CarMax (KMX) 10-Q 8 Oct 14 2015 Q2 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	6 Months Ended
	Aug. 31, 2014	Sep. 30, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Aug-14	'
Document Fiscal Year Focus	'2015	'
Document Fiscal Period Focus	'Q2	'
Entity Registrant Name	'CARMAX INC	'
Entity Central Index Key	'0001170010	'
Entity Current Reporting Status	'Yes	'
Entity Well-known Seasoned Issuer	'Yes	'
Entity Voluntary Filers	'No	'
Current Fiscal Year End Date	'--02-28	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	215,394,966

Consolidated_Statements_Of_Ear

Consolidated Statements Of Earnings (USD $)	3 Months Ended				6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Aug. 31, 2014		Aug. 31, 2013		Aug. 31, 2014		Aug. 31, 2013
SALES AND OPERATING REVENUES:	'		'		'		'
NET SALES AND OPERATING REVENUES	$3,599,194		$3,245,552		$7,349,390		$6,556,609
Cost of sales	3,135,855		2,810,809		6,384,320		5,673,770
GROSS PROFIT	463,339		434,743		965,070		882,839
CARMAX AUTO FINANCE INCOME	92,574		84,422		187,189		171,441
Selling, general and administrative expenses	297,638		283,206		611,084		573,395
Interest expense	7,351		7,761		14,952		15,639
Other expense	283		1,073		560		832
Earnings before income taxes	250,641		227,125		525,663		464,414
Income tax provision	96,123		86,851		201,492		177,489
NET EARNINGS	154,518		140,274		324,171		286,925
WEIGHTED AVERAGE COMMON SHARES:	'		'		'		'
Basic	218,180		223,610		219,224		224,114
Diluted	221,070		227,634		222,351		228,093
NET EARNINGS PER SHARE:	'		'		'		'
Basic	$0.71		$0.63		$1.48		$1.28
Diluted	$0.70		$0.62		$1.46		$1.26
Used Vehicle Sales [Member]	'		'		'		'
SALES AND OPERATING REVENUES:	'		'		'		'
Used vehicle sales	2,920,165		2,639,523		5,980,506		5,341,278
Percentage of Sales	'		'		'		'
Item as a percent of net sales and operating revenues	81.10%	[1]	81.30%	[1]	81.40%	[1]	81.50%	[1]
New Vehicle Sales [Member]	'		'		'		'
SALES AND OPERATING REVENUES:	'		'		'		'
New vehicle sales	69,944		60,002		139,733		112,429
Percentage of Sales	'		'		'		'
Item as a percent of net sales and operating revenues	1.90%	[1]	1.80%	[1]	1.90%	[1]	1.70%	[1]
Wholesale Vehicle Sales [Member]	'		'		'		'
SALES AND OPERATING REVENUES:	'		'		'		'
Wholesale vehicle sales	530,270		474,907		1,075,515		965,566
Percentage of Sales	'		'		'		'
Item as a percent of net sales and operating revenues	14.70%	[1]	14.60%	[1]	14.60%	[1]	14.70%	[1]
Other Sales And Revenues [Member]	'		'		'		'
SALES AND OPERATING REVENUES:	'		'		'		'
Other sales and revenues	$78,815		$71,120		$153,636		$137,336
Percentage of Sales	'		'		'		'
Item as a percent of net sales and operating revenues	2.20%	[1]	2.20%	[1]	2.10%	[1]	2.10%	[1]
Net Sales And Operating Revenues [Member]	'		'		'		'
Percentage of Sales	'		'		'		'
Item as a percent of net sales and operating revenues	100.00%	[1]	100.00%	[1]	100.00%	[1]	100.00%	[1]
Cost Of Sales [Member]	'		'		'		'
Percentage of Sales	'		'		'		'
Item as a percent of net sales and operating revenues	87.10%	[1]	86.60%	[1]	86.90%	[1]	86.50%	[1]
Gross Profit [Member]	'		'		'		'
Percentage of Sales	'		'		'		'
Item as a percent of net sales and operating revenues	12.90%	[1]	13.40%	[1]	13.10%	[1]	13.50%	[1]
CAF Income [Member]	'		'		'		'
Percentage of Sales	'		'		'		'
Item as a percent of net sales and operating revenues	2.60%	[1]	2.60%	[1]	2.50%	[1]	2.60%	[1]
Selling, General And Administrative Expenses [Member]	'		'		'		'
Percentage of Sales	'		'		'		'
Item as a percent of net sales and operating revenues	8.30%	[1]	8.70%	[1]	8.30%	[1]	8.70%	[1]
Interest Expense [Member]	'		'		'		'
Percentage of Sales	'		'		'		'
Item as a percent of net sales and operating revenues	0.20%	[1]	0.20%	[1]	0.20%	[1]	0.20%	[1]
Other Loss Income [Member]	'		'		'		'
Percentage of Sales	'		'		'		'
Item as a percent of net sales and operating revenues	0.00%	[1]	0.00%	[1]	0.00%	[1]	0.00%	[1]
Earnings Before Income Taxes [Member]	'		'		'		'
Percentage of Sales	'		'		'		'
Item as a percent of net sales and operating revenues	7.00%	[1]	7.00%	[1]	7.20%	[1]	7.10%	[1]
Income Tax Provision [Member]	'		'		'		'
Percentage of Sales	'		'		'		'
Item as a percent of net sales and operating revenues	2.70%	[1]	2.70%	[1]	2.70%	[1]	2.70%	[1]
Net Earnings [Member]	'		'		'		'
Percentage of Sales	'		'		'		'
Item as a percent of net sales and operating revenues	4.30%	[1]	4.30%	[1]	4.40%	[1]	4.40%	[1]
[1]	Calculated as a percentage of net sales and operating revenues and may not equal totals due to rounding.

Consolidated_Statements_Of_Com

Consolidated Statements Of Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Consolidated Statements Of Comprehensive Income [Abstract]	'	'	'	'
Net earnings	$154,518	$140,274	$324,171	$286,925
Retirement plans:	'	'	'	'
Net change in retirement benefit plan unrecognized actuarial losses	213	270	426	526
Cash flow hedges:	'	'	'	'
Net change in cash flow hedge unrecognized losses	1,096	3,331	1,378	5,373
Other comprehensive income (loss), net of taxes	1,309	3,601	1,804	5,899
TOTAL COMPREHENSIVE INCOME	$155,827	$143,875	$325,975	$292,824

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Aug. 31, 2014	Feb. 28, 2014
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and cash equivalents	$354,600	$627,901
Restricted cash from collections on auto loan receivables	297,068	259,299
Accounts receivable, net	108,859	79,923
Inventory	1,708,955	1,641,424
Deferred income taxes	8,275	7,866
Other current assets	38,685	26,811
TOTAL CURRENT ASSETS	2,516,442	2,643,224
Auto loan receivable, net	7,844,268	7,147,848
Property and equipment, net	1,753,992	1,652,977
Deferred income taxes	157,175	152,199
Other assets	128,036	110,909
TOTAL ASSETS	12,399,913	11,707,157
LIABILITIES AND SHAREHOLDERS' EQUITY	'	'
Accounts payable	418,269	427,492
Accrued expenses and other current liabilities	205,480	202,588
Accrued income taxes	244	2,438
Short-term debt	2,229	582
Current portion of finance and capital lease obligations	20,280	18,459
Current portion of non-recourse notes payable	260,425	223,938
TOTAL CURRENT LIABILITIES	906,927	875,497
Finance and capital lease obligations, excluding current portion	310,689	315,925
Non-recourse notes payable, excluding current portion	7,648,284	7,024,506
Other liabilities	176,026	174,232
TOTAL LIABILITIES	9,041,926	8,390,160
Commitments and contingent liabilities	'	'
SHAREHOLDERS' EQUITY:	'	'
Common stock, $0.50 par value; 350,000,000 shares authorized; 216,704,250 and 221,685,984 shares issued and outstanding as of August 31, 2014 and February 28, 2014, respectively	108,352	110,843
Capital in excess of par value	1,089,317	1,038,209
Accumulated other comprehensive loss	-44,467	-46,271
Retained earnings	2,204,785	2,214,216
TOTAL SHAREHOLDERS' EQUITY	3,357,987	3,316,997
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$12,399,913	$11,707,157

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Aug. 31, 2014	Feb. 28, 2014
Consolidated Balance Sheets [Abstract]	'	'
Common stock, par value	$0.50	$0.50
Common stock, shares authorized	350,000,000	350,000,000
Common stock, shares issued	216,704,250	221,685,984
Common stock, shares outstanding	216,704,250	221,685,984

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013
OPERATING ACTIVITIES:	'	'
Net earnings	$324,171	$286,925
Adjustments to reconcile net earnings to net cash used in operating activities:	'	'
Depreciation and amortization	55,766	49,160
Share-based compensation expense	37,778	38,002
Provision for loan losses	36,208	29,318
Provision for cancellation reserves	38,463	18,324
Deferred income tax (benefit) provision	-6,530	-3,200
Loss (gain) on disposition of assets and other	917	930
Net decrease (increase) in:	'	'
Accounts receivable, net	-28,936	6,412
Inventory	-67,531	153,797
Other current assets	-11,706	-746
Auto loan receivables, net	-732,628	-799,385
Other assets	-313	-6,736
Net increase (decrease) in:	'	'
Accounts payable, accrued expenses and other current liabilities and accrued income taxes	-36,052	-13,913
Other liabilities	-46,226	-22,497
NET CASH USED IN OPERATING ACTIVITIES	-436,619	-263,609
INVESTING ACTIVITIES:	'	'
Capital expenditures	-135,293	-136,011
Proceeds from sales of assets	5,829	4,716
Increase in restricted cash from collections on auto loan receivables	-37,769	-27,053
Increase in restricted cash in reserve accounts	-6,640	-5,319
Release of restricted cash from reserve accounts	1,634	15,017
(Purchases) sales of money market securities, net	-8,753	1,337
Purchases of Trading Securities	-3,107	-1,405
Proceeds from Sale of Trading Securities	306	33
NET CASH USED IN INVESTING ACTIVITIES	-183,793	-148,685
FINANCING ACTIVITIES:	'	'
Increase (decrease) in short-term debt, net	1,647	1,384
Payments on finance and capital lease obligations	-8,712	-10,932
Issuance of non-recourse notes payable	3,803,000	3,530,000
Payments on non-recourse notes payable	-3,142,735	-2,654,658
Repurchase and retirement of common stock	-373,362	-179,278
Equity issuances, net	37,483	14,753
Excess tax benefits from share-based payment arrangements	29,790	11,693
NET CASH PROVIDED BY FINANCING ACTIVITIES	347,111	712,962
(Decrease) Increase in cash and cash equivalents	-273,301	300,668
Cash and cash equivalents at beginning of year	627,901	449,364
CASH AND CASH EQUIVALENTS AT END OF PERIOD	354,600	750,032
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION	'	'
Cash paid for interest	15,029	15,714
Cash paid for income taxes	191,401	155,623
Non-cash investing and financing activities:	'	'
Increase (decrease) in accrued capital expenditures	18,173	19,745
Increase in finance and capital lease obligations	$5,297	$0

Business_And_Background

Business And Background	6 Months Ended
	Aug. 31, 2014
Business And Background [Abstract]	'
Background	'
	1.Background
	CarMax, Inc. (“we,” “our,” “us,” “CarMax” and “the company”), including its wholly owned subsidiaries, is the largest retailer of used vehicles in the United States.  We operate in two reportable segments:  CarMax Sales Operations and CarMax Auto Finance (“CAF”).  Our CarMax Sales Operations segment consists of all aspects of our auto merchandising and service operations, excluding financing provided by CAF.  Our CAF segment consists solely of our own finance operation that provides vehicle financing through CarMax stores.
	We were the first used vehicle retailer to offer a large selection of high quality used vehicles at low, no-haggle prices using a customer-friendly sales process in an attractive, modern sales facility.  We provide customers with a full range of related products and services, including the appraisal and purchase of vehicles directly from consumers; the financing of vehicle purchases through CAF and third-party financing providers; the sale of extended protection plan (“EPP”) products, which include extended service plans (“ESP”) and guaranteed asset protection (“GAP”); and vehicle repair service.  Vehicles purchased through the appraisal process that do not meet our retail standards are sold to licensed dealers through on-site wholesale auctions.  At select locations we also sell new vehicles under franchise agreements.

