Consolidated Statements Of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	May 31, 2020	May 31, 2019
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 3,228,782	$ 5,366,318
TOTAL COST OF SALES	2,874,599	4,623,935
GROSS PROFIT	354,183	742,383
CARMAX AUTO FINANCE INCOME	50,950	115,959
Selling, general and administrative expenses	373,716	489,660
Interest expense	23,958	17,784
Other expense (income)	3,295	(359)
Earnings before income taxes	4,164	351,257
Income tax provision	(814)	84,513
NET EARNINGS	$ 4,978	$ 266,744
WEIGHTED AVERAGE COMMON SHARES:
Basic, shares	162,673	166,324
Diluted, shares	163,537	167,643
NET EARNINGS PER SHARE:
Basic (in dollars per share)	$ 0.03	$ 1.60
Diluted (in dollars per share)	$ 0.03	$ 1.59
Used vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 2,786,202	$ 4,540,657
TOTAL COST OF SALES	2,524,676	4,043,824
Wholesale vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	342,852	662,449
TOTAL COST OF SALES	280,922	536,490
Total other sales and revenues
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	99,728	163,212
TOTAL COST OF SALES	$ 69,001	$ 43,621
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	89.00%	86.20%
GROSS PROFIT
Percentage of Sales
Item as a percent of net sales and operating revenues	11.00%	13.80%
CARMAX AUTO FINANCE INCOME
Percentage of Sales
Item as a percent of net sales and operating revenues	1.60%	2.20%
Selling, general and administrative expenses
Percentage of Sales
Item as a percent of net sales and operating revenues	11.60%	9.10%
Interest expense
Percentage of Sales
Item as a percent of net sales and operating revenues	0.70%	0.30%
Other expense (income)
Percentage of Sales
Item as a percent of net sales and operating revenues	0.10%	0.00%
Earnings before income taxes
Percentage of Sales
Item as a percent of net sales and operating revenues	0.10%	6.50%
Income tax provision
Percentage of Sales
Item as a percent of net sales and operating revenues	0.00%	1.60%
NET EARNINGS
Percentage of Sales
Item as a percent of net sales and operating revenues	0.20%	5.00%
NET SALES AND OPERATING REVENUES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	86.30%	84.60%
NET SALES AND OPERATING REVENUES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	10.60%	12.30%
NET SALES AND OPERATING REVENUES | Total other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	3.10%	3.00%
TOTAL COST OF SALES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	78.20%	75.40%
TOTAL COST OF SALES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	8.70%	10.00%
TOTAL COST OF SALES | Total other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	2.10%	0.80%