Consolidated Statements Of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2025	Nov. 30, 2024	Nov. 30, 2025	Nov. 30, 2024
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 5,793,946	$ 6,223,371	$ 19,935,171	$ 20,350,297
TOTAL COST OF SALES	5,203,898	5,545,725	17,733,834	18,120,289
GROSS PROFIT	590,048	677,646	2,201,337	2,230,008
CARMAX AUTO FINANCE INCOME	174,738	159,885	419,026	422,435
Selling, general and administrative expenses	581,368	575,764	1,842,104	1,824,904
Depreciation, Depletion and Amortization, Nonproduction	68,943	64,507	201,967	190,277
Interest expense	26,120	25,418	81,643	83,801
Other expense	4,468	5,370	535	2,505
Earnings before income taxes	83,887	166,472	494,114	550,956
Income tax provision	21,672	41,031	126,140	140,266
NET EARNINGS	$ 62,215	$ 125,441	$ 367,974	$ 410,690
WEIGHTED AVERAGE COMMON SHARES:
Basic, shares	145,548	154,582	149,004	155,874
Diluted, shares	145,864	155,265	149,382	156,504
NET EARNINGS PER SHARE:
Basic (in dollars per share)	$ 0.43	$ 0.81	$ 2.47	$ 2.63
Diluted (in dollars per share)	$ 0.43	$ 0.81	$ 2.46	$ 2.62
Used vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	$ 4,548,197	$ 4,888,858	$ 15,922,349	$ 16,243,415
TOTAL COST OF SALES	4,169,250	4,464,016	14,546,602	14,844,310
Wholesale vehicle sales
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	1,095,119	1,168,639	3,497,425	3,579,543
TOTAL COST OF SALES	980,366	1,030,564	3,088,781	3,146,465
Total other sales and revenues
SALES AND OPERATING REVENUES:
NET SALES AND OPERATING REVENUES	150,630	165,874	515,397	527,339
TOTAL COST OF SALES	$ 54,282	$ 51,145	$ 98,451	$ 129,514
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	89.80%	89.10%	89.00%	89.00%
GROSS PROFIT
Percentage of Sales
Item as a percent of net sales and operating revenues	10.20%	10.90%	11.00%	11.00%
CARMAX AUTO FINANCE INCOME
Percentage of Sales
Item as a percent of net sales and operating revenues	3.00%	2.60%	2.10%	2.10%
Selling, general and administrative expenses
Percentage of Sales
Item as a percent of net sales and operating revenues	10.00%	9.30%	9.20%	9.00%
Depreciation and Amortization, Nonproduction
Percentage of Sales
Item as a percent of net sales and operating revenues	1.20%	1.00%	1.00%	0.90%
Interest expense
Percentage of Sales
Item as a percent of net sales and operating revenues	0.50%	0.40%	0.40%	0.40%
Other expense
Percentage of Sales
Item as a percent of net sales and operating revenues	0.10%	0.10%	0.00%	0.00%
Earnings before income taxes
Percentage of Sales
Item as a percent of net sales and operating revenues	1.40%	2.70%	2.50%	2.70%
Income tax provision
Percentage of Sales
Item as a percent of net sales and operating revenues	0.40%	0.70%	0.60%	0.70%
NET EARNINGS
Percentage of Sales
Item as a percent of net sales and operating revenues	1.10%	2.00%	1.80%	2.00%
NET SALES AND OPERATING REVENUES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	78.50%	78.60%	79.90%	79.80%
NET SALES AND OPERATING REVENUES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	18.90%	18.80%	17.50%	17.60%
NET SALES AND OPERATING REVENUES | Total other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	2.60%	2.70%	2.60%	2.60%
TOTAL COST OF SALES | Used vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	72.00%	71.70%	73.00%	72.90%
TOTAL COST OF SALES | Wholesale vehicle sales
Percentage of Sales
Item as a percent of net sales and operating revenues	16.90%	16.60%	15.50%	15.50%
TOTAL COST OF SALES | Total other sales and revenues
Percentage of Sales
Item as a percent of net sales and operating revenues	0.90%	0.80%	0.50%	0.60%