Summary_Of_Significant_Account

Summary Of Significant Accounting Policies	6 Months Ended
	Aug. 31, 2014
Summary Of Significant Accounting Policies [Abstract]	'
Summary Of Significant Accounting Policies	'
	2.Accounting Policies
	Basis of Presentation and Use of Estimates.  The accompanying interim unaudited consolidated financial statements include the accounts of CarMax and our wholly owned subsidiaries.  All significant intercompany balances and transactions have been eliminated in consolidation.  These consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) for interim financial information.  Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements.  In the opinion of management, such interim consolidated financial statements reflect all normal recurring adjustments considered necessary to present fairly the financial position and the results of operations and cash flows for the interim periods presented.  The results of operations for the interim periods are not necessarily indicative of the results to be expected for the full fiscal year.  These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and footnotes included in our Annual Report on Form 10-K for the fiscal year ended
	February 28, 2014.
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities.  Actual results could differ from those estimates.  Certain prior year amounts have been reclassified to conform to current year’s presentation.  Amounts and percentages may not total due to rounding.
	Cash and Cash Equivalents.  Cash equivalents of $327.0 million as of August 31, 2014, and $607.0 million as of February 28, 2014, consisted of highly liquid investments with original maturities of three months or less.
	Restricted Cash from Collections on Auto Loan Receivables.  Cash accounts totaling $297.1 million as of August 31, 2014, and $259.3 million as of February 28, 2014, consisted of collections of principal and interest payments on securitized auto loan receivables that are restricted for payment to the securitization investors pursuant to the applicable securitization agreements.
	Securitizations.  We maintain a revolving securitization program composed of two warehouse facilities (“warehouse facilities”) that we use to fund auto loan receivables originated by CAF until we elect to fund them through a term securitization or alternative funding arrangement.  We sell the auto loan receivables to a wholly owned, bankruptcy-remote, special purpose entity that transfers an undivided percentage ownership interest in the receivables, but not the receivables themselves, to entities formed by third-party investors.  These entities issue asset-backed commercial paper or utilize other funding sources supported by the transferred receivables, and the proceeds are used to finance the securitized receivables.
	We typically use term securitizations to provide long-term funding for most of the auto loan receivables initially securitized through the warehouse facilities.  In these transactions, a pool of auto loan receivables is sold to a bankruptcy-remote, special purpose entity that, in turn, transfers the receivables to a special purpose securitization trust.  The securitization trust issues asset-backed securities, secured or otherwise supported by the transferred receivables, and the proceeds from the sale of the asset-backed securities are used to finance the securitized receivables.
	We are required to evaluate term securitization trusts for consolidation.  In our capacity as servicer, we have the power to direct the activities of the trusts that most significantly impact the economic performance of the trusts.  In addition, we have the obligation to absorb losses (subject to limitations) and the rights to receive any returns of the trusts, which could be significant.  Accordingly, we are the primary beneficiary of the trusts and are required to consolidate them.
	We recognize transfers of auto loan receivables into the warehouse facilities and term securitizations (“securitization vehicles”) as secured borrowings, which result in recording the auto loan receivables and the related non-recourse notes payable to the investors on our consolidated balance sheets.
	The securitized receivables can only be used as collateral to settle obligations of the securitization vehicles.  The securitization vehicles and investors have no recourse to our assets beyond the securitized receivables, the amounts on deposit in reserve accounts and the restricted cash from collections on auto loan receivables.  We have not provided financial or other support to the securitization vehicles that was not previously contractually required, and there are no additional arrangements, guarantees or other commitments that could require us to provide financial support to the securitization vehicles.
	See Notes 4 and 10 for additional information on auto loan receivables and non-recourse notes payable.
	Auto Loan Receivables, Net.  Auto loan receivables include amounts due from customers related to retail vehicle sales financed through CAF.  The receivables are presented net of an allowance for estimated loan losses.  The allowance for loan losses represents an estimate of the amount of net losses inherent in our portfolio of managed receivables as of the applicable reporting date and anticipated to occur during the following 12 months.  The allowance is primarily based on the credit quality of the underlying receivables, historical loss trends and forecasted forward loss curves.  We also take into account recent trends in delinquencies and losses, recovery rates and the economic environment.  The provision for loan losses is the periodic expense of maintaining an adequate allowance.
	An account is considered delinquent when the related customer fails to make a substantial portion of a scheduled payment on or before the due date.  In general, accounts are charged-off on the last business day of the month during which the earliest of the following occurs:  the receivable is 120 days or more delinquent as of the last business day of the month, the related vehicle is repossessed and liquidated, or the receivable is otherwise deemed uncollectible.  For purposes of determining impairment, auto loans are evaluated collectively, as they represent a large group of smaller-balance homogeneous loans, and therefore, are not individually evaluated for impairment.  See Note 4 for additional information on auto loan receivables.
	Interest income and expenses related to auto loans are included in CAF income.  Interest income on auto loan receivables is recognized when earned based on contractual loan terms.  All loans continue to accrue interest until repayment or charge‑off.  Direct costs associated with loan originations are not considered material, and thus, are expensed as incurred.  See Note 3 for additional information on CAF income.
	Property and Equipment, Net.  Property and equipment is reported net of accumulated depreciation and amortization of $778.7 million and $730.6 million as of August 31, 2014 and February 28, 2014, respectively.
	Other Assets.  Other assets includes amounts classified as restricted cash on deposit in reserve accounts and restricted investments.  The restricted cash on deposit in reserve accounts is for the benefit of holders of non-recourse notes payable, and these funds are not expected to be available to the company or its creditors.  In the event that the cash generated by the securitized receivables in a given period was insufficient to pay the interest, principal and other required payments, the balances on deposit in the reserve accounts would be used to pay those amounts.  Restricted cash on deposit in reserve accounts was $37.5 million as of August 31, 2014, and $32.5 million as of February 28, 2014.
	Restricted investments includes money market securities primarily held to satisfy certain insurance program requirements, as well as investments held in a rabbi trust established to fund informally our executive deferred compensation plan.  The rabbi trust investments are classified as trading securities with realized and unrealized gains and losses reflected as a component of other expense.  Restricted investments was $52.1 million as of August 31, 2014, and $40.2 million as of February 28, 2014.
	Revenue Recognition.    We recognize revenue when the earnings process is complete, generally either at the time of sale to a customer or upon delivery to a customer.  As part of our customer service strategy, we guarantee the retail vehicles we sell with a 5‑day, money-back guarantee.  We record a reserve for estimated returns based on historical experience and trends.
	We sell EPP products on behalf of unrelated third parties to customers who purchase a vehicle.  In May 2014, the ESPs we offer on all used vehicles were modified to provide coverage of 60 months (subject to mileage limitations).  Prior to this modification, the ESPs we offered provided coverage up to 72 months.  GAP covers the customer for the term of their finance contract. We recognize commission revenue at the time of sale, net of a reserve for estimated customer cancellations.  Periodically, we may receive additional commissions based upon the level of underwriting profits of the third parties who administer the products.  These additional commissions are recognized as revenue when received.  The reserve for cancellations is evaluated for each product, and is based on forecasted forward cancellation curves utilizing historical experience, recent trends and credit mix of the customer base.  Our risk related to customer cancellations is limited to the commissions that we receive.  Cancellations fluctuate depending on the volume of EPP sales, customer financing default or prepayment rates, and shifts in customer behavior, including those related to changes in the coverage or term of the product.  The current portion of estimated cancellation reserves is recognized as a component of other current liabilities with the remaining amount recognized in other liabilities.  See Note 7 for additional information on cancellation reserves.
	Customers applying for financing who are not approved by CAF may be evaluated by other financial institutions.  Depending on the credit profile of the customer, third-party finance providers generally either pay us or are paid a fixed, pre-negotiated fee per contract.  We recognize these fees at the time of sale.
	We collect sales taxes and other taxes from customers on behalf of governmental authorities at the time of sale.  These taxes are accounted for on a net basis and are not included in net sales and operating revenues or cost of sales.
	Derivative Instruments and Hedging Activities.  We enter into derivative instruments to manage exposures that arise from business activities that result in the future known receipt or payment of uncertain cash amounts, the values of which are impacted by interest rates.  We recognize the derivatives at fair value as either current assets or current liabilities on the consolidated balance sheets, and where applicable, such contracts covered by master netting agreements are reported net.  Gross positive fair values are netted with gross negative fair values by counterparty.  The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting, and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting.  We may enter into derivative contracts that are intended to economically hedge certain risks, even though hedge accounting may not apply or we do not elect to apply hedge accounting.  See Note 5 for additional information on derivative instruments and hedging activities.

CarMax_Auto_Finance_Income

CarMax Auto Finance Income	6 Months Ended
	Aug. 31, 2014
CarMax Auto Finance Income [Abstract]	'
CarMax Auto Finance Income	'
	3.CarMax Auto Finance Income
	CAF provides financing to qualified customers purchasing vehicles at CarMax stores.  CAF provides us the opportunity to capture additional sales, profits and cash flows while managing our reliance on third-party finance sources.  Management regularly analyzes CAF's operating results by assessing profitability, the performance of the auto loan receivables including trends in credit losses and delinquencies, and CAF direct expenses.  This information is used to assess CAF's performance and make operating decisions including resource allocation.
	We typically use securitizations to fund loans originated by CAF, as discussed in Note 2.  CAF income primarily reflects the interest and fee income generated by the auto loan receivables less the interest expense associated with the debt issued to fund these receivables, a provision for estimated loan losses and direct CAF expenses.
	CAF income does not include any allocation of indirect costs.  Although CAF benefits from certain indirect overhead expenditures, we present this information on a direct basis to avoid making subjective decisions regarding the indirect benefits or costs that could be attributed to CAF.  Examples of indirect costs not allocated to CAF include retail store expenses and corporate expenses such as human resources, administrative services, marketing, information systems, accounting, legal, treasury and executive payroll.  In addition, except for auto loan receivables, which are disclosed in Note 4, CAF assets are not separately reported nor do we allocate assets to CAF because such allocation would not be useful to management in making operating decisions.
	Components of CAF Income
		Three Months Ended August 31								Six Months Ended August 31
	(In millions)	2014			%  (1)	2013			% (1)	2014		%  (1)	2013			% (1)
	Interest margin:
	Interest and fee income		$	150.7	7.8		$	137.2	8.4	$	297.6	7.9		$	270.7	8.5
	Interest expense			-23.9	-1.2			-22.6	-1.4		-47	-1.2			-45.4	-1.4
	Total interest margin			126.8	6.6			114.6	7.0		250.6	6.6			225.3	7.1
	Provision for loan losses			-20.4	-1.1			-18	-1.1		-36.2	-1			-29.3	-0.9
	Total interest margin after
	provision for loan losses			106.4	5.5			96.6	5.9		214.4	5.7			196.0	6.2
	Other income			―	―			0.1	―		―	―			0.1	―
	Direct expenses:
	Payroll and fringe benefit expense			-6.3	-0.3			-5.6	-0.3		-12.5	-0.3			-11.1	-0.4
	Other direct expenses			-7.5	-0.4			-6.7	-0.4		-14.7	-0.4			-13.6	-0.4
	Total direct expenses			-13.8	-0.7			-12.3	-0.7		-27.2	-0.7			-24.7	-0.8
	CarMax Auto Finance income		$	92.6	4.8		$	84.4	5.2	$	187.2	5.0		$	171.4	5.4
	Total average managed receivables		$	7,724.5			$	6,516.3		$	7,557.3			$	6,334.4
	(1)Annualized percentage of total average managed receivables.

Auto_Loan_Receivables

Auto Loan Receivables	6 Months Ended
	Aug. 31, 2014
Auto Loan Receivables [Abstract]	'
Auto Loan Receivables	'
	4.Auto Loan Receivables
	Auto loan receivables include amounts due from customers related to retail vehicle sales financed through CAF and are presented net of an allowance for estimated loan losses.  We use warehouse facilities to fund auto loan receivables originated by CAF until we elect to fund them through a term securitization or alternative funding arrangement.  The majority of the auto loan receivables serve as collateral for the related non-recourse notes payable of $7.91 billion as of August 31, 2014, and $7.25 billion as of February 28, 2014.  See Notes 2 and 10 for additional information on securitizations and non-recourse notes payable.
	Auto Loan Receivables, Net
		As of August 31			As of February 28
	(In millions)		2014			2014
	Warehouse facilities	$	1,045.0		$	879.0
	Term securitizations		6,603.3			6,145.5
	Other receivables (1)		242.7			159.9
	Total ending managed receivables		7,891.0			7,184.4
	Accrued interest and fees		31.8			26.3
	Other		-0.7			7.0
	Less allowance for loan losses		-77.8			-69.9
	Auto loan receivables, net	$	7,844.3		$	7,147.8
	(1)Other receivables includes receivables not funded through the warehouse facilities or term securitizations.
	Credit Quality.  When customers apply for financing, CAF’s proprietary scoring models rely on the customers’ credit history and certain application information to evaluate and rank their risk.  Credit histories are obtained from credit bureau reporting agencies and include information such as number, age, type and payment history for prior or existing credit accounts.  The application information that is used includes income, collateral value and down payment.  The scoring models yield credit grades that represent the relative likelihood of repayment.  Customers assigned a grade of “A” are determined to have the highest probability of repayment, and customers assigned a lower grade are determined to have a lower probability of repayment.  For loans that are approved, the credit grade influences the terms of the agreement, such as the required loan-to-value ratio and interest rate.
	CAF uses a combination of the initial credit grades and historical performance to monitor the credit quality of the auto loan receivables on an ongoing basis.  We validate the accuracy of the scoring models periodically.  Loan performance is reviewed on a recurring basis to identify whether the assigned grades adequately reflect the customers’ likelihood of repayment.
	Ending Managed Receivables by Major Credit Grade
				As of August 31			As of February 28
	(In millions)			2014 (1)		%  (2)		2014 (1)	%  (2)
	A		$	3,867.3		49.0	$	3,506.0	48.8
	B			2,884.9		36.6		2,658.5	37.0
	C and other			1,138.8		14.4		1,019.9	14.2
	Total ending managed receivables		$	7,891.0		100.0	$	7,184.4	100.0
	(1)Classified based on credit grade assigned when customers were initially approved for financing.
	(2)Percentage of total ending managed receivables.
	Allowance for Loan Losses
			Three Months Ended August 31							Six Months Ended August 31
	(In millions)			2014		%  (1)		2013	%  (1)		2014	%  (1)		2013	%  (1)
	Balance as of beginning of period		$	75.4		1.00	$	60.9	0.96	$	69.9	0.97	$	57.3	0.97
	Charge-offs			-36.9				-31.8			-68.9			-58.2
	Recoveries			18.9				18.8			40.6			37.5
	Provision for loan losses			20.4				18.0			36.2			29.3
	Balance as of end of period		$	77.8		0.99	$	65.9	0.99	$	77.8	0.99	$	65.9	0.99
	(1)Percentage of total ending managed receivables as of the corresponding reporting date.
	The allowance for loan losses represents an estimate of the amount of net losses inherent in our portfolio of managed receivables as of the applicable reporting date and anticipated to occur during the following 12 months.  The allowance is primarily based on the credit quality of the underlying receivables, historical loss trends and forecasted forward loss curves.  We also take into account recent trends in delinquencies and losses, recovery rates and the economic environment.  The provision for loan losses is the periodic expense of maintaining an adequate allowance.
	Past Due Receivables
				As of August 31			As of February 28
	(In millions)			2014		%  (1)	2014		%  (1)
	Total ending managed receivables		$	7,891.0		100.0	$	7,184.4	100.0
	Delinquent loans:
	31-60 days past due		$	150.0		1.9	$	126.6	1.8
	61-90 days past due			52.1		0.7		42.6	0.6
	Greater than 90 days past due			17.9		0.2		16.0	0.2
	Total past due		$	220.0		2.8	$	185.2	2.6
	(1)Percentage of total ending managed receivables.

Derivative_Instruments_And_Hed

Derivative Instruments And Hedging Activities	6 Months Ended
	Aug. 31, 2014
Derivative Instruments And Hedging Activities [Abstract]	'
Derivative Instruments And Hedging Activities	'
	5.Derivative Instruments and Hedging Activities
	Risk Management Objective of Using Derivatives.  We are exposed to certain risks arising from both our business operations and economic conditions, particularly with regard to future issuances of fixed-rate debt and existing and future issuances of floating-rate debt.  Primary exposures include LIBOR and other rates used as benchmarks in our securitizations.  We enter into derivative instruments to manage exposures that arise from business activities that result in the future known receipt or payment of uncertain cash amounts, the values of which are impacted by interest rates.  Our derivative instruments are used to manage differences in the amount of our known or expected cash receipts and our known or expected cash payments principally related to the funding of our auto loan receivables.
	We do not anticipate significant market risk from derivatives as they are predominantly used to match funding costs to the use of the funding.  However, disruptions in the credit or interest rate markets could impact the effectiveness of our hedging strategies.
	Credit risk is the exposure to nonperformance of another party to an agreement.  We mitigate credit risk by dealing with highly rated bank counterparties.
	Designated Cash Flow Hedges.  Our objectives in using interest rate derivatives are to add stability to CAF’s interest expense, to manage our exposure to interest rate movements and to better match funding costs to the interest received on the fixed-rate receivables being securitized.  To accomplish these objectives, we primarily use interest rate swaps that involve the receipt of variable amounts from a counterparty in exchange for our making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount.  These interest rate swaps are designated as cash flow hedges of forecasted interest payments in anticipation of permanent funding in the term securitization market.
	For derivatives that are designated and qualify as cash flow hedges, the effective portion of changes in the fair value is initially recorded in accumulated other comprehensive loss (“AOCL”) and is subsequently reclassified into CAF income in the period that the hedged forecasted transaction affects earnings.  The ineffective portion of the change in fair value of the derivatives is recognized directly in CAF income.  Amounts reported in AOCL related to derivatives will be reclassified to CAF income as interest expense is incurred on our future issuances of fixed-rate debt.  During the next 12 months, we estimate that an additional $11.0 million will be reclassified as a decrease to CAF income.
	As of August 31, 2014 and February 28, 2014 we had interest rate swaps outstanding with combined notional amounts of $1,021.0 million and $869.0 million, respectively, which were designated as cash flow hedges of interest rate risk.
	As of August 31, 2014 and February 28, 2014, we had no derivatives that were not designated as accounting hedges.
	Fair Values of Derivative Instruments
		As of August 31, 2014					As of February 28, 2014
	(In thousands)	Assets			Liabilities		Assets		Liabilities
	Derivatives designated as accounting hedges:
	Interest rate swaps (1)		$	94	$	―	$	―	$	―
	Interest rate swaps (2)		$	―	$	-1,211	$	―	$	-1,351
	Total		$	94	$	-1,211	$	―	$	-1,351
	(1)Reported in other current assets on the consolidated balance sheets.
	(2)Reported in accounts payable on the consolidated balance sheets.
	Effect of Derivative Instruments on Comprehensive Income
			Three Months Ended				Six Months Ended
			31-Aug				31-Aug
	(In thousands)		2014		2013		2014		2013
	Derivatives designated as accounting hedges:
	(Loss)/gain recognized in AOCL (1)		$	-271	$	2,890	$	-2,069	$	3,352
	Loss reclassified from AOCL into CAF income (1)		$	-2,076	$	-2,605	$	-4,339	$	-5,510
	Gain recognized in CAF Income (2)		$	―	$	57	$	―	$	78
	(1)Represents the effective portion.
	(2)Represents the ineffective portion.

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Aug. 31, 2014
Fair Value Measurements [Abstract]	'
Fair Value Measurements	'
	6.Fair Value Measurements
	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants in the principal market or, if none exists, the most advantageous market, for the specific asset or liability at the measurement date (referred to as the “exit price”).  The fair value should be based on assumptions that market participants would use, including a consideration of nonperformance risk.
	We assess the inputs used to measure fair value using the three-tier hierarchy.  The hierarchy indicates the extent to which inputs used in measuring fair value are observable in the market.
	Level 1Inputs include unadjusted quoted prices in active markets for identical assets or liabilities that we can access at the measurement date.
	Level 2Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly, including quoted prices for similar assets in active markets, quoted prices from identical or similar assets in inactive markets and observable inputs such as interest rates and yield curves.
	Level 3Inputs that are significant to the measurement that are not observable in the market and include management's judgments about the assumptions market participants would use in pricing the asset or liability (including assumptions about risk).
	Our fair value processes include controls that are designed to ensure that fair values are appropriate.  Such controls include model validation, review of key model inputs, analysis of period-over-period fluctuations and reviews by senior management.
	Valuation Methodologies
	Money Market Securities.  Money market securities are cash equivalents, which are included in either cash and cash equivalents or other assets, and consist of highly liquid investments with original maturities of three months or less.  We use quoted market prices for identical assets to measure fair value.  Therefore, all money market securities are classified as Level 1.
	Mutual Fund Investments.  Mutual fund investments consist of publicly traded mutual funds that primarily include diversified investments in large-, mid- and small-cap domestic and international companies.  The investments, which are included in other assets, are held in a rabbi trust established to fund informally our executive deferred compensation plan.  We use quoted active market prices for identical assets to measure fair value.  Therefore, all mutual fund investments are classified as Level 1.
	Derivative Instruments.  The fair values of our derivative instruments are included in either other current assets or accounts payable.  As described in Note 5, as part of our risk management strategy, we utilize derivative instruments to manage differences in the amount of our known or expected cash receipts and our known or expected cash payments principally related to the funding of our auto loan receivables.  Our derivatives are not exchange-traded and are over-the-counter customized derivative instruments.  All of our derivative exposures are with highly rated bank counterparties.
	We measure derivative fair values assuming that the unit of account is an individual derivative instrument and that derivatives are sold or transferred on a stand-alone basis.  We estimate the fair value of our derivatives using quotes determined by the derivative counterparties and third-party valuation services.  Quotes from third-party valuation services and quotes received from bank counterparties project future cash flows and discount the future amounts to a present value using market-based expectations for interest rates and the contractual terms of the derivative instruments.  The models do not require significant judgment and model inputs can typically be observed in the liquid market; however, because the models include inputs other than quoted prices in active markets, all derivatives are classified as Level 2.
	Our derivative fair value measurements consider assumptions about counterparty and our own nonperformance risk.  We monitor counterparty and our own nonperformance risk and, in the event that we determine that a party is unlikely to perform under terms of the contract, we would adjust the derivative fair value to reflect the nonperformance risk.
	Items Measured at Fair Value on a Recurring Basis
		As of August 31, 2014
	(In thousands)	Level 1			Level 2			Total
	Assets:
	Money market securities	$	370,384		$	―		$	370,384
	Mutual fund investments		8,726			―			8,726
	Derivative instruments		―			94			94
	Total assets at fair value	$	379,110		$	94		$	379,204
	Percentage of total assets at fair value		100.0	%		―	%		100.0	%
	Percentage of total assets		3.1	%		―	%		3.1	%
	Liabilities:
	Derivative instruments	$	―		$	1,211		$	1,211
	Total liabilities at fair value	$	―		$	1,211		$	1,211
	Percentage of total liabilities		―	%		―	%		―	%
		As of February 28, 2014
	(In thousands)	Level 1			Level 2			Total
	Assets:
	Money market securities	$	641,622		$	―		$	641,622
	Mutual fund investments		5,609			―			5,609
	Total assets at fair value	$	647,231		$	―		$	647,231
	Percentage of total assets at fair value		100.0	%		―	%		100.0	%
	Percentage of total assets		5.5	%		―	%		5.5	%
	Liabilities:
	Derivative instruments	$	―		$	1,351		$	1,351
	Total liabilities at fair value	$	―		$	1,351		$	1,351
	Percentage of total liabilities		―	%		―	%		―	%

Cancellation_Reserves

Cancellation Reserves	6 Months Ended
	Aug. 31, 2014
Cancellation Reserves [Abstract]	'
Cancellation Reserves	'
	7.Cancellation Reserves
	We recognize commission revenue for EPP products at the time of sale, net of a reserve for estimated contract cancellations.  Cancellations of these services may result from early termination by the customer, or default or prepayment on the finance contract.  The reserve for cancellations is evaluated for each product, and is based on forecasted forward cancellation curves utilizing historical experience, recent trends and credit mix of the customer base.
	Cancellation Reserves
		Three Months Ended August 31				Six Months Ended August 31, 2014
	(In millions)		2014		2013		2014		2013
	Balance as of beginning of period	$	81.1	$	33.3	$	72.5	$	32.7
	Cancellations		-12.5		-8.5		-25		-17
	Provision for future cancellations		17.4		9.2		38.5		18.3
	Balance as of end of period	$	86.0	$	34.0	$	86.0	$	34.0

Income_Taxes

Income Taxes	6 Months Ended
	Aug. 31, 2014
Income Taxes [Abstract]	'
Income Taxes	'
	8.Income Taxes
	We had $28.3 million of gross unrecognized tax benefits as of August 31, 2014, and $26.3 million as of February 28, 2014.  There were no significant changes to the gross unrecognized tax benefits as reported for the year ended February 28, 2014, as all activity was related to positions taken on tax returns filed or intended to be filed in the current fiscal year.

Benefit_Plans

Benefit Plans	6 Months Ended
	Aug. 31, 2014
Benefit Plans [Abstract]	'
Benefit Plans	'
	9.Retirement Plans
	Effective December 31, 2008, we froze both of our noncontributory defined benefit plans: our pension plan (the “pension plan”) and our unfunded, nonqualified plan (the “restoration plan”), which restores retirement benefits for certain associates who are affected by Internal Revenue Code limitations on benefits provided under the pension plan.  No additional benefits have accrued under these plans since that date.  In connection with benefits earned prior to December 31, 2008, we have a continuing obligation to fund the pension plan and will continue to recognize net periodic pension expense for both plans.  We use a fiscal year end measurement date for both the pension plan and the restoration plan.
	Components of Net Pension Expense
			Three Months Ended August 31
	(In thousands)		Pension Plan				Restoration Plan				Total
			2014		2013		2014		2013		2014		2013
	Interest cost	$	2,008	$	1,895	$	113	$	98	$	2,121	$	1,993
	Expected return on plan assets		-2,247		-1,978		―		―		-2,247		-1,978
	Recognized actuarial loss		340		429		―		―		340		429
	Net pension expense	$	101	$	346	$	113	$	98	$	214	$	444
			Six Months Ended August 31
	(In thousands)		Pension Plan				Restoration Plan				Total
			2014		2013		2014		2013		2014		2013
	Interest cost	$	4,016	$	3,791	$	226	$	197	$	4,242	$	3,988
	Expected return on plan assets		-4,514		-3,958		―		―		-4,514		-3,958
	Recognized actuarial loss		680		837		―		―		680		837
	Net pension expense	$	182	$	670	$	226	$	197	$	408	$	867
	We made $1.0 million in contributions to the pension plan during the six months ended August 31, 2014, and anticipate making $1.3 million in contributions during the remainder of fiscal 2015.  The expected long-term rate of return on plan assets for the pension plan was 7.75% as of February 28, 2014.

Debt

Debt	6 Months Ended
	Aug. 31, 2014
Debt [Abstract]	'
Debt	'
	10.Debt
			As of August 31		As of February 28
	(In thousands)	2014			2014
	Short-term revolving credit facility		$	2,229	$	582
	Current portion of finance and capital lease obligations			20,280		18,459
	Current portion of non-recourse notes payable			260,425		223,938
	Total current debt			282,934		242,979
	Finance and capital lease obligations, excluding current portion			310,689		315,925
	Non-recourse notes payable, excluding current portion			7,648,284		7,024,506
	Total debt, excluding current portion			7,958,973		7,340,431
	Total debt		$	8,241,907	$	7,583,410
	Revolving Credit Facility.  Our $700 million unsecured revolving credit facility (the “credit facility”) expires in August 2016.  Borrowings under the credit facility are available for working capital and general corporate purposes.  Borrowings accrue interest at variable rates based on LIBOR, the federal funds rate, or the prime rate, depending on the type of borrowing, and we pay a commitment fee on the unused portions of the available funds.  As of August 31, 2014, the unused capacity of approximately $698 million was fully available to us.
	Finance and Capital Lease Obligations.  Finance and capital lease obligations relate primarily to stores subject to sale-leaseback transactions that did not qualify for sale accounting, and therefore, are accounted for as financings.  The leases were structured at varying interest rates and generally have initial lease terms ranging from 15 to 20 years with payments made monthly.  Payments on the leases are recognized as interest expense and a reduction of the obligations.  We have not entered into any sale-leaseback transactions since fiscal 2009.
	Non-Recourse Notes Payable.  The non-recourse notes payable relate to auto loan receivables funded through term securitizations and our warehouse facilities.  The timing of principal payments on the non-recourse notes payable is based on principal collections, net of losses, on the securitized auto loan receivables.  The current portion of non-recourse notes payable represents principal payments that are due to be distributed in the following period.
	As of August 31, 2014, $6.86 billion of non-recourse notes payable was outstanding related to term securitizations.  These notes payable accrue interest at fixed rates and have scheduled maturities through February 2021, but may mature earlier or later, depending upon the repayment rate of the underlying auto loan receivables.
	As of August 31, 2014, $1.04 billion of non-recourse notes payable was outstanding related to our warehouse facilities.  The combined warehouse facility limit was $2.1 billion, and unused warehouse capacity totaled $1.06 billion.  In July 2014, we increased the combined limit of our warehouse facilities by an additional $300 million.  During the second quarter of fiscal 2015, we renewed our $800 million warehouse facility that was scheduled to expire in August 2014 for an additional 364-day term.  Of the combined warehouse facility limit, $1.3 billion will expire in February 2015 and $800 million will expire in July 2015.  The return requirements of the warehouse facility investors could fluctuate significantly depending on market conditions.  At renewal, the cost, structure and capacity of the facilities could change.  These changes could have a significant impact on our funding costs.
	See Notes 2 and 4 for additional information on the related securitized auto loan receivables.
	Financial Covenants. The credit facility agreement contains representations and warranties, conditions and covenants.  We must also meet financial covenants in conjunction with certain of the sale-leaseback transactions.  Our securitization agreements contain representations and warranties, financial covenants and performance triggers.  As of August 31, 2014, we were in compliance with all financial covenants and our securitized receivables were in compliance with the related performance triggers.

Stock_And_StockBased_Incentive

Stock And Stock-Based Incentive Plans	6 Months Ended
	Aug. 31, 2014
Stock And Stock-Based Incentive Plans [Abstract]	'
Stock And Stock-Based Incentive Plans	'
	11.Stock and Stock-Based Incentive Plans
	(A)Share Repurchase Program
	In fiscal 2013, our board of directors authorized the repurchase of up to $800 million of our common stock, and on April 4, 2014, we announced that they had authorized the repurchase of up to an additional $1 billion of our common stock.  During the quarter ended August 31, 2014, we exhausted the initial $800 million authorization and, as of August 31, 2014, $907.0  million was available for repurchase under the $1 billion authorization, which expires on December 31, 2015.
	For the three months ended August 31, 2014, we repurchased 4,024,801 shares of common stock at an average purchase price of $49.92 per share.  For the six months ended August 31, 2014, we repurchased 7,866,740 shares of common stock at an average purchase price of $47.68 per share. For the three months ended August 31, 2013, we repurchased 1,046,629 shares of common stock at an average purchase price of $46.54 per share. For the six months ended August 31, 2013, we purchased 3,992,251 shares of common stock at an average price of $43.40 per share.
	(B)Stock Incentive Plans
	We maintain long-term incentive plans for management, key employees and the nonemployee members of our board of directors.  The plans allow for the granting of equity-based compensation awards, including nonqualified stock options, incentive stock options, stock appreciation rights, restricted stock awards, stock- and cash-settled restricted stock units, stock grants or a combination of awards.  To date, we have not awarded any incentive stock options.
	The majority of associates who receive share-based compensation awards primarily receive cash-settled restricted stock units.  Senior management and other key associates receive awards of nonqualified stock options and stock-settled restricted stock units.  Nonemployee directors receive awards of nonqualified stock options, stock grants and/or restricted stock awards.  Excluding stock grants, all share-based compensation awards, including any associated dividend rights, are subject to forfeiture.
	Nonqualified Stock Options.  Nonqualified stock options are awards that allow the recipient to purchase shares of our common stock at a fixed price.  Stock options are granted at an exercise price equal to the fair market value of our common stock on the grant date.  The stock options generally vest annually in equal amounts over periods of one to four years.  These options  expire no later than ten years after the date of the grant.
	Cash-Settled Restricted Stock Units.  Also referred to as restricted stock units, or RSUs, these are awards that entitle the holder to a cash payment equal to the fair market value of a share of our common stock for each unit granted.  Conversion generally occurs at the end of a three-year vesting period.  However, the cash payment per RSU will not be greater than 200% or less than 75% of the fair market value of a share of our common stock on the grant date.  RSUs are liability awards and do not have voting rights.
	Stock-Settled Restricted Stock Units.  Also referred to as market stock units, or MSUs, these are awards to eligible key associates that are converted into between zero and two shares of common stock for each unit granted.  Conversion generally occurs at the end of a three-year vesting period.  The conversion ratio is calculated by dividing the average closing price of our stock during the final forty trading days of the three-year vesting period by our stock price on the grant date, with the resulting quotient capped at two.  This quotient is then multiplied by the number of MSUs granted to yield the number of shares awarded.  MSUs  do not have voting rights.
	Restricted Stock Awards.  Restricted stock awards (RSAs) are awards of our common stock that are subject to specified restrictions that lapse one year from the grant date.  Participants holding RSAs are entitled to vote on matters submitted to holders of our common stock for a vote.  During the six months ended August 31, 2014, we granted to our board of directors RSAs of 22,860 shares at a fair value per share on the grant date of $51.18.  No RSAs were outstanding during the six months ended August 31, 2013.  The unrecognized compensation costs related to nonvested RSAs totaled $0.2 million as of August 31, 2014.  These costs are expected to be recognized on a straight-line basis over a weighted average period of 0.8 years.
	(C)Share-Based Compensation
	Composition of Share-Based Compensation Expense
			Three Months Ended						Six Months Ended
			31-Aug						31-Aug
	(In thousands)		2014			2013			2014			2013
	Cost of sales		$	1,247		$	586		$	1,574		$	1,859
	CarMax Auto Finance income			961			730			1,637			1,512
	Selling, general and administrative expenses			20,493			14,063			35,209			35,237
	Share-based compensation expense, before income taxes		$	22,701		$	15,379		$	38,420		$	38,608
	Composition of Share-Based Compensation Expense – By Grant Type
			Three Months Ended						Six Months Ended
			31-Aug						31-Aug
	(In thousands)		2014			2013			2014			2013
	Nonqualified stock options		$	6,887		$	5,786		$	15,007		$	12,819
	Cash-settled restricted stock units			11,074			5,884			14,221			17,972
	Stock-settled restricted stock units			3,472			2,891			7,593			6,711
	Employee stock purchase plan			311			318			642			606
	Restricted stock awards to non-employee directors			957			―			957			―
	Stock grants to non-employee directors			―			500			―			500
	Share-based compensation expense, before income taxes		$	22,701		$	15,379		$	38,420		$	38,608
	We recognize compensation expense for stock options, MSUs and RSAs on a straight-line basis (net of estimated forfeitures) over the requisite service period, which is generally the vesting period of the award.  The variable expense associated with RSUs is recognized over their vesting period (net of estimated forfeitures) and is calculated based on the volume-weighted average price of our common stock on the last trading day of each reporting period.  The total costs for matching contributions for our employee stock purchase plan are included in share-based compensation expense.  There were no capitalized share-based compensation costs as of or for the six months ended August 31, 2014 or 2013.
	Stock Option Activity
									Weighted
									Average
					Weighted				Remaining				Aggregate
		Number of			Average				Contractual				Intrinsic
	(Shares and intrinsic value in thousands)	Shares			Exercise Price				Life (Years)				Value
	Outstanding as of February 28, 2014		10,018		$	27.02
	Options granted		2,003			44.96
	Options exercised		-2,591			17.09
	Options forfeited or expired		-16			32.69
	Outstanding as of August 31, 2014		9,414		$	33.56				4.4			$	177,333
	Exercisable as of August 31, 2014		4,979		$	27.40				3.3			$	124,494
	During the six months ended August 31, 2014 and 2013, we granted nonqualified options to purchase 2,003,238 and 1,601,699 shares of common stock, respectively.  The total cash received as a result of stock option exercises for the six months ended August 31, 2014 and 2013, was $44.3 million and $20.8 million, respectively.  We settle stock option exercises with authorized but unissued shares of our common stock.  The total intrinsic value of options exercised for the six months ended August 31, 2014 and 2013, was $85.9 million and $29.5 million, respectively.  We realized related tax benefits of $34.6 million and $11.8 million during the six months ended August 31, 2014 and 2013, respectively.
	Outstanding Stock Options
							As of August 31, 2014
							Options Outstanding								Options Exercisable
										Weighted
										Average			Weighted				Weighted
										Remaining			Average				Average
	(Shares in thousands)						Number of			Contractual			Exercise		Number of		Exercise
	Range of Exercise Prices						Shares			Life (Years)			Price		Shares		Price
	$	11.43						554			1.6		$	11.43		554	$	11.43
	$	13.19	-	$	19.82			488			0.9		$	15.57		488	$	15.57
	$	19.98	-	$	25.39			1,288			2.7		$	25.19		1,288	$	25.19
	$	28.81	-	$	32.69			3,511			4.2		$	32.12		2,181	$	32.22
	$	33.11	-	$	49.25			3,573			6.1		$	43.89		468	$	42.21
	Total							9,414			4.4		$	33.56		4,979	$	27.40
	For stock options, the fair value of each award is estimated as of the date of grant using a binomial valuation model.  In computing the value of the option, the binomial model considers characteristics of fair-value option pricing that are not available for consideration under a closed-form valuation model (for example, the Black-Scholes model), such as the contractual term of the option, the probability that the option will be exercised prior to the end of its contractual life and the probability of termination or retirement of the option holder.  For this reason, we believe that the binomial model provides a fair value that is more representative of actual experience and future expected experience than the value calculated using a closed-form model.  Estimates of fair value are not intended to predict actual future events or the value ultimately realized by the recipients of share-based awards.
	The weighted average fair value per share at the date of grant for options granted during the six months ended August 31, 2014 and 2013, was $13.21 and $15.59, respectively.  The unrecognized compensation costs related to nonvested options totaled $43.7 million as of August 31, 2014.  These costs are expected to be recognized on a straight-line basis over a weighted average period of 2.5 years.
	Assumptions Used to Estimate Option Values
			Six Months Ended August 31
		2014						2013
Dividend yield					0.0	%					0.0	%
Expected volatility factor (1)		25.2	%	-	32.7	%		28.1	%	-	46.8	%
Weighted average expected volatility					31.9	%					44.7	%
Risk-free interest rate (2)		0.03	%	-	2.7	%		0.02	%	-	2.6	%
Expected term (in years) (3)					4.7						4.7
(1)Measured using historical daily price changes of our stock for a period corresponding to the term of the options and the implied volatility derived from the market prices of traded options on our stock.
(2)Based on the U.S. Treasury yield curve in effect at the time of grant.
(3)Represents the estimated number of years that options will be outstanding prior to exercise.
Cash-Settled Restricted Stock Unit Activity
				Weighted
				Average
		Number of		Grant Date
(Units in thousands)		Units		Fair Value
Outstanding as of February 28, 2014		1,531		$	35.68
Stock units granted		588		$	44.96
Stock units vested and converted		-463		$	32.77
Stock units cancelled		-65		$	38.86
Outstanding as of August 31, 2014		1,591		$	39.82
During the six months ended August 31, 2014 and 2013, we granted 587,511 and 541,819 RSUs, respectively.  The initial fair market value per RSU at the date of grant for the RSUs granted during the six months ended August 31, 2014 and 2013, was $44.96 and $42.68, respectively.  The RSUs are cash-settled upon vesting.  During the six months ended August 31, 2014 we paid $21.2 million and $23.0 million, respectively (before payroll tax withholdings), to RSU holders upon the vesting of RSUs.  We realized tax benefits of $8.6 million and $9.2 million during the six months ended August 31, 2014 and 2013, respectively.
Expected Cash Settlement Range Upon Restricted Stock Unit Vesting
		As of August 31, 2014
(In thousands)		Minimum (1)			Maximum (1)
Fiscal 2016		$	12,376		$	33,003
Fiscal 2017			14,100			37,600
Fiscal 2018			16,285			43,428
Total expected cash settlements		$	42,761		$	114,031
(1)Net of estimated forfeitures.
Stock-Settled Restricted Stock Unit Activity
				Weighted
				Average
		Number of		Grant Date
(Units in thousands)		Units		Fair Value
Outstanding as of February 28, 2014		852		$	45.26
Stock units granted		245		$	55.37
Stock units vested and converted		-289		$	45.65
Stock units cancelled		―		$	―
Outstanding as of August 31, 2014		808		$	48.18
During the six months ended August 31, 2014 and 2013, we granted 245,190 and 236,675 MSUs, respectively.  The weighted average fair value per MSU at the date of grant for MSUs granted during the six months ended August 31, 2014 and 2013, was $55.37 and $51.98, respectively.  The fair values were determined using a Monte-Carlo simulation and were based on the expected market price of our common stock on the vesting date and the expected number of converted common shares.  We realized related tax benefits of $7.4 million and $6.7 million for the six months ended August 31, 2014 and 2013, respectively, from the vesting of market stock units.  The unrecognized compensation costs related to nonvested MSUs totaled $19.0 million as of August 31, 2014.  These costs are expected to be recognized on a straight-line basis over a weighted average period of 1.4 years.

Net_Earnings_Per_Share

Net Earnings Per Share	6 Months Ended
	Aug. 31, 2014
Net Earnings Per Share [Abstract]	'
Net Earnings Per Share	'
	12.Net Earnings per Share
	Basic net earnings per share is computed by dividing net earnings available for basic common shares by the weighted average number of shares of common stock outstanding.  Diluted net earnings per share is computed by dividing net earnings available for diluted common shares by the sum of weighted average number of shares of common stock outstanding and dilutive potential common  stock.
	Basic and Dilutive Net Earnings Per Share Reconciliations
		Three Months Ended				Six Months Ended
		31-Aug				31-Aug
	(In thousands except per share data)	2014		2013		2014		2013
	Net earnings	$	154,518	$	140,274	$	324,171	$	286,925
	Weighted average common shares outstanding		218,180		223,610		219,224		224,114
	Dilutive potential common shares:
	Stock options		2,269		3,319		2,520		3,257
	Stock-settled restricted stock units and awards		621		705		607		722
	Weighted average common shares and dilutive
	potential common shares		221,070		227,634		222,351		228,093
	Basic net earnings per share	$	0.71	$	0.63	$	1.48	$	1.28
	Diluted net earnings per share	$	0.70	$	0.62	$	1.46	$	1.26
	Certain weighted-average options to purchase shares of common stock were outstanding and not included in the calculation of diluted net earnings per share because their inclusion would have been antidilutive.  For the three months ended August 31, 2014 and 2013, weighted-average options to purchase 2,885,903 shares and 1,426,163 shares of common stock, respectively, were not included.  For the six months ended August 31, 2014 and 2013, weighted-average options to purchase 2,586,357 shares and 1,073,635 shares respectively, were not included.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	6 Months Ended
	Aug. 31, 2014
Accumulated Other Comprehensive Loss [Abstract]	'
Accumulated Other Comprehensive Loss	'
	13.Accumulated Other Comprehensive Loss
	Changes in Accumulated Other Comprehensive Loss by Component
										Total
			Net							Accumulated
			Unrecognized				Net			Other
			Actuarial				Unrecognized			Comprehensive
	(In thousands, net of income taxes)		Losses				Hedge Losses			Loss
	Balance as of February 28, 2014		$	-38,715			$	-7,556		$	-46,271
	Other comprehensive loss before reclassifications			―				-1,255			-1,255
	Amounts reclassified from accumulated other comprehensive loss			426				2,633			3,059
	Other comprehensive income			426				1,378			1,804
	Balance as of August 31, 2014		$	-38,289			$	-6,178		$	-44,467
	Changes In and Reclassifications Out of Accumulated Other Comprehensive Loss
			Three Months Ended August 31				Six Months Ended August 31
	(In thousands)		2014		2013		2014		2013
	Retirement Benefit Plans (Note 9):
	Actuarial loss amortization reclassifications recognized
	in net pension expense:
	Cost of sales	$	138	$	172	$	276	$	334
	CarMax Auto Finance income		8		10		15		19
	Selling, general and administrative expenses		194		247		389		484
	Total amortization reclassifications recognized
	in net pension expense		340		429		680		837
	Tax expense		-127		-159		-254		-311
	Amortization reclassifications recognized in net
	pension expense, net of tax		213		270		426		526
	Net change in retirement benefit plan unrecognized
	actuarial losses, net of tax		213		270		426		526
	Cash Flow Hedges (Note 5):
	Effective portion of changes in fair value		-271		2,890		-2,069		3,352
	Tax benefit/(expense)		107		-1,139		814		-1,320
	Effective portion of changes in fair value, net of tax		-164		1,751		-1,255		2,032
	Reclassifications to CarMax Auto Finance income		2,076		2,605		4,339		5,510
	Tax expense		-816		-1,025		-1,706		-2,169
	Reclassification of hedge losses, net of tax		1,260		1,580		2,633		3,341
	Net change in cash flow hedge unrecognized losses,
	net of tax		1,096		3,331		1,378		5,373
	Total other comprehensive income, net of tax	$	1,309	$	3,601	$	1,804	$	5,899
	Changes in the funded status of our retirement plans and the effective portion of changes in the fair value of derivatives that are designated and qualify as cash flow hedges are recognized in accumulated other comprehensive loss.  The cumulative balances are net of deferred taxes of $26.5 million as of August 31, 2014, and $27.7 million as of February 28, 2014.

Commitments_And_Contingencies

Commitments And Contingencies	6 Months Ended
	Aug. 31, 2014
Commitments And Contingencies [Abstract]	'
Commitments And Contingencies	'
	14.Contingent Liabilities
	Litigation.  On April 2, 2008, Mr. John Fowler filed a putative class action lawsuit against CarMax Auto Superstores California, LLC and CarMax Auto Superstores West Coast, Inc. in the Superior Court of California, County of Los Angeles.  Subsequently, two other lawsuits, Leena Areso et al. v.  CarMax Auto Superstores California, LLC and Justin Weaver v. CarMax Auto Superstores California, LLC, were consolidated as part of the Fowler case.  The allegations in the consolidated case involved: (1) failure to provide meal and rest breaks or compensation in lieu thereof; (2) failure to pay wages of terminated or resigned employees related to meal and rest breaks and overtime; (3) failure to pay overtime; (4) failure to comply with itemized employee wage statement provisions; (5) unfair competition; and (6) California’s Labor Code Private Attorney General Act.  The putative class consisted of sales consultants, sales managers, and other hourly employees who worked for the company in California from April 2, 2004, to the present.  On May 12, 2009, the court dismissed all of the class claims with respect to the sales manager putative class.  On June 16, 2009, the court dismissed all claims related to the failure to comply with the itemized employee wage statement provisions.  The court also granted CarMax’s motion for summary adjudication with regard to CarMax’s alleged failure to pay overtime to the sales consultant putative class.  The plaintiffs appealed the court's ruling regarding the sales consultant overtime claim.  On May 20, 2011, the California Court of Appeal affirmed the ruling in favor of CarMax.  The plaintiffs filed a Petition of Review with the California Supreme Court, which was denied.  As a result, the plaintiffs’ overtime claims are no longer a part of the lawsuit.
	The claims currently remaining in the lawsuit regarding the sales consultant putative class are: (1) failure to provide meal and rest breaks or compensation in lieu thereof; (2) failure to pay wages of terminated or resigned employees related to meal and rest breaks; (3) unfair competition; and (4) California’s Labor Code Private Attorney General Act.  On June 16, 2009, the court entered a stay of these claims pending the outcome of a California Supreme Court case involving unrelated third parties but related legal issues.  Subsequently, CarMax moved to lift the stay and compel the plaintiffs’ remaining claims into arbitration on an individual basis, which the court granted on November 21, 2011.  The plaintiffs appealed the court’s ruling to the California Court of Appeal.  On March 26, 2013, the California Court of Appeal reversed the trial court's order granting CarMax's motion to compel arbitration.  On October 8, 2013, CarMax filed a petition for a writ of certiorari seeking review in the United States Supreme Court.  On February 24, 2014, the United States Supreme Court granted CarMax's petition for certiorari, vacated the California Court of Appeal decision and remanded the case to the California Court of Appeal for further consideration.  The Fowler lawsuit seeks compensatory and special damages, wages, interest, civil and statutory penalties, restitution, injunctive relief and the recovery of attorneys’ fees.  We are unable to make a reasonable estimate of the amount or range of loss that could result from an unfavorable outcome in these matters.
	We are involved in various other legal proceedings in the normal course of business.  Based upon our evaluation of information currently available, we believe that the ultimate resolution of any such proceedings will not have a material effect, either individually or in the aggregate, on our financial condition, results of operations or cash flows.
	Gain Contingency.  The Company is a class member in a consolidated and settled class action lawsuit (In Re Toyota Motor Corp. Unintended Acceleration Marketing, Sales Practices, and Products Liability Litig., Case No. 10-2151 (C.D. Cal.), consolidated as of April 9, 2010) against Toyota Motor Corp. and Toyota Motor Sales, USA, Inc. (collectively, “Toyota”) related to the economic loss associated with certain Toyota vehicles equipped with electronic throttle controls systems and the potential unintended acceleration of these vehicles.  On July 9, 2014, we received $20.9 million in the settlement of this matter and recorded the gain at the time of receipt.

