XML 25 R33.htm IDEA: XBRL DOCUMENT v2.4.1.9

CarMax Auto Finance Income (Components Of CarMax Auto Finance Income) (Details) (USD $)	3 Months Ended				9 Months Ended
	Nov. 30, 2014		Nov. 30, 2013		Nov. 30, 2014		Nov. 30, 2013
Auto Finance Income [Line Items]
Interest and fee income	$ 152,700,000us-gaap_InterestAndFeeIncomeLoansAndLeases		$ 138,300,000us-gaap_InterestAndFeeIncomeLoansAndLeases		$ 450,400,000us-gaap_InterestAndFeeIncomeLoansAndLeases		$ 409,000,000us-gaap_InterestAndFeeIncomeLoansAndLeases
Interest expense	(24,800,000)us-gaap_FinancingInterestExpense		(22,200,000)us-gaap_FinancingInterestExpense		(71,800,000)us-gaap_FinancingInterestExpense		(67,600,000)us-gaap_FinancingInterestExpense
Total interest margin	127,900,000us-gaap_InterestIncomeExpenseNet		116,100,000us-gaap_InterestIncomeExpenseNet		378,600,000us-gaap_InterestIncomeExpenseNet		341,400,000us-gaap_InterestIncomeExpenseNet
Provision for loan losses	(24,100,000)us-gaap_ProvisionForLoanLeaseAndOtherLosses		(19,700,000)us-gaap_ProvisionForLoanLeaseAndOtherLosses		(60,300,000)us-gaap_ProvisionForLoanLeaseAndOtherLosses		(49,000,000)us-gaap_ProvisionForLoanLeaseAndOtherLosses
Total interest margin after provision for loan losses	103,800,000us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss		96,400,000us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss		318,300,000us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss		292,400,000us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
Other income	0us-gaap_OtherNonoperatingIncome				0us-gaap_OtherNonoperatingIncome		100,000us-gaap_OtherNonoperatingIncome
Payroll and fringe benefit expense	(6,300,000)us-gaap_LaborAndRelatedExpense		(5,600,000)us-gaap_LaborAndRelatedExpense		(18,800,000)us-gaap_LaborAndRelatedExpense		(16,700,000)us-gaap_LaborAndRelatedExpense
Other direct expenses	(7,800,000)us-gaap_OtherCostAndExpenseOperating		(6,900,000)us-gaap_OtherCostAndExpenseOperating		(22,600,000)us-gaap_OtherCostAndExpenseOperating		(20,500,000)us-gaap_OtherCostAndExpenseOperating
Total direct expenses	(14,100,000)us-gaap_DirectOperatingCosts		(12,500,000)us-gaap_DirectOperatingCosts		(41,400,000)us-gaap_DirectOperatingCosts		(37,200,000)us-gaap_DirectOperatingCosts
CarMax Auto Finance income	89,722,000kmx_NetIncomeLossFromFinancing		83,905,000kmx_NetIncomeLossFromFinancing		276,911,000kmx_NetIncomeLossFromFinancing		255,346,000kmx_NetIncomeLossFromFinancing
Average Balance of Loans Held in Porfolio	$ 8,026,200,000kmx_Kmx_averageBalanceOfLoansHeldInPorfolio		$ 6,805,300,000kmx_Kmx_averageBalanceOfLoansHeldInPorfolio		$ 7,713,600,000kmx_Kmx_averageBalanceOfLoansHeldInPorfolio		$ 6,491,400,000kmx_Kmx_averageBalanceOfLoansHeldInPorfolio
Interest And Fee Income [Member]
Auto Finance Income [Line Items]
Item as percent of total average managed receivables	7.60%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_InterestAndFeeIncomeMember	[1]	8.10%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_InterestAndFeeIncomeMember	[1]	7.80%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_InterestAndFeeIncomeMember	[1]	8.40%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_InterestAndFeeIncomeMember	[1]
Interest Expense [Member]
Auto Finance Income [Line Items]
Item as percent of total average managed receivables	(1.20%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = us-gaap_InterestExpenseMember	[1]	(1.30%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = us-gaap_InterestExpenseMember	[1]	(1.20%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = us-gaap_InterestExpenseMember	[1]	(1.40%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = us-gaap_InterestExpenseMember	[1]
Total Interest Margin [Member]
Auto Finance Income [Line Items]
Item as percent of total average managed receivables	6.40%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_InterestIncomeExpenseNetMember	[1]	6.80%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_InterestIncomeExpenseNetMember	[1]	6.50%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_InterestIncomeExpenseNetMember	[1]	7.00%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_InterestIncomeExpenseNetMember	[1]
Provision For Loan Losses [Member]
Auto Finance Income [Line Items]
Item as percent of total average managed receivables	(1.20%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_ProvisionForLoanLossesMember	[1]	(1.20%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_ProvisionForLoanLossesMember	[1]	(1.00%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_ProvisionForLoanLossesMember	[1]	(1.00%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_ProvisionForLoanLossesMember	[1]
Total Interest Margin After Provision For Loan Losses [Member]
Auto Finance Income [Line Items]
Item as percent of total average managed receivables	5.20%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_TotalInterestMarginAfterProvisionForLoanLossesMember	[1]	5.70%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_TotalInterestMarginAfterProvisionForLoanLossesMember	[1]	5.50%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_TotalInterestMarginAfterProvisionForLoanLossesMember	[1]	6.00%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_TotalInterestMarginAfterProvisionForLoanLossesMember	[1]
Other Income [Member]
Auto Finance Income [Line Items]
Item as percent of total average managed receivables	0.00%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_TotalOtherGainMember	[1]	0.00%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_TotalOtherGainMember	[1]	0.00%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_TotalOtherGainMember	[1]	0.00%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_TotalOtherGainMember	[1]
Payroll And Fringe Benefit Expense [Member]
Auto Finance Income [Line Items]
Item as percent of total average managed receivables	(0.30%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_PayrollAndFringeBenefitExpenseMember	[1]	(0.30%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_PayrollAndFringeBenefitExpenseMember	[1]	(0.30%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_PayrollAndFringeBenefitExpenseMember	[1]	(0.30%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_PayrollAndFringeBenefitExpenseMember	[1]
Other Direct Expenses [Member]
Auto Finance Income [Line Items]
Item as percent of total average managed receivables	(0.40%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_OtherDirectExpensesMember	[1]	(0.40%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_OtherDirectExpensesMember	[1]	(0.40%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_OtherDirectExpensesMember	[1]	(0.40%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_OtherDirectExpensesMember	[1]
Total Direct Expenses [Member]
Auto Finance Income [Line Items]
Item as percent of total average managed receivables	(0.70%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_TotalDirectExpensesMember	[1]	(0.70%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_TotalDirectExpensesMember	[1]	(0.70%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_TotalDirectExpensesMember	[1]	(0.80%)kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_TotalDirectExpensesMember	[1]
CAF Income [Member]
Auto Finance Income [Line Items]
Item as percent of total average managed receivables	4.50%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_CarmaxAutoFinanceIncomeMember	[1]	4.90%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_CarmaxAutoFinanceIncomeMember	[1]	4.80%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_CarmaxAutoFinanceIncomeMember	[1]	5.20%kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly / us-gaap_StatementScenarioAxis = kmx_CarmaxAutoFinanceIncomeMember	[1]
[1] Annualized percentage of total average managed receivables.

X

- Details

Name:	kmx_AutoFinanceIncomeLineItems
Namespace Prefix:	kmx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Item as percent of total average managed receivables, principal only

+ References

No definition available.

+ Details

Name:	kmx_ItemAsPercentOfTotalAverageManagedReceivablesPrincipalOnly
Namespace Prefix:	kmx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

This is the result of the average balance during the period of total loans managed or securitized less securitized loans and loans that are in the process of being securitized.

+ References

No definition available.

+ Details

Name:	kmx_Kmx_averageBalanceOfLoansHeldInPorfolio
Namespace Prefix:	kmx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Income (loss) generated from the entity's financing of used and new vehicle retail sales, excluding the allocation of indirect costs or income.

+ References

No definition available.

+ Details

Name:	kmx_NetIncomeLossFromFinancing
Namespace Prefix:	kmx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The aggregate direct operating costs incurred during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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

X

- Definition

This element represents interest incurred for borrowed money which was used to produce goods or render services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 2

-Article 5

+ Details

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

X

- Definition

The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.1)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 1

-Article 9

+ Details

Name:	us-gaap_InterestAndFeeIncomeLoansAndLeases
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of interest income or expense, including any amortization and accretion (as applicable) of discounts and premiums, including consideration of the provisions for loan, lease, credit, and other related losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.12)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 12

-Article 9

+ Details

Name:	us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The net amount of operating interest income (expense).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.10)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 10

-Article 9

+ Details

Name:	us-gaap_InterestIncomeExpenseNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The aggregate amount of expenditures for salaries, wages, profit sharing and incentive compensation, and other employee benefits, including equity-based compensation, and pension and other postretirement benefit expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.4)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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

X

- Definition

The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 3

-Article 5

+ Details

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

X

- Definition

The aggregate amount of other income amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.7)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Article 5

+ Details

Name:	us-gaap_OtherNonoperatingIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 11

-Article 9



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.11)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

+ Details

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

X

- Details

Name:	us-gaap_StatementScenarioAxis=kmx_CarmaxAutoFinanceIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=kmx_InterestAndFeeIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=kmx_InterestIncomeExpenseNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=kmx_OtherDirectExpensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=kmx_PayrollAndFringeBenefitExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=kmx_ProvisionForLoanLossesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=kmx_TotalDirectExpensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=kmx_TotalInterestMarginAfterProvisionForLoanLossesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=kmx_TotalOtherGainMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_InterestExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: