Consolidated Statements Of Earnings - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2021
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 29,684,873	$ 31,900,412	$ 18,950,149
TOTAL COST OF SALES	26,884,670	28,612,870	16,571,024
GROSS PROFIT	2,800,203	3,287,542	2,379,125
CARMAX AUTO FINANCE INCOME	663,404	801,507	562,810
Selling, General and Administrative Expense	2,487,357	2,325,220	1,704,419
Depreciation, Depletion and Amortization, Nonproduction	228,449	211,956	194,356
Interest expense	120,398	94,095	86,178
Nonoperating Income (Expense)	(9,401)	(34,568)	(8,275)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	636,804	1,492,346	965,257
Income tax provision	152,042	341,049	218,338
Net earnings	$ 484,762	$ 1,151,297	$ 746,919
Basic (in shares)	158,800	162,410	163,183
Diluted (in shares)	159,771	165,176	165,133
Basic (in dollars per share)	$ 3.05	$ 7.09	$ 4.58
Diluted (in dollars per share)	$ 3.03	$ 6.97	$ 4.52
Used vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 23,034,286	$ 24,437,095	$ 15,713,583
TOTAL COST OF SALES	21,186,135	22,398,651	14,124,715
Wholesale vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	5,989,796	6,763,813	2,668,753
TOTAL COST OF SALES	5,399,969	5,999,277	2,245,431
Other sales and revenues
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	660,791	699,504	567,813
TOTAL COST OF SALES	$ 298,566	$ 214,942	$ 200,878
NET SALES AND OPERATING REVENUES
Percentage of Sales
Item as a percent of net sales and operating revenues	100.00%	100.00%	100.00%
TOTAL COST OF SALES
Percentage of Sales
Item as a percent of net sales and operating revenues	90.60%	89.70%	87.40%
GROSS PROFIT
Percentage of Sales
Item as a percent of net sales and operating revenues	9.40%	10.30%	12.60%
CARMAX AUTO FINANCE INCOME
Percentage of Sales
Item as a percent of net sales and operating revenues	2.20%	2.50%	3.00%
Selling, general and administrative expenses
Percentage of Sales
Item as a percent of net sales and operating revenues	8.40%	7.30%	9.00%
Depreciation and Amortization
Percentage of Sales
Item as a percent of net sales and operating revenues	0.80%	0.70%	1.00%
Interest expense
Percentage of Sales
Item as a percent of net sales and operating revenues	0.40%	0.30%	0.50%
Other (income) expense
Percentage of Sales
Item as a percent of net sales and operating revenues	0.00%	(0.10%)	0.00%
Earnings before income taxes
Percentage of Sales
Item as a percent of net sales and operating revenues	2.10%	4.70%	5.10%
Income tax provision
Percentage of Sales
Item as a percent of net sales and operating revenues	0.50%	1.10%	1.20%
NET EARNINGS
Percentage of Sales
Item as a percent of net sales and operating revenues	1.60%	3.60%	3.90%
NET SALES AND OPERATING REVENUES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	77.60%	76.60%	82.90%
NET SALES AND OPERATING REVENUES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	20.20%	21.20%	14.10%
NET SALES AND OPERATING REVENUES | Other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	2.20%	2.20%	3.00%
TOTAL COST OF SALES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	71.40%	70.20%	74.50%
TOTAL COST OF SALES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	18.20%	18.80%	11.80%
TOTAL COST OF SALES | Other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	1.00%	0.70%	1.10%