Consolidated Statements Of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 6,223,371	$ 6,148,538	$ 20,350,297	$ 20,909,437
TOTAL COST OF SALES	5,545,725	5,535,675	18,120,289	18,782,419
GROSS PROFIT	677,646	612,863	2,230,008	2,127,018
CARMAX AUTO FINANCE INCOME	159,885	148,659	422,435	421,004
Selling, general and administrative expenses	575,764	559,962	1,824,904	1,705,493
Depreciation, Depletion and Amortization, Nonproduction	64,507	60,623	190,277	177,859
Interest expense	25,418	31,265	83,801	93,316
Other expense (income)	5,370	(886)	2,505	(4,730)
Earnings before income taxes	166,472	110,558	550,956	576,084
Income tax provision	41,031	28,555	140,266	147,148
NET EARNINGS	$ 125,441	$ 82,003	$ 410,690	$ 428,936
WEIGHTED AVERAGE COMMON SHARES:
Basic, shares	154,582	158,446	155,874	158,347
Diluted, shares	155,265	158,799	156,504	158,866
NET EARNINGS PER SHARE:
Basic (in dollars per share)	$ 0.81	$ 0.52	$ 2.63	$ 2.71
Diluted (in dollars per share)	$ 0.81	$ 0.52	$ 2.62	$ 2.70
Used vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 4,888,858	$ 4,832,077	$ 16,243,415	$ 16,424,691
TOTAL COST OF SALES	4,464,016	4,434,165	14,844,310	15,060,045
Wholesale vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	1,168,639	1,165,204	3,579,543	4,001,542
TOTAL COST OF SALES	1,030,564	1,042,303	3,146,465	3,574,200
Total other sales and revenues
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	165,874	151,257	527,339	483,204
TOTAL COST OF SALES	$ 51,145	$ 59,207	$ 129,514	$ 148,174
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	89.10%	90.00%	89.00%	89.80%
GROSS PROFIT
Percentage of Sales
Item as a percent of net sales and operating revenues	10.90%	10.00%	11.00%	10.20%
CARMAX AUTO FINANCE INCOME
Percentage of Sales
Item as a percent of net sales and operating revenues	2.60%	2.40%	2.10%	2.00%
Selling, general and administrative expenses
Percentage of Sales
Item as a percent of net sales and operating revenues	9.30%	9.10%	9.00%	8.20%
Depreciation and Amortization, Nonproduction
Percentage of Sales
Item as a percent of net sales and operating revenues	1.00%	1.00%	0.90%	0.90%
Interest expense
Percentage of Sales
Item as a percent of net sales and operating revenues	0.40%	0.50%	0.40%	0.40%
Other expense (income)
Percentage of Sales
Item as a percent of net sales and operating revenues	0.10%	0.00%	0.00%	0.00%
Earnings before income taxes
Percentage of Sales
Item as a percent of net sales and operating revenues	2.70%	1.80%	2.70%	2.80%
Income tax provision
Percentage of Sales
Item as a percent of net sales and operating revenues	0.70%	0.50%	0.70%	0.70%
NET EARNINGS
Percentage of Sales
Item as a percent of net sales and operating revenues	2.00%	1.30%	2.00%	2.10%
NET SALES AND OPERATING REVENUES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	78.60%	78.60%	79.80%	78.60%
NET SALES AND OPERATING REVENUES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	18.80%	19.00%	17.60%	19.10%
NET SALES AND OPERATING REVENUES | Total other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	2.70%	2.50%	2.60%	2.30%
TOTAL COST OF SALES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	71.70%	72.10%	72.90%	72.00%
TOTAL COST OF SALES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	16.60%	17.00%	15.50%	17.10%
TOTAL COST OF SALES | Total other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	0.80%	1.00%	0.60%	0.70%