Summary_Of_Significant_Account1

Summary Of Significant Accounting Policies (Policy)	6 Months Ended
	Aug. 31, 2014
Summary Of Significant Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation and Use of Estimates.  The accompanying interim unaudited consolidated financial statements include the accounts of CarMax and our wholly owned subsidiaries.  All significant intercompany balances and transactions have been eliminated in consolidation.  These consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) for interim financial information.  Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements.  In the opinion of management, such interim consolidated financial statements reflect all normal recurring adjustments considered necessary to present fairly the financial position and the results of operations and cash flows for the interim periods presented.  The results of operations for the interim periods are not necessarily indicative of the results to be expected for the full fiscal year.  These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and footnotes included in our Annual Report on Form 10-K for the fiscal year ended
	February 28, 2014.
Use Of Estimates	'
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities.  Actual results could differ from those estimates.  Certain prior year amounts have been reclassified to conform to current year’s presentation.  Amounts and percentages may not total due to rounding.
Cash And Cash Equivalents	'
	Cash and Cash Equivalents.  Cash equivalents of $327.0 million as of August 31, 2014, and $607.0 million as of February 28, 2014, consisted of highly liquid investments with original maturities of three months or less.
Restricted Cash From Collections On Auto Loan Receivables	'
	Restricted Cash from Collections on Auto Loan Receivables.  Cash accounts totaling $297.1 million as of August 31, 2014, and $259.3 million as of February 28, 2014, consisted of collections of principal and interest payments on securitized auto loan receivables that are restricted for payment to the securitization investors pursuant to the applicable securitization agreements.
Securitizations	'
	Securitizations.  We maintain a revolving securitization program composed of two warehouse facilities (“warehouse facilities”) that we use to fund auto loan receivables originated by CAF until we elect to fund them through a term securitization or alternative funding arrangement.  We sell the auto loan receivables to a wholly owned, bankruptcy-remote, special purpose entity that transfers an undivided percentage ownership interest in the receivables, but not the receivables themselves, to entities formed by third-party investors.  These entities issue asset-backed commercial paper or utilize other funding sources supported by the transferred receivables, and the proceeds are used to finance the securitized receivables.
	We typically use term securitizations to provide long-term funding for most of the auto loan receivables initially securitized through the warehouse facilities.  In these transactions, a pool of auto loan receivables is sold to a bankruptcy-remote, special purpose entity that, in turn, transfers the receivables to a special purpose securitization trust.  The securitization trust issues asset-backed securities, secured or otherwise supported by the transferred receivables, and the proceeds from the sale of the asset-backed securities are used to finance the securitized receivables.
	We are required to evaluate term securitization trusts for consolidation.  In our capacity as servicer, we have the power to direct the activities of the trusts that most significantly impact the economic performance of the trusts.  In addition, we have the obligation to absorb losses (subject to limitations) and the rights to receive any returns of the trusts, which could be significant.  Accordingly, we are the primary beneficiary of the trusts and are required to consolidate them.
	We recognize transfers of auto loan receivables into the warehouse facilities and term securitizations (“securitization vehicles”) as secured borrowings, which result in recording the auto loan receivables and the related non-recourse notes payable to the investors on our consolidated balance sheets.
	The securitized receivables can only be used as collateral to settle obligations of the securitization vehicles.  The securitization vehicles and investors have no recourse to our assets beyond the securitized receivables, the amounts on deposit in reserve accounts and the restricted cash from collections on auto loan receivables.  We have not provided financial or other support to the securitization vehicles that was not previously contractually required, and there are no additional arrangements, guarantees or other commitments that could require us to provide financial support to the securitization vehicles.
	See Notes 4 and 10 for additional information on auto loan receivables and non-recourse notes payable.
Auto Loan Receivables, Net	'
	Auto Loan Receivables, Net.  Auto loan receivables include amounts due from customers related to retail vehicle sales financed through CAF.  The receivables are presented net of an allowance for estimated loan losses.  The allowance for loan losses represents an estimate of the amount of net losses inherent in our portfolio of managed receivables as of the applicable reporting date and anticipated to occur during the following 12 months.  The allowance is primarily based on the credit quality of the underlying receivables, historical loss trends and forecasted forward loss curves.  We also take into account recent trends in delinquencies and losses, recovery rates and the economic environment.  The provision for loan losses is the periodic expense of maintaining an adequate allowance.
	An account is considered delinquent when the related customer fails to make a substantial portion of a scheduled payment on or before the due date.  In general, accounts are charged-off on the last business day of the month during which the earliest of the following occurs:  the receivable is 120 days or more delinquent as of the last business day of the month, the related vehicle is repossessed and liquidated, or the receivable is otherwise deemed uncollectible.  For purposes of determining impairment, auto loans are evaluated collectively, as they represent a large group of smaller-balance homogeneous loans, and therefore, are not individually evaluated for impairment.  See Note 4 for additional information on auto loan receivables.
	Interest income and expenses related to auto loans are included in CAF income.  Interest income on auto loan receivables is recognized when earned based on contractual loan terms.  All loans continue to accrue interest until repayment or charge‑off.  Direct costs associated with loan originations are not considered material, and thus, are expensed as incurred.  See Note 3 for additional information on CAF income.
Property And Equipment	'
	Property and Equipment, Net.  Property and equipment is reported net of accumulated depreciation and amortization of $778.7 million and $730.6 million as of August 31, 2014 and February 28, 2014, respectively.
Other Assets Restricted	'
	Other Assets.  Other assets includes amounts classified as restricted cash on deposit in reserve accounts and restricted investments.  The restricted cash on deposit in reserve accounts is for the benefit of holders of non-recourse notes payable, and these funds are not expected to be available to the company or its creditors.  In the event that the cash generated by the securitized receivables in a given period was insufficient to pay the interest, principal and other required payments, the balances on deposit in the reserve accounts would be used to pay those amounts.  Restricted cash on deposit in reserve accounts was $37.5 million as of August 31, 2014, and $32.5 million as of February 28, 2014.
	Restricted investments includes money market securities primarily held to satisfy certain insurance program requirements, as well as investments held in a rabbi trust established to fund informally our executive deferred compensation plan.  The rabbi trust investments are classified as trading securities with realized and unrealized gains and losses reflected as a component of other expense.  Restricted investments was $52.1 million as of August 31, 2014, and $40.2 million as of February 28, 2014.
Revenue Recognition	'
	Revenue Recognition.    We recognize revenue when the earnings process is complete, generally either at the time of sale to a customer or upon delivery to a customer.  As part of our customer service strategy, we guarantee the retail vehicles we sell with a 5‑day, money-back guarantee.  We record a reserve for estimated returns based on historical experience and trends.
	We sell EPP products on behalf of unrelated third parties to customers who purchase a vehicle.  In May 2014, the ESPs we offer on all used vehicles were modified to provide coverage of 60 months (subject to mileage limitations).  Prior to this modification, the ESPs we offered provided coverage up to 72 months.  GAP covers the customer for the term of their finance contract. We recognize commission revenue at the time of sale, net of a reserve for estimated customer cancellations.  Periodically, we may receive additional commissions based upon the level of underwriting profits of the third parties who administer the products.  These additional commissions are recognized as revenue when received.  The reserve for cancellations is evaluated for each product, and is based on forecasted forward cancellation curves utilizing historical experience, recent trends and credit mix of the customer base.  Our risk related to customer cancellations is limited to the commissions that we receive.  Cancellations fluctuate depending on the volume of EPP sales, customer financing default or prepayment rates, and shifts in customer behavior, including those related to changes in the coverage or term of the product.  The current portion of estimated cancellation reserves is recognized as a component of other current liabilities with the remaining amount recognized in other liabilities.  See Note 7 for additional information on cancellation reserves.
	Customers applying for financing who are not approved by CAF may be evaluated by other financial institutions.  Depending on the credit profile of the customer, third-party finance providers generally either pay us or are paid a fixed, pre-negotiated fee per contract.  We recognize these fees at the time of sale.
	We collect sales taxes and other taxes from customers on behalf of governmental authorities at the time of sale.  These taxes are accounted for on a net basis and are not included in net sales and operating revenues or cost of sales.
Derivative Instruments And Hedging Activities	'
	Derivative Instruments and Hedging Activities.  We enter into derivative instruments to manage exposures that arise from business activities that result in the future known receipt or payment of uncertain cash amounts, the values of which are impacted by interest rates.  We recognize the derivatives at fair value as either current assets or current liabilities on the consolidated balance sheets, and where applicable, such contracts covered by master netting agreements are reported net.  Gross positive fair values are netted with gross negative fair values by counterparty.  The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting, and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting.  We may enter into derivative contracts that are intended to economically hedge certain risks, even though hedge accounting may not apply or we do not elect to apply hedge accounting.  See Note 5 for additional information on derivative instruments and hedging activities.

CarMax_Auto_Finance_Income_Tab

CarMax Auto Finance Income (Tables)	6 Months Ended
	Aug. 31, 2014
CarMax Auto Finance Income [Abstract]	'
Components Of CarMax Auto Finance Income	'
		Three Months Ended August 31								Six Months Ended August 31
	(In millions)	2014			%  (1)	2013			% (1)	2014		%  (1)	2013			% (1)
	Interest margin:
	Interest and fee income		$	150.7	7.8		$	137.2	8.4	$	297.6	7.9		$	270.7	8.5
	Interest expense			-23.9	-1.2			-22.6	-1.4		-47	-1.2			-45.4	-1.4
	Total interest margin			126.8	6.6			114.6	7.0		250.6	6.6			225.3	7.1
	Provision for loan losses			-20.4	-1.1			-18	-1.1		-36.2	-1			-29.3	-0.9
	Total interest margin after
	provision for loan losses			106.4	5.5			96.6	5.9		214.4	5.7			196.0	6.2
	Other income			―	―			0.1	―		―	―			0.1	―
	Direct expenses:
	Payroll and fringe benefit expense			-6.3	-0.3			-5.6	-0.3		-12.5	-0.3			-11.1	-0.4
	Other direct expenses			-7.5	-0.4			-6.7	-0.4		-14.7	-0.4			-13.6	-0.4
	Total direct expenses			-13.8	-0.7			-12.3	-0.7		-27.2	-0.7			-24.7	-0.8
	CarMax Auto Finance income		$	92.6	4.8		$	84.4	5.2	$	187.2	5.0		$	171.4	5.4
	Total average managed receivables		$	7,724.5			$	6,516.3		$	7,557.3			$	6,334.4
	(1)Annualized percentage of total average managed receivables.

Auto_Loan_Receivables_Tables

Auto Loan Receivables (Tables)	6 Months Ended
	Aug. 31, 2014
Auto Loan Receivables [Abstract]	'
Auto Loan Receivables, Net	'
		As of August 31			As of February 28
	(In millions)		2014			2014
	Warehouse facilities	$	1,045.0		$	879.0
	Term securitizations		6,603.3			6,145.5
	Other receivables (1)		242.7			159.9
	Total ending managed receivables		7,891.0			7,184.4
	Accrued interest and fees		31.8			26.3
	Other		-0.7			7.0
	Less allowance for loan losses		-77.8			-69.9
	Auto loan receivables, net	$	7,844.3		$	7,147.8
	(1)Other receivables includes receivables not funded through the warehouse facilities or term securitizations.
Ending Managed Receivables By Major Credit Grade	'
				As of August 31			As of February 28
	(In millions)			2014 (1)		%  (2)		2014 (1)	%  (2)
	A		$	3,867.3		49.0	$	3,506.0	48.8
	B			2,884.9		36.6		2,658.5	37.0
	C and other			1,138.8		14.4		1,019.9	14.2
	Total ending managed receivables		$	7,891.0		100.0	$	7,184.4	100.0
	(1)Classified based on credit grade assigned when customers were initially approved for financing.
	(2)Percentage of total ending managed receivables.
Allowance For Loan Losses	'
			Three Months Ended August 31							Six Months Ended August 31
	(In millions)			2014		%  (1)		2013	%  (1)		2014	%  (1)		2013	%  (1)
	Balance as of beginning of period		$	75.4		1.00	$	60.9	0.96	$	69.9	0.97	$	57.3	0.97
	Charge-offs			-36.9				-31.8			-68.9			-58.2
	Recoveries			18.9				18.8			40.6			37.5
	Provision for loan losses			20.4				18.0			36.2			29.3
	Balance as of end of period		$	77.8		0.99	$	65.9	0.99	$	77.8	0.99	$	65.9	0.99
	(1)Percentage of total ending managed receivables as of the corresponding reporting date.
Past Due Receivables	'
				As of August 31			As of February 28
	(In millions)			2014		%  (1)	2014		%  (1)
	Total ending managed receivables		$	7,891.0		100.0	$	7,184.4	100.0
	Delinquent loans:
	31-60 days past due		$	150.0		1.9	$	126.6	1.8
	61-90 days past due			52.1		0.7		42.6	0.6
	Greater than 90 days past due			17.9		0.2		16.0	0.2
	Total past due		$	220.0		2.8	$	185.2	2.6
	(1)Percentage of total ending managed receivable

Derivative_Instruments_And_Hed1

Derivative Instruments And Hedging Activities (Tables)	6 Months Ended
	Aug. 31, 2014
Derivative Instruments And Hedging Activities [Abstract]	'
Fair Values Of Derivative Instruments On The Consolidated Balance Sheets	'
		As of August 31, 2014					As of February 28, 2014
	(In thousands)	Assets			Liabilities		Assets		Liabilities
	Derivatives designated as accounting hedges:
	Interest rate swaps (1)		$	94	$	―	$	―	$	―
	Interest rate swaps (2)		$	―	$	-1,211	$	―	$	-1,351
	Total		$	94	$	-1,211	$	―	$	-1,351
	(1)Reported in other current assets on the consolidated balance sheets.
	(2)Reported in accounts payable on the consolidated balance sheets.
Schedule Of Effect Of Derivative Instruments On The Consolidated Statements Of Earnings	'
			Three Months Ended				Six Months Ended
			31-Aug				31-Aug
	(In thousands)		2014		2013		2014		2013
	Derivatives designated as accounting hedges:
	(Loss)/gain recognized in AOCL (1)		$	-271	$	2,890	$	-2,069	$	3,352
	Loss reclassified from AOCL into CAF income (1)		$	-2,076	$	-2,605	$	-4,339	$	-5,510
	Gain recognized in CAF Income (2)		$	―	$	57	$	―	$	78
	(1)Represents the effective portion.
	(2)Represents the ineffective portion.

