XML 109 R61.htm IDEA: XBRL DOCUMENT v3.24.3

Accumulated Other Comprehensive Income (Loss) (Narrative) (Details) - USD ($) $ in Millions	Aug. 31, 2024	Feb. 29, 2024
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Deferred tax	$ 3.0	$ 19.3

X

- Definition

The balance of deferred taxes on items remaining in accumulated other comprehensive income loss

+ References

No definition available.

+ Details

Name:	kmx_AccumulatedOtherComprehensiveIncomeLossDeferredTaxes
Namespace Prefix:	kmx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_ComprehensiveIncomeNetOfTaxAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration