Consolidated Statements Of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	May 31, 2023	May 31, 2022
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 7,687,063	$ 9,311,621
TOTAL COST OF SALES	6,869,673	8,436,230
GROSS PROFIT	817,390	875,391
CARMAX AUTO FINANCE INCOME	137,358	204,473
Selling, general and administrative expenses	559,837	656,740
Depreciation, Depletion and Amortization, Nonproduction	58,419	55,648
Interest expense	30,466	28,775
Other (income) expense	(1,214)	2,099
Earnings before income taxes	307,240	336,602
Income tax provision	78,942	84,337
NET EARNINGS	$ 228,298	$ 252,265
WEIGHTED AVERAGE COMMON SHARES:
Basic, shares	158,116	160,298
Diluted, shares	158,561	161,798
NET EARNINGS PER SHARE:
Basic (in dollars per share)	$ 1.44	$ 1.57
Diluted (in dollars per share)	$ 1.44	$ 1.56
Used vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 6,001,471	$ 7,014,490
TOTAL COST OF SALES	5,486,846	6,451,010
Wholesale vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	1,514,363	2,116,517
TOTAL COST OF SALES	1,346,538	1,924,850
Total other sales and revenues
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	171,229	180,614
TOTAL COST OF SALES	$ 36,289	$ 60,370
NET SALES AND OPERATING REVENUES
Percentage of Sales
Item as a percent of net sales and operating revenues	100.00%	100.00%
TOTAL COST OF SALES
Percentage of Sales
Item as a percent of net sales and operating revenues	89.40%	90.60%
GROSS PROFIT
Percentage of Sales
Item as a percent of net sales and operating revenues	10.60%	9.40%
CARMAX AUTO FINANCE INCOME
Percentage of Sales
Item as a percent of net sales and operating revenues	1.80%	2.20%
Selling, general and administrative expenses
Percentage of Sales
Item as a percent of net sales and operating revenues	7.30%	7.10%
Depreciation and Amortization, Nonproduction
Percentage of Sales
Item as a percent of net sales and operating revenues	0.80%	0.60%
Interest expense
Percentage of Sales
Item as a percent of net sales and operating revenues	0.40%	0.30%
Other (income) expense
Percentage of Sales
Item as a percent of net sales and operating revenues	0.00%	0.00%
Earnings before income taxes
Percentage of Sales
Item as a percent of net sales and operating revenues	4.00%	3.60%
Income tax provision
Percentage of Sales
Item as a percent of net sales and operating revenues	1.00%	0.90%
NET EARNINGS
Percentage of Sales
Item as a percent of net sales and operating revenues	3.00%	2.70%
NET SALES AND OPERATING REVENUES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	78.10%	75.30%
NET SALES AND OPERATING REVENUES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	19.70%	22.70%
NET SALES AND OPERATING REVENUES | Total other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	2.20%	1.90%
TOTAL COST OF SALES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	71.40%	69.30%
TOTAL COST OF SALES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	17.50%	20.70%
TOTAL COST OF SALES | Total other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	0.50%	0.60%