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Aug. 31, 2014
Fair Value Measurements [Abstract]	'
Schedule Of Items Measured At Fair Value On A Recurring Basis	'
	Items Measured at Fair Value on a Recurring Basis
		As of August 31, 2014
	(In thousands)	Level 1			Level 2			Total
	Assets:
	Money market securities	$	370,384		$	―		$	370,384
	Mutual fund investments		8,726			―			8,726
	Derivative instruments		―			94			94
	Total assets at fair value	$	379,110		$	94		$	379,204
	Percentage of total assets at fair value		100.0	%		―	%		100.0	%
	Percentage of total assets		3.1	%		―	%		3.1	%
	Liabilities:
	Derivative instruments	$	―		$	1,211		$	1,211
	Total liabilities at fair value	$	―		$	1,211		$	1,211
	Percentage of total liabilities		―	%		―	%		―	%
		As of February 28, 2014
	(In thousands)	Level 1			Level 2			Total
	Assets:
	Money market securities	$	641,622		$	―		$	641,622
	Mutual fund investments		5,609			―			5,609
	Total assets at fair value	$	647,231		$	―		$	647,231
	Percentage of total assets at fair value		100.0	%		―	%		100.0	%
	Percentage of total assets		5.5	%		―	%		5.5	%
	Liabilities:
	Derivative instruments	$	―		$	1,351		$	1,351
	Total liabilities at fair value	$	―		$	1,351		$	1,351
	Percentage of total liabilities		―	%		―	%		―	%

Cancellation_Reserves_Tables

Cancellation Reserves (Tables)	6 Months Ended
	Aug. 31, 2014
Cancellation Reserves [Abstract]	'
Schedule Of Cancellation Reserves Accrual	'
		Three Months Ended August 31				Six Months Ended August 31, 2014
	(In millions)		2014		2013		2014		2013
	Balance as of beginning of period	$	81.1	$	33.3	$	72.5	$	32.7
	Cancellations		-12.5		-8.5		-25		-17
	Provision for future cancellations		17.4		9.2		38.5		18.3
	Balance as of end of period	$	86.0	$	34.0	$	86.0	$	34.0

Benefit_Plans_Tables

Benefit Plans (Tables)	3 Months Ended													6 Months Ended
	Aug. 31, 2014													Aug. 31, 2014
Benefit Plans [Abstract]	'													'
Components Of Net Pension Expense	'													'
			Three Months Ended August 31													Six Months Ended August 31
	(In thousands)		Pension Plan				Restoration Plan				Total			(In thousands)		Pension Plan				Restoration Plan				Total
			2014		2013		2014		2013		2014		2013			2014		2013		2014		2013		2014		2013
	Interest cost	$	2,008	$	1,895	$	113	$	98	$	2,121	$	1,993	Interest cost	$	4,016	$	3,791	$	226	$	197	$	4,242	$	3,988
	Expected return on plan assets		-2,247		-1,978		―		―		-2,247		-1,978	Expected return on plan assets		-4,514		-3,958		―		―		-4,514		-3,958
	Recognized actuarial loss		340		429		―		―		340		429	Recognized actuarial loss		680		837		―		―		680		837
	Net pension expense	$	101	$	346	$	113	$	98	$	214	$	444	Net pension expense	$	182	$	670	$	226	$	197	$	408	$	867

Debt_Tables

Debt (Tables)	6 Months Ended
	Aug. 31, 2014
Debt [Abstract]	'
Schedule Of Debt	'
			As of August 31		As of February 28
	(In thousands)	2014			2014
	Short-term revolving credit facility		$	2,229	$	582
	Current portion of finance and capital lease obligations			20,280		18,459
	Current portion of non-recourse notes payable			260,425		223,938
	Total current debt			282,934		242,979
	Finance and capital lease obligations, excluding current portion			310,689		315,925
	Non-recourse notes payable, excluding current portion			7,648,284		7,024,506
	Total debt, excluding current portion			7,958,973		7,340,431
	Total debt		$	8,241,907	$	7,583,410

Stock_And_StockBased_Incentive1

Stock And Stock-Based Incentive Plans (Tables)	6 Months Ended
	Aug. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Composition Of Share-Based Compensation Expense	'
			Three Months Ended						Six Months Ended
			31-Aug						31-Aug
	(In thousands)		2014			2013			2014			2013
	Cost of sales		$	1,247		$	586		$	1,574		$	1,859
	CarMax Auto Finance income			961			730			1,637			1,512
	Selling, general and administrative expenses			20,493			14,063			35,209			35,237
	Share-based compensation expense, before income taxes		$	22,701		$	15,379		$	38,420		$	38,608
Composition Of Share-Based Compensation Expense - By Grant Type	'
			Three Months Ended						Six Months Ended
			31-Aug						31-Aug
	(In thousands)		2014			2013			2014			2013
	Nonqualified stock options		$	6,887		$	5,786		$	15,007		$	12,819
	Cash-settled restricted stock units			11,074			5,884			14,221			17,972
	Stock-settled restricted stock units			3,472			2,891			7,593			6,711
	Employee stock purchase plan			311			318			642			606
	Restricted stock awards to non-employee directors			957			―			957			―
	Stock grants to non-employee directors			―			500			―			500
	Share-based compensation expense, before income taxes		$	22,701		$	15,379		$	38,420		$	38,608
Assumptions Used To Estimate Option Values	'
			Six Months Ended August 31
			2014						2013
	Dividend yield					0.0	%					0.0	%
	Expected volatility factor (1)		25.2	%	-	32.7	%		28.1	%	-	46.8	%
	Weighted average expected volatility					31.9	%					44.7	%
	Risk-free interest rate (2)		0.03	%	-	2.7	%		0.02	%	-	2.6	%
	Expected term (in years) (3)					4.7						4.7
	(1)Measured using historical daily price changes of our stock for a period corresponding to the term of the options and the implied volatility derived from the market prices of traded options on our stock.
	(2)Based on the U.S. Treasury yield curve in effect at the time of grant.
	(3)Represents the estimated number of years that options will be outstanding prior to exercise.
Stock Option [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Stock Option Activity	'
									Weighted
									Average
					Weighted				Remaining				Aggregate
		Number of			Average				Contractual				Intrinsic
	(Shares and intrinsic value in thousands)	Shares			Exercise Price				Life (Years)				Value
	Outstanding as of February 28, 2014		10,018		$	27.02
	Options granted		2,003			44.96
	Options exercised		-2,591			17.09
	Options forfeited or expired		-16			32.69
	Outstanding as of August 31, 2014		9,414		$	33.56				4.4			$	177,333
	Exercisable as of August 31, 2014		4,979		$	27.40				3.3			$	124,494
Outstanding Stock Options	'
							As of August 31, 2014
							Options Outstanding								Options Exercisable
										Weighted
										Average			Weighted				Weighted
										Remaining			Average				Average
	(Shares in thousands)						Number of			Contractual			Exercise		Number of		Exercise
	Range of Exercise Prices						Shares			Life (Years)			Price		Shares		Price
	$	11.43						554			1.6		$	11.43		554	$	11.43
	$	13.19	-	$	19.82			488			0.9		$	15.57		488	$	15.57
	$	19.98	-	$	25.39			1,288			2.7		$	25.19		1,288	$	25.19
	$	28.81	-	$	32.69			3,511			4.2		$	32.12		2,181	$	32.22
	$	33.11	-	$	49.25			3,573			6.1		$	43.89		468	$	42.21
	Total							9,414			4.4		$	33.56		4,979	$	27.40
Assumptions Used To Estimate Option Values	'
	Assumptions Used to Estimate Option Values
			Six Months Ended August 31
			2014						2013
	Dividend yield					0.0	%					0.0	%
	Expected volatility factor (1)		25.2	%	-	32.7	%		28.1	%	-	46.8	%
	Weighted average expected volatility					31.9	%					44.7	%
	Risk-free interest rate (2)		0.03	%	-	2.7	%		0.02	%	-	2.6	%
	Expected term (in years) (3)					4.7						4.7
	(1)Measured using historical daily price changes of our stock for a period corresponding to the term of the options and the implied volatility derived from the market prices of traded options on our stock.
	(2)Based on the U.S. Treasury yield curve in effect at the time of grant.
	(3)Represents the estimated number of years that options will be outstanding prior to exercise.
Cash-Settled For Restricted Stock Unit [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Restricted Stock Awards And Restricted Stock Unit Activity	'
					Weighted
					Average
			Number of		Grant Date
	(Units in thousands)		Units		Fair Value
	Outstanding as of February 28, 2014		1,531		$	35.68
	Stock units granted		588		$	44.96
	Stock units vested and converted		-463		$	32.77
	Stock units cancelled		-65		$	38.86
	Outstanding as of August 31, 2014		1,591		$	39.82
Expected Cash Settlement Range Upon Restricted Stock Unit Vesting	'
			As of August 31, 2014
	(In thousands)		Minimum (1)			Maximum (1)
	Fiscal 2016		$	12,376		$	33,003
	Fiscal 2017			14,100			37,600
	Fiscal 2018			16,285			43,428
	Total expected cash settlements		$	42,761		$	114,031
	(1)Net of estimated forfeitures.
Stock-Settled Restricted Stock Units [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Restricted Stock Awards And Restricted Stock Unit Activity	'
					Weighted
					Average
			Number of		Grant Date
	(Units in thousands)		Units		Fair Value
	Outstanding as of February 28, 2014		852		$	45.26
	Stock units granted		245		$	55.37
	Stock units vested and converted		-289		$	45.65
	Stock units cancelled		―		$	―
	Outstanding as of August 31, 2014		808		$	48.18

Net_Earnings_Per_Share_Tables

Net Earnings Per Share (Tables)	6 Months Ended
	Aug. 31, 2014
Net Earnings Per Share [Abstract]	'
Basic And Dilutive Net Earnings Per Share Reconciliations	'
		Three Months Ended				Six Months Ended
		31-Aug				31-Aug
	(In thousands except per share data)	2014		2013		2014		2013
	Net earnings	$	154,518	$	140,274	$	324,171	$	286,925
	Weighted average common shares outstanding		218,180		223,610		219,224		224,114
	Dilutive potential common shares:
	Stock options		2,269		3,319		2,520		3,257
	Stock-settled restricted stock units and awards		621		705		607		722
	Weighted average common shares and dilutive
	potential common shares		221,070		227,634		222,351		228,093
	Basic net earnings per share	$	0.71	$	0.63	$	1.48	$	1.28
	Diluted net earnings per share	$	0.70	$	0.62	$	1.46	$	1.26

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	6 Months Ended
	Aug. 31, 2014
Accumulated Other Comprehensive Loss [Abstract]	'
Changes In Accumulated Other Comprehensive Loss By Component	'
										Total
			Net							Accumulated
			Unrecognized				Net			Other
			Actuarial				Unrecognized			Comprehensive
	(In thousands, net of income taxes)		Losses				Hedge Losses			Loss
	Balance as of February 28, 2014		$	-38,715			$	-7,556		$	-46,271
	Other comprehensive loss before reclassifications			―				-1,255			-1,255
	Amounts reclassified from accumulated other comprehensive loss			426				2,633			3,059
	Other comprehensive income			426				1,378			1,804
	Balance as of August 31, 2014		$	-38,289			$	-6,178		$	-44,467
Changes In And Reclassifications Out Of Accumulated Other Comprehensive Loss	'
			Three Months Ended August 31				Six Months Ended August 31
	(In thousands)		2014		2013		2014		2013
	Retirement Benefit Plans (Note 9):
	Actuarial loss amortization reclassifications recognized
	in net pension expense:
	Cost of sales	$	138	$	172	$	276	$	334
	CarMax Auto Finance income		8		10		15		19
	Selling, general and administrative expenses		194		247		389		484
	Total amortization reclassifications recognized
	in net pension expense		340		429		680		837
	Tax expense		-127		-159		-254		-311
	Amortization reclassifications recognized in net
	pension expense, net of tax		213		270		426		526
	Net change in retirement benefit plan unrecognized
	actuarial losses, net of tax		213		270		426		526
	Cash Flow Hedges (Note 5):
	Effective portion of changes in fair value		-271		2,890		-2,069		3,352
	Tax benefit/(expense)		107		-1,139		814		-1,320
	Effective portion of changes in fair value, net of tax		-164		1,751		-1,255		2,032
	Reclassifications to CarMax Auto Finance income		2,076		2,605		4,339		5,510
	Tax expense		-816		-1,025		-1,706		-2,169
	Reclassification of hedge losses, net of tax		1,260		1,580		2,633		3,341
	Net change in cash flow hedge unrecognized losses,
	net of tax		1,096		3,331		1,378		5,373
	Total other comprehensive income, net of tax	$	1,309	$	3,601	$	1,804	$	5,899

Summary_Of_Significant_Account2

Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	6 Months Ended
	Aug. 31, 2014	Feb. 28, 2014
	item
Summary Of Significant Accounting Policies [Abstract]	'	'
Cash equivalents	$327,000,000	$607,000,000
Restricted cash from collections on auto loan receivables	297,068,000	259,299,000
Number of warehouses	2	'
Required benchmark for account delinquency	'120 days	'
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	778,700,000	730,600,000
Restricted cash on deposit in reserve accounts	37,500,000	32,500,000
Restricted investments	$52,100,000	$40,200,000

CarMax_Auto_Finance_Income_Com

CarMax Auto Finance Income (Components Of CarMax Auto Finance Income) (Details) (USD $)	3 Months Ended				6 Months Ended
	Aug. 31, 2014		Aug. 31, 2013		Aug. 31, 2014		Aug. 31, 2013
Auto Finance Income [Line Items]	'		'		'		'
Interest and fee income	$150,700,000		$137,200,000		$297,600,000		$270,700,000
Interest expense	-23,900,000		-22,600,000		-47,000,000		-45,400,000
Total interest margin	126,800,000		114,600,000		250,600,000		225,300,000
Provision for loan losses	-20,400,000		-18,000,000		-36,200,000		-29,300,000
Total interest margin after provision for loan losses	106,400,000		96,600,000		214,400,000		196,000,000
Other income	0		100,000		0		100,000
Payroll and fringe benefit expense	-6,300,000		-5,600,000		-12,500,000		-11,100,000
Other direct expenses	-7,500,000		-6,700,000		-14,700,000		-13,600,000
Total direct expenses	-13,800,000		-12,300,000		-27,200,000		-24,700,000
CarMax Auto Finance income	92,574,000		84,422,000		187,189,000		171,441,000
Average Balance of Loans Held in Porfolio	$7,724,500,000		$6,516,300,000		$7,557,300,000		$6,334,400,000
Interest And Fee Income [Member]	'		'		'		'
Auto Finance Income [Line Items]	'		'		'		'
Item as percent of total average managed receivables	7.80%	[1]	8.40%	[1]	7.90%	[1]	8.50%	[1]
Interest Expense [Member]	'		'		'		'
Auto Finance Income [Line Items]	'		'		'		'
Item as percent of total average managed receivables	-1.20%	[1]	-1.40%	[1]	-1.20%	[1]	-1.40%	[1]
Total Interest Margin [Member]	'		'		'		'
Auto Finance Income [Line Items]	'		'		'		'
Item as percent of total average managed receivables	6.60%	[1]	7.00%	[1]	6.60%	[1]	7.10%	[1]
Provision For Loan Losses [Member]	'		'		'		'
Auto Finance Income [Line Items]	'		'		'		'
Item as percent of total average managed receivables	-1.10%	[1]	-1.10%	[1]	-1.00%	[1]	-0.90%	[1]
Total Interest Margin After Provision For Loan Losses [Member]	'		'		'		'
Auto Finance Income [Line Items]	'		'		'		'
Item as percent of total average managed receivables	5.50%	[1]	5.90%	[1]	5.70%	[1]	6.20%	[1]
Other Income [Member]	'		'		'		'
Auto Finance Income [Line Items]	'		'		'		'
Item as percent of total average managed receivables	0.00%	[1]	0.00%	[1]	0.00%	[1]	0.00%	[1]
Payroll And Fringe Benefit Expense [Member]	'		'		'		'
Auto Finance Income [Line Items]	'		'		'		'
Item as percent of total average managed receivables	-0.30%	[1]	-0.30%	[1]	-0.30%	[1]	-0.40%	[1]
Other Direct Expenses [Member]	'		'		'		'
Auto Finance Income [Line Items]	'		'		'		'
Item as percent of total average managed receivables	-0.40%	[1]	-0.40%	[1]	-0.40%	[1]	-0.40%	[1]
Total Direct Expenses [Member]	'		'		'		'
Auto Finance Income [Line Items]	'		'		'		'
Item as percent of total average managed receivables	-0.70%	[1]	-0.70%	[1]	-0.70%	[1]	-0.80%	[1]
CAF Income [Member]	'		'		'		'
Auto Finance Income [Line Items]	'		'		'		'
Item as percent of total average managed receivables	4.80%	[1]	5.20%	[1]	5.00%	[1]	5.40%	[1]
[1]	Annualized percentage of total average managed receivables.

