Accumulated Other Comprehensive Loss (Changes In and Reclassifications Out of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2021	May 31, 2020
Total amortization reclassifications recognized in net pension expense	$ 868	$ 959
Tax expense	(209)	(231)
Amortization reclassifications recognized in net pension expense, net of tax	659	728
Net change in retirement benefit plan unrecognized actuarial losses, net of tax	659	728
Changes in fair value	(2,006)	(24,862)
Tax benefit	528	6,575
Changes in fair value, net of tax	(1,478)	(18,287)
Reclassifications to CarMax Auto Finance income	5,098	3,025
Tax expense	(1,342)	(800)
Reclassification of hedge losses, net of tax	3,756	2,225
Net change in cash flow hedge unrecognized losses, net of tax	2,278	(16,062)
Total other comprehensive income (loss), net of tax	2,937	(15,334)
Cost of sales
Total amortization reclassifications recognized in net pension expense	357	373
CarMax Auto Finance income
Total amortization reclassifications recognized in net pension expense	22	31
Selling, general and administrative expenses
Total amortization reclassifications recognized in net pension expense	$ 489	$ 555