XML 31 R37.htm IDEA: XBRL DOCUMENT v2.4.1.9
Auto Loan Receivables (Past Due Receivables) (Details) (USD $)
In Millions, unless otherwise specified
Nov. 30, 2014
Feb. 28, 2014
Financing Receivable, Past Due [Line Items]    
Total ending managed receivables $ 8,186.5us-gaap_NotesReceivableGross [1],[2] $ 7,184.4us-gaap_NotesReceivableGross [1],[2]
31-60 days past due 173.6us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue 126.6us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
61-90 days past due 60.0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue 42.6us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
Greater than 90 days past due 17.4us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue 16.0us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
Total past due $ 251.0us-gaap_FinancingReceivableRecordedInvestmentPastDue $ 185.2us-gaap_FinancingReceivableRecordedInvestmentPastDue
Past due receivables as a percentage of total ending managed receivables 3.10%kmx_PastDueReceivablesAsPercentageOfTotalEndingManagedReceivables [3] 2.60%kmx_PastDueReceivablesAsPercentageOfTotalEndingManagedReceivables [3]
Managed Receivables [Member]    
Financing Receivable, Past Due [Line Items]    
Item as percent of total ending managed receivables 100.00%kmx_ItemAsPercentOfTotalEndingManagedReceivables
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= kmx_ManagedReceivablesMember		 [3] 100.00%kmx_ItemAsPercentOfTotalEndingManagedReceivables
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= kmx_ManagedReceivablesMember		 [3]
31-60 Days Past Due [Member]    
Financing Receivable, Past Due [Line Items]    
Past due receivables as a percentage of total ending managed receivables 2.20%kmx_PastDueReceivablesAsPercentageOfTotalEndingManagedReceivables
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= kmx_ThirtyOneToSixtyDaysPastDueMember		 [3] 1.80%kmx_PastDueReceivablesAsPercentageOfTotalEndingManagedReceivables
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= kmx_ThirtyOneToSixtyDaysPastDueMember		 [3]
61-90 Days Past Due [Member]    
Financing Receivable, Past Due [Line Items]    
Past due receivables as a percentage of total ending managed receivables 0.70%kmx_PastDueReceivablesAsPercentageOfTotalEndingManagedReceivables
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= kmx_SixtyOneToNinetyDaysPastDueMember		 [3] 0.60%kmx_PastDueReceivablesAsPercentageOfTotalEndingManagedReceivables
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= kmx_SixtyOneToNinetyDaysPastDueMember		 [3]
Greater Than 90 Days Past Due [Member]    
Financing Receivable, Past Due [Line Items]    
Past due receivables as a percentage of total ending managed receivables 0.20%kmx_PastDueReceivablesAsPercentageOfTotalEndingManagedReceivables
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= kmx_GreaterThanNinetyDaysPastDueMember		 [3] 0.20%kmx_PastDueReceivablesAsPercentageOfTotalEndingManagedReceivables
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= kmx_GreaterThanNinetyDaysPastDueMember		 [3]
[1] Other receivables includes receivables not funded through the warehouse facilities or term securitizations.
[2] Classified based on credit grade assigned when customers were initially approved for financing.
[3] (1)Percentage of total ending managed receivables.