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Subsequent Event (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Nov. 30, 2011
Subsequent Event (Textual) [Abstract] |
Cash tender offer aggregate principal amount | $ 250

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- Definition Cash tender offer aggregate principal amount. + References No definition available. + Details
Name: | kbh_CashTenderOfferAggregatePrincipalAmount
Namespace Prefix: | kbh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | kbh_SubsequentEventTextualAbstract
Namespace Prefix: | kbh_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration