Consolidated Statements Of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 6,505,956	$ 8,527,759	$ 23,962,380	$ 24,213,717
TOTAL COST OF SALES	5,929,268	7,691,199	21,773,156	21,637,164
GROSS PROFIT	576,688	836,560	2,189,224	2,576,553
CARMAX AUTO FINANCE INCOME	152,196	165,968	539,538	607,732
Selling, general and administrative expenses	591,727	575,930	1,914,508	1,704,285
Depreciation, Depletion and Amortization, Nonproduction	57,377	54,428	170,717	157,107
Interest expense	30,150	24,303	91,670	67,247
Other income	(363)	(8,094)	(2,303)	(35,453)
Earnings before income taxes	49,993	355,961	554,170	1,291,099
Income tax provision	12,413	86,523	138,420	299,638
NET EARNINGS	$ 37,580	$ 269,438	$ 415,750	$ 991,461
WEIGHTED AVERAGE COMMON SHARES:
Basic, shares	158,003	162,006	159,044	162,710
Diluted, shares	158,536	164,873	160,195	165,606
NET EARNINGS PER SHARE:
Basic (in dollars per share)	$ 0.24	$ 1.66	$ 2.61	$ 6.09
Diluted (in dollars per share)	$ 0.24	$ 1.63	$ 2.60	$ 5.99
Used vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 5,204,584	$ 6,435,590	$ 18,503,159	$ 18,697,300
TOTAL COST OF SALES	4,801,790	5,927,237	17,041,898	17,085,416
Wholesale vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	1,152,207	1,922,283	4,959,050	4,998,212
TOTAL COST OF SALES	1,037,534	1,710,103	4,512,053	4,411,175
Total other sales and revenues
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	149,165	169,886	500,171	518,205
TOTAL COST OF SALES	$ 89,944	$ 53,859	$ 219,205	$ 140,573
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	91.10%	90.20%	90.90%	89.40%
GROSS PROFIT
Percentage of Sales
Item as a percent of net sales and operating revenues	8.90%	9.80%	9.10%	10.60%
CARMAX AUTO FINANCE INCOME
Percentage of Sales
Item as a percent of net sales and operating revenues	2.30%	1.90%	2.30%	2.50%
Selling, general and administrative expenses
Percentage of Sales
Item as a percent of net sales and operating revenues	9.10%	6.80%	8.00%	7.00%
Depreciation and Amortization, Nonproduction
Percentage of Sales
Item as a percent of net sales and operating revenues	0.90%	0.60%	0.70%	0.60%
Interest expense
Percentage of Sales
Item as a percent of net sales and operating revenues	0.50%	0.30%	0.40%	0.30%
Other income
Percentage of Sales
Item as a percent of net sales and operating revenues	0.00%	(0.10%)	0.00%	(0.10%)
Earnings before income taxes
Percentage of Sales
Item as a percent of net sales and operating revenues	0.80%	4.20%	2.30%	5.30%
Income tax provision
Percentage of Sales
Item as a percent of net sales and operating revenues	0.20%	1.00%	0.60%	1.20%
NET EARNINGS
Percentage of Sales
Item as a percent of net sales and operating revenues	0.60%	3.20%	1.70%	4.10%
NET SALES AND OPERATING REVENUES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	80.00%	75.50%	77.20%	77.20%
NET SALES AND OPERATING REVENUES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	17.70%	22.50%	20.70%	20.60%
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%	2.00%	2.10%	2.10%
TOTAL COST OF SALES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	73.80%	69.50%	71.10%	70.60%
TOTAL COST OF SALES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	15.90%	20.10%	18.80%	18.20%
TOTAL COST OF SALES | Total other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	1.40%	0.60%	0.90%	0.60%