Consolidated Statements Of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2023	Aug. 31, 2022
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 7,073,836	$ 8,144,803	$ 14,760,899	$ 17,456,424
TOTAL COST OF SALES	6,377,071	7,407,658	13,246,744	15,843,888
GROSS PROFIT	696,765	737,145	1,514,155	1,612,536
CARMAX AUTO FINANCE INCOME	134,987	182,869	272,345	387,342
Selling, general and administrative expenses	585,694	666,041	1,145,531	1,322,781
Depreciation, Depletion and Amortization, Nonproduction	58,817	57,692	117,236	113,340
Interest expense	31,585	32,745	62,051	61,520
Other income	(2,630)	(4,039)	(3,844)	(1,940)
Earnings before income taxes	158,286	167,575	465,526	504,177
Income tax provision	39,651	41,670	118,593	126,007
NET EARNINGS	$ 118,635	$ 125,905	$ 346,933	$ 378,170
WEIGHTED AVERAGE COMMON SHARES:
Basic, shares	158,479	158,801	158,298	159,556
Diluted, shares	159,238	160,218	158,900	161,015
NET EARNINGS PER SHARE:
Basic (in dollars per share)	$ 0.75	$ 0.79	$ 2.19	$ 2.37
Diluted (in dollars per share)	$ 0.75	$ 0.79	$ 2.18	$ 2.35
Used vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 5,591,143	$ 6,284,085	$ 11,592,614	$ 13,298,575
TOTAL COST OF SALES	5,139,034	5,789,098	10,625,880	12,240,108
Wholesale vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	1,321,975	1,690,326	2,836,338	3,806,843
TOTAL COST OF SALES	1,185,359	1,549,669	2,531,897	3,474,519
Total other sales and revenues
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	160,718	170,392	331,947	351,006
TOTAL COST OF SALES	$ 52,678	$ 68,891	$ 88,967	$ 129,261
NET SALES AND OPERATING REVENUES
Percentage of Sales
Item as a percent of net sales and operating revenues	100.00%	100.00%	100.00%	100.00%
TOTAL COST OF SALES
Percentage of Sales
Item as a percent of net sales and operating revenues	90.20%	90.90%	89.70%	90.80%
GROSS PROFIT
Percentage of Sales
Item as a percent of net sales and operating revenues	9.80%	9.10%	10.30%	9.20%
CARMAX AUTO FINANCE INCOME
Percentage of Sales
Item as a percent of net sales and operating revenues	1.90%	2.20%	1.80%	2.20%
Selling, general and administrative expenses
Percentage of Sales
Item as a percent of net sales and operating revenues	8.30%	8.20%	7.80%	7.60%
Depreciation and Amortization, Nonproduction
Percentage of Sales
Item as a percent of net sales and operating revenues	0.80%	0.70%	0.80%	0.60%
Interest expense
Percentage of Sales
Item as a percent of net sales and operating revenues	0.40%	0.40%	0.40%	0.40%
Other income
Percentage of Sales
Item as a percent of net sales and operating revenues	0.00%	0.00%	0.00%	0.00%
Earnings before income taxes
Percentage of Sales
Item as a percent of net sales and operating revenues	2.20%	2.10%	3.20%	2.90%
Income tax provision
Percentage of Sales
Item as a percent of net sales and operating revenues	0.60%	0.50%	0.80%	0.70%
NET EARNINGS
Percentage of Sales
Item as a percent of net sales and operating revenues	1.70%	1.50%	2.40%	2.20%
NET SALES AND OPERATING REVENUES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	79.00%	77.20%	78.50%	76.20%
NET SALES AND OPERATING REVENUES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	18.70%	20.80%	19.20%	21.80%
NET SALES AND OPERATING REVENUES | Total other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	2.30%	2.10%	2.20%	2.00%
TOTAL COST OF SALES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	72.60%	71.10%	72.00%	70.10%
TOTAL COST OF SALES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	16.80%	19.00%	17.20%	19.90%
TOTAL COST OF SALES | Total other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	0.70%	0.80%	0.60%	0.70%