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, 2025	May 31, 2024
Total amortization reclassifications recognized in net pension expense	$ 100	$ 111
Tax expense	(24)	(27)
Amortization reclassifications recognized in net pension expense, net of tax	76	84
Net change in retirement benefit plan unrecognized actuarial losses, net of tax	76	84
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(4,594)	(17,509)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	1,115	4,228
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	(3,479)	(13,281)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(10,464)	(14,498)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	2,541	3,532
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	(7,923)	(10,966)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	(11,402)	2,315
Total other comprehensive (loss) income, net of tax	(11,326)	2,399
Cost of sales
Total amortization reclassifications recognized in net pension expense	44	50
CarMax Auto Finance income
Total amortization reclassifications recognized in net pension expense	4	4
Selling, general and administrative expenses
Total amortization reclassifications recognized in net pension expense	$ 52	$ 57