net Income Loss NetIncomeLoss	888433000	USD
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CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	165133000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	166820000	shares
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.09
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.58
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.39
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.97
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.52
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.33
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CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1355679	shares
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CY2020	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-4824000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-82061000	USD
CY2020Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-150071000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	13113000	USD
CY2021	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-18267000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	31380000	USD
CY2021Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-118691000	USD
CY2022	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	57245000	USD
CY2022	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-15024000	USD
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	72269000	USD
CY2022Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-46422000	USD
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	22517000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	33913000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-68861000	USD
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	5483000	USD
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	8184000	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-16607000	USD
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	17034000	USD
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	25729000	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-52254000	USD
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-3473000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-3837000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-1874000	USD
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-846000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-926000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-444000	USD
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-2627000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-2911000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-1430000	USD
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-19661000	USD
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-28640000	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	50824000	USD
CY2022	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	54105000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	-17122000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	-47083000	USD
CY2022	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	13894000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-4506000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-12452000	USD
CY2022	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	40211000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-12616000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-34631000	USD
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	-16680000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	-20841000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	-4614000	USD
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-4283000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-5485000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-1220000	USD
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-12397000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-15356000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-3394000	USD
CY2022	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	52608000	USD
CY2021	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	2740000	USD
CY2020	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	-31237000	USD
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	72269000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	31380000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-82061000	USD
CY2022Q1	kmx	Accumulated Other Comprehensive Income Loss Deferred Taxes AccumulatedOtherComprehensiveIncomeLossDeferredTaxes	14200000	USD
CY2021Q1	kmx	Accumulated Other Comprehensive Income Loss Deferred Taxes AccumulatedOtherComprehensiveIncomeLossDeferredTaxes	38700000	USD
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	75629000	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	57325000	USD
CY2022Q1	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	127183000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	57656000	USD
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	13230000	USD
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	8362000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	5769000	USD
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	17015000	USD
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	10724000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	7678000	USD
CY2022	kmx	Finance Lease Cost FinanceLeaseCost	30245000	USD
CY2021	kmx	Finance Lease Cost FinanceLeaseCost	19086000	USD
CY2020	kmx	Finance Lease Cost FinanceLeaseCost	13447000	USD
CY2022	us-gaap	Lease Cost LeaseCost	105874000	USD
CY2021	us-gaap	Lease Cost LeaseCost	76411000	USD
CY2020	us-gaap	Lease Cost LeaseCost	71103000	USD
CY2022Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	537357000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	431652000	USD
CY2021Q1	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	109665000	USD
CY2022Q1	kmx	Totalleaseassets Totalleaseassets	664540000	USD
CY2021Q1	kmx	Totalleaseassets Totalleaseassets	541317000	USD
CY2022Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	44197000	USD
CY2021Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	30953000	USD
CY2022Q1	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	10290000	USD
CY2021Q1	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	9422000	USD
CY2022Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	523269000	USD
CY2021Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	423618000	USD
CY2022Q1	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	145179000	USD
CY2021Q1	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	120094000	USD
CY2022Q1	kmx	Totalleaseliabilities Totalleaseliabilities	722935000	USD
CY2021Q1	kmx	Totalleaseliabilities Totalleaseliabilities	584087000	USD
CY2022Q1	kmx	Finance Lease Accumulated Depreciation FinanceLeaseAccumulatedDepreciation	30700000	USD
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-02-28
CY2021Q1	kmx	Finance Lease Accumulated Depreciation FinanceLeaseAccumulatedDepreciation	17500000	USD
CY2022Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P17Y3M21D
CY2021Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P19Y4M13D
CY2022Q1	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P12Y5M1D
CY2021Q1	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P13Y6M21D
CY2022Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0480	Rate
CY2021Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0536	Rate
CY2022Q1	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.1435	Rate
CY2021Q1	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.1509	Rate
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	72371000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	56762000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	57145000	USD
CY2022	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	11194000	USD
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	8517000	USD
CY2020	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	4027000	USD
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	11923000	USD
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	7424000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	4151000	USD
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	50911000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	14010000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	27136000	USD
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	32052000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	45857000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	53111000	USD
CY2022Q1	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	70500000	USD
CY2022Q1	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	26474000	USD
CY2022Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	69983000	USD
CY2022Q1	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	32059000	USD
CY2022Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	69475000	USD
CY2022Q1	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	28830000	USD
CY2022Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	63946000	USD
CY2022Q1	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	29778000	USD
CY2022Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	57050000	USD
CY2022Q1	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	25427000	USD
CY2022Q1	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	571431000	USD
CY2022Q1	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	191876000	USD
CY2022Q1	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	902385000	USD
CY2022Q1	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	334444000	USD
CY2022Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	334919000	USD
CY2022Q1	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	178975000	USD
CY2022Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	567466000	USD
CY2022Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	155469000	USD
CY2022Q1	kmx	Lessee Lease Not Yet Commenced Amount LesseeLeaseNotYetCommencedAmount	43900000	USD
CY2022	us-gaap	Interest Paid InterestPaid	91686000	USD
CY2021	us-gaap	Interest Paid InterestPaid	86437000	USD
CY2020	us-gaap	Interest Paid InterestPaid	85607000	USD
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	373234000	USD
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	247748000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	286008000	USD
CY2022	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	14837000	USD
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	-25595000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	3840000	USD
CY2022	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	0	USD
CY2021	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	4726000	USD
CY2020	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	48942000	USD
CY2021Q2	us-gaap	Former Gain Contingency Recognized In Current Period FormerGainContingencyRecognizedInCurrentPeriod	40300000	USD
CY2022Q1	us-gaap	Proceeds From Legal Settlements ProceedsFromLegalSettlements	3800000	USD
CY2021Q4	us-gaap	Proceeds From Legal Settlements ProceedsFromLegalSettlements	22600000	USD
CY2022Q1	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	18500000	USD
CY2021Q1	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	15200000	USD
CY2022Q1	us-gaap	Purchase Obligation PurchaseObligation	200900000	USD
CY2022Q1	us-gaap	Purchase Obligation Due In Next Twelve Months PurchaseObligationDueInNextTwelveMonths	108000000	USD
CY2022	us-gaap	Revenues Revenues	31900412000	USD
CY2022	us-gaap	Revenues Revenues	31900412000	USD
CY2022	us-gaap	Gross Profit GrossProfit	3287542000	USD
CY2022	kmx	Net Income Loss From Financing NetIncomeLossFromFinancing	801507000	USD
CY2022	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	2325220000	USD
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	211956000	USD
CY2022	us-gaap	Interest Expense InterestExpense	94095000	USD
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-34568000	USD
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1492346000	USD

Files In Submission

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$KMX
CARMAX INC Stock $kmx

2022 Q1 Form 10-K Financial Statement

#000117001022000017 Filed on April 14, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KMX CARMAX INC Stock $kmx

2022 Q1 Form 10-K Financial Statement

#000117001022000017 Filed on April 14, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KMX
CARMAX INC Stock $kmx