XML 73 R49.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Stock And Stock-Based Incentive Plans (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified | 6 Months Ended | 3 Months Ended | 6 Months Ended |  | 6 Months Ended |  | 6 Months Ended |  | 6 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 31, 2014 FY 2015 Share Repurchase Authorization Member | Aug. 31, 2014 Share Repurchase Program [Member] | Aug. 31, 2013 Share Repurchase Program [Member] | Aug. 31, 2014 Share Repurchase Program [Member] | Aug. 31, 2013 Share Repurchase Program [Member] | Aug. 31, 2014 Share Repurchase Program [Member] FY 2013 Share Repurchase Authorizations Member | Aug. 31, 2014 Stock Compensation Plan [Member] | Aug. 31, 2013 Stock Compensation Plan [Member] | Aug. 31, 2014 Stock Option [Member] | Aug. 31, 2013 Stock Option [Member] | Aug. 31, 2014 Stock Option [Member] Minimum [Member] | Aug. 31, 2014 Stock Option [Member] Maximum [Member] | Aug. 31, 2014 Cash-Settled Restricted Stock Units [Member] | Aug. 31, 2013 Cash-Settled Restricted Stock Units [Member] | Feb. 28, 2014 Cash-Settled Restricted Stock Units [Member] | Aug. 31, 2014 Cash-Settled Restricted Stock Units [Member] Minimum [Member] | Aug. 31, 2014 Cash-Settled Restricted Stock Units [Member] Maximum [Member] | Aug. 31, 2014 Stock-Settled Restricted Stock Units [Member] | Aug. 31, 2013 Stock-Settled Restricted Stock Units [Member] | Feb. 28, 2014 Stock-Settled Restricted Stock Units [Member] | Aug. 31, 2014 Stock-Settled Restricted Stock Units [Member] Minimum [Member] | Aug. 31, 2014 Stock-Settled Restricted Stock Units [Member] Maximum [Member] | Aug. 31, 2014 Restricted Stock Awards [Member] | Aug. 31, 2013 Restricted Stock Awards [Member]
Stock and Stock-Based Incentive Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchase, authorized amount | $ 1,000 |  |  |  |  | $ 800 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchase, authorization expiration | Dec. 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  | 907.0 |  | 907.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  | 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 |  |  |  |  |  |  |  |  |  |  |  |  | $ 21.2 | $ 23.0 |  |  |  |  |  |  |  |  |  |
Awards outstanding |  |  |  |  |  |  |  |  |  |  |  |  | 1,591,000 |  | 1,531,000 |  |  | 808,000 |  | 852,000 |  |  |  | 0

X
- Definition Cash payment per cash settled restricted stock unit + References No definition available. + Details
Name: | kmx_CashPaymentPerCashSettledRestrictedStockUnit
Namespace Prefix: | kmx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Market Stock Units Converted To Common Stock Conversion Ratio Number Of Final Trading Days In Vesting Period + References No definition available. + Details
Name: | kmx_MarketStockUnitsConvertedToCommonStockConversionRatioNumberOfFinalTradingDaysInVestingPeriod
Namespace Prefix: | kmx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Market stock units converted to common stock for each unit granted + References No definition available. + Details
Name: | kmx_MarketStockUnitsConvertedToCommonStockForEachUnitGranted
Namespace Prefix: | kmx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Payment related to restricted stock units vested during the period + References No definition available. + Details
Name: | kmx_PaymentRelatedToRestrictedStockUnitsVestedDuringPeriod
Namespace Prefix: | kmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period + References No definition available. + Details
Name: | kmx_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod
Namespace Prefix: | kmx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stock repurchase program, authorization expiration + References No definition available. + Details
Name: | kmx_StockRepurchaseProgramAuthorizationExpiration
Namespace Prefix: | kmx_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
Name: | us-gaap_TreasuryStockAcquiredAverageCostPerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_TreasuryStockSharesAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration