XML 34 R23.htm IDEA: XBRL DOCUMENT
v3.8.0.1

CarMax Auto Finance (Tables) | 6 Months Ended
--- | ---
Aug. 31, 2017
CarMax Auto Finance Income [Abstract] |
Components Of CarMax Auto Finance Income | Components of CAF Income
| Three Months Ended August 31 |  | Six Months Ended August 31
(In millions) | 2017 |  | % (1) |  | 2016 |  | % (1) |  | 2017 |  | % (1) |  | 2016 |  | % (1)
Interest margin: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest and fee income | $ | 213.6 |  |  | 7.7 |  |  | $ | 190.2 |  |  | 7.6 |  |  | $ | 420.3 |  |  | 7.7 |  |  | $ | 374.3 |  |  | 7.6 |
Interest expense | (52.2 | ) |  | (1.9 | ) |  | (41.8 | ) |  | (1.7 | ) |  | (101.2 | ) |  | (1.8 | ) |  | (81.2 | ) |  | (1.6 | )
Total interest margin | 161.4 |  |  | 5.8 |  |  | 148.4 |  |  | 5.9 |  |  | 319.1 |  |  | 5.8 |  |  | 293.1 |  |  | 5.9 |
Provision for loan losses | (32.9 | ) |  | (1.2 | ) |  | (35.7 | ) |  | (1.4 | ) |  | (61.5 | ) |  | 1.1 |  |  | (62.3 | ) |  | (1.3 | )
Total interest margin after provision for loan losses | 128.5 |  |  | 4.6 |  |  | 112.7 |  |  | 4.5 |  |  | 257.6 |  |  | 4.7 |  |  | 230.8 |  |  | 4.7 |
Direct expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payroll and fringe benefit expense | (8.8 | ) |  | (0.3 | ) |  | (7.7 | ) |  | (0.3 | ) |  | (17.3 | ) |  | (0.3 | ) |  | (15.4 | ) |  | (0.3 | )
Other direct expenses | (11.8 | ) |  | (0.4 | ) |  | (9.0 | ) |  | (0.4 | ) |  | (23.0 | ) |  | (0.4 | ) |  | (18.7 | ) |  | (0.4 | )
Total direct expenses | (20.6 | ) |  | (0.7 | ) |  | (16.7 | ) |  | (0.7 | ) |  | (40.3 | ) |  | (0.7 | ) |  | (34.1 | ) |  | (0.7 | )
CarMax Auto Finance income | $ | 107.9 |  |  | 3.9 |  |  | $ | 96.0 |  |  | 3.8 |  |  | $ | 217.3 |  |  | 4.0 |  |  | $ | 196.7 |  |  | 4.0 |
Total average managed receivables | $ | 11,112.0 |  |  |  |  |  | $ | 10,049.8 |  |  |  |  |  | $ | 10,970.8 |  |  |  |  | $ | 9,897.4 |  |  |
(1) | Annualized percentage of total average managed receivables.

X
- Definition Auto Finance Income [Abstract] + References No definition available. + Details
Name: | kmx_AutoFinanceIncomeAbstract
Namespace Prefix: | kmx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule Of Components Of Net Income Loss From Financing [Table Text Block] + References No definition available. + Details
Name: | kmx_ScheduleOfComponentsOfNetIncomeLossFromFinancingTableTextBlock
Namespace Prefix: | kmx_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration