Consolidated Statements Of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2023	Nov. 30, 2022	Nov. 30, 2023	Nov. 30, 2022
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 6,148,538	$ 6,505,956	$ 20,909,437	$ 23,962,380
TOTAL COST OF SALES	5,535,675	5,929,268	18,782,419	21,773,156
GROSS PROFIT	612,863	576,688	2,127,018	2,189,224
CARMAX AUTO FINANCE INCOME	148,659	152,196	421,004	539,538
Selling, general and administrative expenses	559,962	591,727	1,705,493	1,914,508
Depreciation, Depletion and Amortization, Nonproduction	60,623	57,377	177,859	170,717
Interest expense	31,265	30,150	93,316	91,670
Other income	(886)	(363)	(4,730)	(2,303)
Earnings before income taxes	110,558	49,993	576,084	554,170
Income tax provision	28,555	12,413	147,148	138,420
NET EARNINGS	$ 82,003	$ 37,580	$ 428,936	$ 415,750
WEIGHTED AVERAGE COMMON SHARES:
Basic, shares	158,446	158,003	158,347	159,044
Diluted, shares	158,799	158,536	158,866	160,195
NET EARNINGS PER SHARE:
Basic (in dollars per share)	$ 0.52	$ 0.24	$ 2.71	$ 2.61
Diluted (in dollars per share)	$ 0.52	$ 0.24	$ 2.70	$ 2.60
Used vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 4,832,077	$ 5,204,584	$ 16,424,691	$ 18,503,159
TOTAL COST OF SALES	4,434,165	4,801,790	15,060,045	17,041,898
Wholesale vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	1,165,204	1,152,207	4,001,542	4,959,050
TOTAL COST OF SALES	1,042,303	1,037,534	3,574,200	4,512,053
Total other sales and revenues
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	151,257	149,165	483,204	500,171
TOTAL COST OF SALES	$ 59,207	$ 89,944	$ 148,174	$ 219,205
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	90.00%	91.10%	89.80%	90.90%
GROSS PROFIT
Percentage of Sales
Item as a percent of net sales and operating revenues	10.00%	8.90%	10.20%	9.10%
CARMAX AUTO FINANCE INCOME
Percentage of Sales
Item as a percent of net sales and operating revenues	2.40%	2.30%	2.00%	2.30%
Selling, general and administrative expenses
Percentage of Sales
Item as a percent of net sales and operating revenues	9.10%	9.10%	8.20%	8.00%
Depreciation and Amortization, Nonproduction
Percentage of Sales
Item as a percent of net sales and operating revenues	1.00%	0.90%	0.90%	0.70%
Interest expense
Percentage of Sales
Item as a percent of net sales and operating revenues	0.50%	0.50%	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	1.80%	0.80%	2.80%	2.30%
Income tax provision
Percentage of Sales
Item as a percent of net sales and operating revenues	0.50%	0.20%	0.70%	0.60%
NET EARNINGS
Percentage of Sales
Item as a percent of net sales and operating revenues	1.30%	0.60%	2.10%	1.70%
NET SALES AND OPERATING REVENUES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	78.60%	80.00%	78.60%	77.20%
NET SALES AND OPERATING REVENUES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	19.00%	17.70%	19.10%	20.70%
NET SALES AND OPERATING REVENUES | Total other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	2.50%	2.30%	2.30%	2.10%
TOTAL COST OF SALES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	72.10%	73.80%	72.00%	71.10%
TOTAL COST OF SALES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	17.00%	15.90%	17.10%	18.80%
TOTAL COST OF SALES | Total other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	1.00%	1.40%	0.70%	0.90%