Auto_Loan_Receivables_Auto_Loa

Auto Loan Receivables (Auto Loan Receivables, Net) (Details) (USD $)	Aug. 31, 2014		31-May-14	Feb. 28, 2014		Aug. 31, 2013	31-May-13	Feb. 28, 2013
Non-recourse notes payable	$7,910,000,000		'	$7,250,000,000		'	'	'
Total ending managed receivables	7,891,000,000	[1],[2]	'	7,184,400,000	[1],[2]	'	'	'
Accrued interest and fees	31,800,000		'	26,300,000		'	'	'
Other	-700,000		'	7,000,000		'	'	'
Less allowance for loan losses	-77,800,000		-75,400,000	-69,900,000		-65,900,000	-60,900,000	-57,300,000
Auto loan receivables, net	7,844,268,000		'	7,147,848,000		'	'	'
Warehouse Facilities [Member]	'		'	'		'	'	'
Total ending managed receivables	1,045,000,000		'	879,000,000		'	'	'
Term Securitizations [Member]	'		'	'		'	'	'
Total ending managed receivables	6,603,300,000		'	6,145,500,000		'	'	'
Other Receivables [Member]	'		'	'		'	'	'
Total ending managed receivables	$242,700,000		'	$159,900,000		'	'	'
[1]	Other receivables includes receivables not funded through the warehouse facilities or term securitizations.
[2]	Classified based on credit grade assigned when customers were initially approved for financing.

Auto_Loan_Receivables_Ending_M

Auto Loan Receivables (Ending Managed Receivables By Major Credit Grade) (Details) (USD $)	Aug. 31, 2014		Feb. 28, 2014
In Millions, unless otherwise specified
Financing Receivable, By Major Credit Grade [Line Items]	'		'
Total ending managed receivables	$7,891	[1],[2]	$7,184.40	[1],[2]
Total ending managed receivables as percentage by major credit grade	100.00%	[3]	100.00%	[3]
Credit Grade A [Member]	'		'
Financing Receivable, By Major Credit Grade [Line Items]	'		'
Total ending managed receivables	3,867.30	[2]	3,506	[2]
Total ending managed receivables as percentage by major credit grade	49.00%	[3]	48.80%	[3]
Credit Grade B [Member]	'		'
Financing Receivable, By Major Credit Grade [Line Items]	'		'
Total ending managed receivables	2,884.90	[2]	2,658.50	[2]
Total ending managed receivables as percentage by major credit grade	36.60%	[3]	37.00%	[3]
Credit Grade C And Other [Member]	'		'
Financing Receivable, By Major Credit Grade [Line Items]	'		'
Total ending managed receivables	$1,138.80	[2]	$1,019.90	[2]
Total ending managed receivables as percentage by major credit grade	14.40%	[3]	14.20%	[3]
[1]	Other receivables includes receivables not funded through the warehouse facilities or term securitizations.
[2]	Classified based on credit grade assigned when customers were initially approved for financing.
[3]	Percentage of total ending managed receivables.

Auto_Loan_Receivables_Allowanc

Auto Loan Receivables (Allowance For Loan Losses) (Details) (USD $)

3 Months Ended

6 Months Ended

In Millions, unless otherwise specified

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2014

31-May-14

Feb. 28, 2014

Aug. 31, 2013

31-May-13

Feb. 28, 2013

Allowance For Loan Losses [Member]

Allowance For Loan Losses [Member]

Allowance For Loan Losses [Member]

Allowance For Loan Losses [Member]

Allowance For Loan Losses [Member]

Allowance For Loan Losses [Member]

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

'

'

Balance as of beginning of period

$75.40

$60.90

$69.90

$57.30

'

'

'

'

'

'

Charge-offs

-36.9

-31.8

-68.9

-58.2

'

'

'

'

'

'

Recoveries

18.9

18.8

40.6

37.5

'

'

'

'

'

'

Provision for loan losses

-20.4

-18

-36.2

-29.3

'

'

'

'

'

'

Balance as of end of period

$77.80

$65.90

$77.80

$65.90

'

'

'

'

'

'

Item as percent of total ending managed receivables

'

'

'

'

0.99%

[1]

1.00%

[1]

0.97%

[1]

0.99%

[1]

0.96%

[1]

0.97%

[1]

[1]

(1)Percentage of total ending managed receivables as of the corresponding reporting date.

Auto_Loan_Receivables_Past_Due

Auto Loan Receivables (Past Due Receivables) (Details) (USD $)	Aug. 31, 2014		Feb. 28, 2014
In Millions, unless otherwise specified
Financing Receivable, Past Due [Line Items]	'		'
Total ending managed receivables	$7,891	[1],[2]	$7,184.40	[1],[2]
31-60 days past due	150		126.6
61-90 days past due	52.1		42.6
Greater than 90 days past due	17.9		16
Total past due	$220		$185.20
Past due receivables as a percentage of total ending managed receivables	2.80%	[3]	2.60%	[3]
Managed Receivables [Member]	'		'
Financing Receivable, Past Due [Line Items]	'		'
Item as percent of total ending managed receivables	100.00%	[3]	100.00%	[3]
31-60 Days Past Due [Member]	'		'
Financing Receivable, Past Due [Line Items]	'		'
Past due receivables as a percentage of total ending managed receivables	1.90%	[3]	1.80%	[3]
61-90 Days Past Due [Member]	'		'
Financing Receivable, Past Due [Line Items]	'		'
Past due receivables as a percentage of total ending managed receivables	0.70%	[3]	0.60%	[3]
Greater Than 90 Days Past Due [Member]	'		'
Financing Receivable, Past Due [Line Items]	'		'
Past due receivables as a percentage of total ending managed receivables	0.20%	[3]	0.20%	[3]
[1]	Other receivables includes receivables not funded through the warehouse facilities or term securitizations.
[2]	Classified based on credit grade assigned when customers were initially approved for financing.
[3]	(1)Percentage of total ending managed receivables.

Derivative_Instruments_And_Hed2

Derivative Instruments And Hedging Activities (Narrative) (Details) (Interest Rate Swaps [Member], USD $)	6 Months Ended
In Millions, unless otherwise specified	Aug. 31, 2014	Feb. 28, 2014
Designated As Hedging Instrument [Member] | Cash Flow Hedging [Member]	'	'
Derivative [Line Items]	'	'
Additional reclassification as decrease from AOCL to CAF income	$11	'
Derivative notional amount	1,021	869
Not Designated As Hedging Instrument [Member]	'	'
Derivative [Line Items]	'	'
Offsetting notional amount of interest rate derivatives	$0	$0

Derivative_Instruments_And_Hed3

Derivative Instruments And Hedging Activities (Fair Values Of Derivative Instruments On The Consolidated Balance Sheets) (Details) (USD $)	Aug. 31, 2014		Feb. 28, 2014
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]	'		'
Assets	$94		$0
Liabilities	-1,211		-1,351
Designated As Hedging Instrument [Member] | Interest Rate Swaps [Member] | Other Current Assets [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Assets	94	[1]	0	[1]
Liabilities	0	[1]	0	[1]
Designated As Hedging Instrument [Member] | Interest Rate Swaps [Member] | Accounts Payable [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Assets	0	[2]	0	[2]
Liabilities	($1,211)	[2]	($1,351)	[2]
[1]	Reported in accounts payable on the consolidated balance sheets.
[2]	(2)Reported in accounts payable on the consolidated balance sheets.

Derivative_Instruments_And_Hed4

Derivative Instruments And Hedging Activities (Schedule Of Effect Of Derivative Instruments On The Consolidated Statements Of Earnings) (Details) (Designated As Hedging Instrument [Member], USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Aug. 31, 2014		Aug. 31, 2013		Aug. 31, 2014		Aug. 31, 2013
Designated As Hedging Instrument [Member]	'		'		'		'
Derivative [Line Items]	'		'		'		'
Gain/(loss) recognized in AOCL	($271)	[1]	$2,890	[1]	($2,069)	[1]	$3,352	[1]
Loss reclassified from AOCL into CAF Income	-2,076	[1]	-2,605	[1]	-4,339	[1]	-5,510	[1]
Gain recognized in CAF income	$0	[2]	$57	[2]	$0	[2]	$78	[2]
[1]	(1)Represents the effective portion.
[2]	Represents the ineffective portion.

Fair_Value_Measurements_Schedu

Fair Value Measurements (Schedule Of Items Measured At Fair Value On A Recurring Basis) (Details) (USD $)	Aug. 31, 2014	Feb. 28, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Money market securities	$370,384	$641,622
Mutual fund investments	8,726	5,609
Derivative instruments	94	'
Total assets at fair value	379,204	647,231
Percent of total assets at fair value	100.00%	100.00%
Percent of total assets	3.10%	5.50%
Derivative instruments	1,211	1,351
Total liabilities at fair value	1,211	1,351
Percent of total liabilities	0.00%	0.00%
Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Money market securities	370,384	641,622
Mutual fund investments	8,726	5,609
Derivative instruments	0	'
Total assets at fair value	379,110	647,231
Percent of total assets at fair value	100.00%	100.00%
Percent of total assets	3.10%	5.50%
Derivative instruments	0	0
Total liabilities at fair value	0	0
Percent of total liabilities	0.00%	0.00%
Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Money market securities	0	0
Mutual fund investments	0	0
Derivative instruments	94	'
Total assets at fair value	94	0
Percent of total assets at fair value	0.00%	0.00%
Percent of total assets	0.00%	0.00%
Derivative instruments	1,211	1,351
Total liabilities at fair value	$1,211	$1,351
Percent of total liabilities	0.00%	0.00%

Cancellation_Reserves_Schedule

Cancellation Reserves (Schedule Of Cancellation Reserves Accrual) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Cancellation Reserves [Abstract]	'	'	'	'
Balance as of beginning of period	$81.10	$33.30	$72.50	$32.70
Cancellations	-12.5	-8.5	-25	-17
Provision for future cancellations	17.4	9.2	38.5	18.3
Balance as of end of period	$86	$34	$86	$34

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	Aug. 31, 2014	Feb. 28, 2014
In Millions, unless otherwise specified
Income Taxes [Abstract]	'	'
Unrecognized tax benefits, gross	$28.30	$26.30

Benefit_Plans_Narrative_Detail

Benefit Plans (Narrative) (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Aug. 31, 2014
Benefit Plans [Abstract]	'
Contributions to pension plan	$1
Anticipated contribution during remainder of fiscal year	$1.30

Benefit_Plans_Components_Of_Ne

Benefit Plans (Components Of Net Pension Expense) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Interest cost	$2,121	$1,993	$4,242	$3,988
Expected return on plan assets	-2,247	-1,978	-4,514	-3,958
Recognized actuarial loss	340	429	680	837
Net pension expense	214	444	408	867
Pension Plan [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Interest cost	2,008	1,895	4,016	3,791
Expected return on plan assets	-2,247	-1,978	-4,514	-3,958
Recognized actuarial loss	340	429	680	837
Net pension expense	101	346	182	670
Restoration Plan [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Interest cost	113	98	226	197
Expected return on plan assets	0	0	0	0
Recognized actuarial loss	0	0	0	0
Net pension expense	$113	$98	$226	$197

Benefit_Plans_Assumptions_Used

Benefit Plans (Assumptions Used To Determine Net Pension Expense) (Details)	12 Months Ended
	Feb. 28, 2014
Benefit Plans [Abstract]	'
Expected rate of return on plan assets	7.75%

Debt_Narrative_Details

Debt (Narrative) (Details) (USD $)

Aug. 31, 2014

Feb. 28, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Jul. 02, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Revolving Credit Facility [Member]

Warehouse Facilities [Member]

Term Securitizations Debt [Member]

Warehouse Facility One [Member]

Warehouse Facility One [Member]

Warehouse Facility Two [Member]

Warehouse Facility Two [Member]

Previously Reported [Member]

Minimum [Member]

Maximum [Member]

Warehouse Facilities [Member]

Warehouse Facilities [Member]

Warehouse Facilities [Member]

Warehouse Facilities [Member]

Warehouse Facility One [Member]

Finance And Capital Lease Obligation [Member]

Finance And Capital Lease Obligation [Member]

Warehouse Facilities [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Maximum borrowing capacity of revolving credit facility

'

'

$700,000,000

'

'

'

'

'

'

'

'

'

Warehouse Facility Additional Limit

'

'

'

'

'

'

'

'

300,000,000

'

'

'

Revolving credit facility, expiration date

'

'

1-Aug-16

'

'

'

'

'

'

'

'

'

Revolving Credit Facility, Remaining Borrowing Capacity

'

'

698,000,000

'

'

'

'

'

'

'

'

'

Initial lease terms, in years

'

'

'

'

'

'

'

'

'

'

'15 years

'20 years

Debt maturity, end

'

'

'

'

1-Feb-21

'

'

'

'

'

'

'

Non-recourse notes payable

7,910,000,000

7,250,000,000

'

1,040,000,000

6,860,000,000

'

'

'

'

'

'

'

Warehouse facilities maximum borrowing capacity

'

'

'

2,100,000,000

'

800,000,000

800,000,000

1,300,000,000

'

800,000,000

'

'

Remaining borrowing capacity

'

'

'

$1,060,000,000

'

'

'

'

'

'

'

'

Warehouse facility expiration date

'

'

'

'

'

1-Jul-15

'

1-Feb-15

'

'

'

'

Warehouse facility additional term of facility, days

'

'

'

'

'

'

'364 days

'

'

'

'

'

Debt_Schedule_Of_Debt_Details

Debt (Schedule Of Debt) (Details) (USD $)	Aug. 31, 2014	Feb. 28, 2014
In Thousands, unless otherwise specified
Debt [Abstract]	'	'
Short-term revolving credit facility	$2,229	$582
Current portion of finance and capital lease obligations	20,280	18,459
Current portion of non-recourse notes payable	260,425	223,938
Total current debt	282,934	242,979
Finance and capital lease obligations, excluding current portion	310,689	315,925
Non-recourse notes payable, excluding current portion	7,648,284	7,024,506
Total debt, excluding current portion	7,958,973	7,340,431
Total debt	$8,241,907	$7,583,410

Stock_And_StockBased_Incentive2

Stock And Stock-Based Incentive Plans (Narrative) (Details) (USD $)

6 Months Ended

3 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

In Millions, except Share data, unless otherwise specified

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Feb. 28, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Feb. 28, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

FY 2015 Share Repurchase Authorization Member

Share Repurchase Program [Member]

Share Repurchase Program [Member]

Share Repurchase Program [Member]

Share Repurchase Program [Member]

Share Repurchase Program [Member]

Stock Compensation Plan [Member]

Stock Compensation Plan [Member]

Stock Option [Member]

Stock Option [Member]

Stock Option [Member]

Stock Option [Member]

Cash-Settled Restricted Stock Units [Member]

Cash-Settled Restricted Stock Units [Member]

Cash-Settled Restricted Stock Units [Member]

Cash-Settled Restricted Stock Units [Member]

Cash-Settled Restricted Stock Units [Member]

Stock-Settled Restricted Stock Units [Member]

Stock-Settled Restricted Stock Units [Member]

Stock-Settled Restricted Stock Units [Member]

Stock-Settled Restricted Stock Units [Member]

Stock-Settled Restricted Stock Units [Member]

Restricted Stock Awards [Member]

Restricted Stock Awards [Member]

FY 2013 Share Repurchase Authorizations Member

Minimum [Member]

Maximum [Member]

Minimum [Member]

Maximum [Member]

Minimum [Member]

Maximum [Member]

Stock and Stock-Based Incentive Plans

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share repurchase, authorized amount

$1,000

'

'

'

'

$800

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share repurchase, authorization expiration

31-Dec-15

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares repurchased during the period

'

4,024,801

1,046,629

7,866,740

3,992,251

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share repurchase, average purchase price per share

'

$49.92

$46.54

$47.68

$43.40

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share repurchase, amount remaining for repurchase

'

907

'

907

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Incentive stock option grants in period

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Vesting period, in years

'

'

'

'

'

'

'

