Accumulated Other Comprehensive Income (Loss) (Changes In and Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2022	May 31, 2021
Total amortization reclassifications recognized in net pension expense	$ 636	$ 868
Tax expense	(155)	(209)
Amortization reclassifications recognized in net pension expense, net of tax	481	659
Net change in retirement benefit plan unrecognized actuarial losses, net of tax	481	659
Changes in fair value	70,042	(2,006)
Tax (expense) benefit	(17,987)	528
Changes in fair value, net of tax	52,055	(1,478)
Reclassifications to CarMax Auto Finance income	(299)	5,098
Tax benefit (expense)	77	(1,342)
Reclassification of hedge gains (losses), net of tax	(222)	3,756
Net change in cash flow hedge unrecognized losses, net of tax	51,833	2,278
Total other comprehensive income, net of tax	52,314	2,937
Cost of sales
Total amortization reclassifications recognized in net pension expense	265	357
CarMax Auto Finance income
Total amortization reclassifications recognized in net pension expense	16	22
Selling, general and administrative expenses
Total amortization reclassifications recognized in net pension expense	$ 355	$ 489