'

'

'

'1 year

'4 years

'3 years

'

'

'

'

'3 years

'

'

'

'

'1 year 0 months 0 days

'

Years until expiration

'

'

'

'

'

'

'

'

'

'

'

'10 years

'

'

'

'

'

'

'

'

'

'

'

'

Cash payment per RSU, percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

75.00%

200.00%

'

'

'

'

'

'

'

MSUs converted to common stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

2

'

'

Conversion ratio, number of final trading days in vesting period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'40 days

'

'

'

'

'

'

Restricted stock awards granted, number of shares

'

'

'

'

'

'

'

'

'

'

'

'

587,511

541,819

'

'

'

245,190

236,675

'

'

'

22,860

'

Restricted stock granted, weighted average grant date fair value

'

'

'

'

'

'

'

'

'

'

'

'

$44.96

$42.68

'

'

'

$55.37

$51.98

'

'

'

$51.18

'

Options granted, Number of Shares

'

'

'

'

'

'

'

'

2,003,238

1,601,699

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Capitalized share-based compensation

'

'

'

'

'

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash received as a result of stock option exercises

'

'

'

'

'

'

'

'

44.3

20.8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total intrinsic value of options exercised

'

'

'

'

'

'

'

'

85.9

29.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Related tax benefits

'

'

'

'

'

'

'

'

34.6

11.8

'

'

8.6

9.2

'

'

'

7.4

6.7

'

'

'

'

'

Options granted, weighted average grant date fair value

'

'

'

'

'

'

'

'

$13.21

$15.59

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unrecognized compensation costs related to nonvested options/MSU/RSA

'

'

'

'

'

'

'

'

43.7

'

'

'

'

'

'

'

'

19

'

'

'

'

0.2

'

Weighted average period, years

'

'

'

'

'

'

'

'

'2 years 7 months 6 days

'

'

'

'

'

'

'

'

'1 year 4 months 24 days

'

'

'

'

'0 years 9 months 18 days

'

Payment related to restricted stock units vested during the period

'

'

'

'

'

'

'

'

'

'

'

'

$21.20

$23

'

'

'

'

'

'

'

'

'

'

Awards outstanding

'

'

'

'

'

'

'

'

'

'

'

'

1,591,000

'

1,531,000

'

'

808,000

'

852,000

'

'

'

0

Stock_And_StockBased_Incentive3

Stock And Stock-Based Incentive Plans (Composition Of Share-Based Compensation Expense) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Share-based compensation expense, before income taxes	$22,701	$15,379	$38,420	$38,608
Cost Of Sales [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Share-based compensation expense, before income taxes	1,247	586	1,574	1,859
CAF Income [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Share-based compensation expense, before income taxes	961	730	1,637	1,512
Selling, General And Administrative Expenses [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Share-based compensation expense, before income taxes	$20,493	$14,063	$35,209	$35,237

Stock_And_StockBased_Incentive4

Stock And Stock-Based Incentive Plans (Composition Of Share-Based Compensation Expense - By Grant Type) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Share-based compensation expense, before income taxes	$22,701	$15,379	$38,420	$38,608
Stock Options [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Share-based compensation expense, before income taxes	6,887	5,786	15,007	12,819
Cash-Settled Restricted Stock Units [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Share-based compensation expense, before income taxes	11,074	5,884	14,221	17,972
Stock-Settled Restricted Stock Units [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Share-based compensation expense, before income taxes	3,472	2,891	7,593	6,711
Employee Stock Purchase Plan [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Share-based compensation expense, before income taxes	311	318	642	606
Restricted Stock Awards [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Share-based compensation expense, before income taxes	957	0	957	0
Stock Grants To Non-Employee Directors [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Share-based compensation expense, before income taxes	$0	$500	$0	$500

Stock_And_StockBased_Incentive5

Stock And Stock-Based Incentive Plans (Stock Option Activity) (Details) (Stock Option [Member], USD $)	6 Months Ended
In Thousands, except Share data, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013
Stock Option [Member]	'	'
Outstanding as of February 28, 2014, Number of Shares	10,018,000	'
Options granted, Number of Shares	2,003,238	1,601,699
Options exercised, Number of Shares	-2,591,000	'
Options forfeited or expired, Number of Shares	-16,000	'
Outstanding as of August 31, 2014, Number of Shares	9,414,000	'
Exercisable as of August 31, 2014, Number of Shares	4,979,000	'
Outstanding as of February 28, 2014, Weighted Average Exercise Price	$27.02	'
Options granted, Weighted Average Exercise Price	$44.96	'
Options exercised, Weighted Average Exercise Price	$17.09	'
Options forfeited or expired, Weighted Average Exercise Price	$32.69	'
Outstanding as of August 31, 2014, Weighted Average Exercise Price	$33.56	'
Exercisable as of August 31, 2014, Weighted Average Exercise Price	$27.40	'
Outstanding as of August 31, 2014, Weighted Average Remaining Contractual Life (Years)	'4 years 4 months 24 days	'
Exercisable as of August 31, 2014, Weighted Average Remaining Contractual Life (Years)	'3 years 3 months 18 days	'
Outstanding as of August 31, 2014, Aggregate Intrinsic Value	$177,333	'
Exercisable as of August 31, 2014, Aggregate Intrinsic Value	$124,494	'

Stock_And_StockBased_Incentive6

Stock And Stock-Based Incentive Plans (Outstanding Stock Options) (Details) (USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Aug. 31, 2014	Feb. 28, 2014
$11.43 [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Range of Exercise Prices, lower range	$11.43	'
Options Outstanding, Number of Shares	554	'
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	'1 year 7 months 6 days	'
Options Outstanding, Weighted Average Exercise Price	$11.43	'
Options Exercisable, Number of Shares	554	'
Options Exercisable, Weighted Average Exercise Price	$11.43	'
$13.19 To $19.82 [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Range of Exercise Prices, lower range	$13.19	'
Range of Exercise Prices, upper range	$19.82	'
Options Outstanding, Number of Shares	488	'
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	'0 years 10 months 24 days	'
Options Outstanding, Weighted Average Exercise Price	$15.57	'
Options Exercisable, Number of Shares	488	'
Options Exercisable, Weighted Average Exercise Price	$15.57	'
$19.98 To $25.39 [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Range of Exercise Prices, lower range	$19.98	'
Range of Exercise Prices, upper range	$25.39	'
Options Outstanding, Number of Shares	1,288	'
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	'2 years 8 months 12 days	'
Options Outstanding, Weighted Average Exercise Price	$25.19	'
Options Exercisable, Number of Shares	1,288	'
Options Exercisable, Weighted Average Exercise Price	$25.19	'
$28.81 To $32.69 [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Range of Exercise Prices, lower range	$28.81	'
Range of Exercise Prices, upper range	$32.69	'
Options Outstanding, Number of Shares	3,511	'
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	'4 years 2 months 12 days	'
Options Outstanding, Weighted Average Exercise Price	$32.12	'
Options Exercisable, Number of Shares	2,181	'
Options Exercisable, Weighted Average Exercise Price	$32.22	'
$33.11 To $49.25 [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Range of Exercise Prices, lower range	$33.11	'
Range of Exercise Prices, upper range	$49.25	'
Options Outstanding, Number of Shares	3,573	'
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	'6 years 1 month 6 days	'
Options Outstanding, Weighted Average Exercise Price	$43.89	'
Options Exercisable, Number of Shares	468	'
Options Exercisable, Weighted Average Exercise Price	$42.21	'
Stock Option [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Options Outstanding, Number of Shares	9,414	'
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	'4 years 4 months 24 days	'
Options Outstanding, Weighted Average Exercise Price	$33.56	$27.02
Options Exercisable, Number of Shares	4,979	'
Options Exercisable, Weighted Average Exercise Price	$27.40	'

Stock_And_StockBased_Incentive7

Stock And Stock-Based Incentive Plans (Assumptions Used To Estimate Option Values) (Details)	6 Months Ended
	Aug. 31, 2014		Aug. 31, 2013
Stock And Stock-Based Incentive Plans [Abstract]	'		'
Dividend yield	0.00%		0.00%
Expected volatility factor, Minimum	25.20%	[1]	28.10%	[1]
Expected volatility factor, Maximum	32.70%	[1]	46.80%	[1]
Weighted average expected volatility	31.90%		44.70%
Risk-free interest rate, Minimum	0.03%	[2]	0.02%	[2]
Risk-free interest rate, Maximum	2.70%	[2]	2.60%	[2]
Expected term (in years)	'4 years 8 months 12 days	[3]	'4 years 8 months 12 days	[3]
[1]	Measured using historical daily price changes of our stock for a period corresponding to the term of the options and the implied volatility derived from the market prices of traded options on our stock.
[2]	2)Based on the U.S. Treasury yield curve in effect at the time of grant.
[3]	(3)Represents the estimated number of years that options will be outstanding prior to exercise.

Stock_And_StockBased_Incentive8

Stock And Stock-Based Incentive Plans (Cash-Settled Restricted Stock Unit Activity) (Details) (Cash-Settled Restricted Stock Units [Member], USD $)	6 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
Cash-Settled Restricted Stock Units [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Outstanding at beginning of year, Number of Shares or Units	1,531,000	'
Stock units granted, Number of Units	587,511	541,819
Stock units vested and converted, Number of Units	-463,000	'
Stock units cancelled, Number of Units	-65,000	'
Outstanding at end of year, number of shares or Units	1,591,000	'
Outstanding as of February 28, 2014, Weighted Average Grant Date Fair Value	$35.68	'
Restricted stock granted, weighted average grant date fair value	$44.96	$42.68
Stock units vested and converted, Weighted Average Grant Date Fair Value	$32.77	'
Stock units cancelled, Weighted Average Grant Date Fair Value	$38.86	'
Outstanding as of August 31, 2014, Weighted Average Grant Date Fair Value	$39.82	'

Stock_And_StockBased_Incentive9

Stock And Stock-Based Incentive Plans (Expected Cash Settlement Range Upon Restricted Stock Unit Vesting) (Details) (USD $)	Aug. 31, 2014
In Thousands, unless otherwise specified
Minimum [Member]	'
Fiscal 2016	$12,376	[1]
Fiscal 2017	14,100	[1]
Fiscal 2018	16,285	[1]
Total expected cash settlements	42,761	[1]
Maximum [Member]	'
Fiscal 2016	33,003	[1]
Fiscal 2017	37,600	[1]
Fiscal 2018	43,428	[1]
Total expected cash settlements	$114,031	[1]
[1]	(1)Net of estimated forfeitures.

Recovered_Sheet1

Stock And Stock-Based Incentive Plans (Stock-Settled Restricted Stock Unit Activity) (Details) (Stock-Settled Restricted Stock Units [Member], USD $)	6 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
Stock-Settled Restricted Stock Units [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Outstanding at beginning of year, Number of Shares or Units	852,000	'
Stock units granted, Number of Units	245,190	236,675
Stock units vested and converted, Number of Units	-289,000	'
Stock units cancelled, Number of Units	0	'
Outstanding at end of year, number of shares or Units	808,000	'
Outstanding as of February 28, 2014, Weighted Average Grant Date Fair Value	$45.26	'
Restricted stock granted, weighted average grant date fair value	$55.37	$51.98
Stock units vested and converted, Weighted Average Grant Date Fair Value	$45.65	'
Stock units cancelled, Weighted Average Grant Date Fair Value	$0	'
Outstanding as of August 31, 2014, Weighted Average Grant Date Fair Value	$48.18	'

Net_Earnings_Per_Share_Narrati

Net Earnings Per Share (Narrative) (Details)	3 Months Ended		6 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Net Earnings Per Share [Abstract]	'	'	'	'
Anti-dilutive securities not included in calculation of diluted net earnings per share	2,885,903	1,426,163	2,586,357	1,073,635

Net_Earnings_Per_Share_Basic_A

Net Earnings Per Share (Basic And Dilutive Net Earnings Per Share Reconciliations) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Schedule of Basic and Dilutive Net Earnings Per Share Reconciliation [Line Items]	'	'	'	'
Net earnings	$154,518	$140,274	$324,171	$286,925
Weighted average common shares outstanding	218,180	223,610	219,224	224,114
Weighted average common shares and dilutive potential common shares	221,070	227,634	222,351	228,093
Basic net earnings per share	$0.71	$0.63	$1.48	$1.28
Diluted net earnings per share	$0.70	$0.62	$1.46	$1.26
Stock Options [Member]	'	'	'	'
Schedule of Basic and Dilutive Net Earnings Per Share Reconciliation [Line Items]	'	'	'	'
Dilutive potential common shares	2,269	3,319	2,520	3,257
Stock-Settled Restricted Stock Units [Member]	'	'	'	'
Schedule of Basic and Dilutive Net Earnings Per Share Reconciliation [Line Items]	'	'	'	'
Dilutive potential common shares	621	705	607	722

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss (Narrative) (Details) (USD $)	6 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Aug. 31, 2014	Feb. 28, 2014
Accumulated Other Comprehensive Loss [Abstract]	'	'
Deferred tax	$26.50	$27.70

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Loss (Accumulated Other Comprehensive Loss) (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Aug. 31, 2014
Schedule of Accumulated Other Comprehensive Loss [Line Items]	'
Balance	($46,271)
Other comprehensive income before reclassifications	-1,255
Amounts reclassified from accumulated other comprehensive loss	3,059
Other comprehensive income (loss)	1,804
Balance	-44,467
Net Unrecognized Actuarial Losses [Member]	'
Schedule of Accumulated Other Comprehensive Loss [Line Items]	'
Balance	-38,715
Other comprehensive income before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss	426
Other comprehensive income (loss)	426
Balance	-38,289
Net Unrecognized Hedge Losses [Member]	'
Schedule of Accumulated Other Comprehensive Loss [Line Items]	'
Balance	-7,556
Other comprehensive income before reclassifications	-1,255
Amounts reclassified from accumulated other comprehensive loss	2,633
Other comprehensive income (loss)	1,378
Balance	($6,178)

Accumulated_Other_Comprehensiv4

Accumulated Other Comprehensive Loss (Changes In and Reclassifications Out of Accumulated Other Comprehensive Loss) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Actuarial loss amortization reclassifications in net pension expense	$340	$429	$680	$837
Tax expense	-127	-159	-254	-311
Amortization reclassifications recognized in net pension expense, net of tax	213	270	426	526
Net change in retirement benefit plan unrecognized actuarial losses, net of tax	213	270	426	526
Effective portion of changes in fair value	-271	2,890	-2,069	3,352
Tax (expense) benefit	107	-1,139	814	-1,320
Effective portion of changes in fair value, net of tax	-164	1,751	-1,255	2,032
Reclassifications to CarMax Auto Finance income	2,076	2,605	4,339	5,510
Tax expense	-816	-1,025	-1,706	-2,169
Reclassifications to CarMax Auto Finance income, net of tax	1,260	1,580	2,633	3,341
Net change in cash flow hedge unrecognzied losses, net of tax	1,096	3,331	1,378	5,373
Other comprehensive income (loss), net of taxes	1,309	3,601	1,804	5,899
Cost Of Sales [Member]	'	'	'	'
Actuarial loss amortization reclassifications in net pension expense	138	172	276	334
Carmax Auto Finance [Member]	'	'	'	'
Actuarial loss amortization reclassifications in net pension expense	8	10	15	19
Selling, General And Administrative Expenses [Member]	'	'	'	'
Actuarial loss amortization reclassifications in net pension expense	$194	$247	$389	$484

Commitments_And_Contingencies_

Commitments And Contingencies (Details) (USD $)	0 Months Ended
In Millions, unless otherwise specified	Jul. 09, 2014
Commitments And Contingencies [Abstract]	'
Gain (Loss) Related to Litigation Settlement	$20.90