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Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified | Aug. 31, 2012 | Nov. 30, 2011
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Variable Interest Entities [Abstract] |  |
Cash deposits associated with land option and other similar contracts of unconsolidated VIE's | $ 6.4 | $ 8.1
Aggregate purchase price of land option and other similar contracts of unconsolidated VIE's | 316.9 | 122.1
Total cash deposits associated with land option and other similar contracts that were not VIE's | 22.9 | 12.8
Aggregate purchase price of land option and other similar contracts that were not VIE's | 282.1 | 223.0
Non refundable deposits related to land option and other similar contracts | 29.3 | 20.9
Pre-acquisition costs related to land option contracts and other similar contracts | 27.1 | 31.5
Outstanding letters of credit | 0.5 | 1.7
Increase in inventories and accrued expenses and other liabilities | $ 20.0 | $ 23.9

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- Definition Acquisition costs related to land option contracts and other similar contracts. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Cash deposits associated with land option and other similar contracts of non variable interest entities. + References No definition available. + Details
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- Definition Cash deposits associated with land option and other similar contracts of unconsolidated variable interest entities. + References No definition available. + Details
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Balance Type: | debit
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- Definition Increase in inventories and accrued expenses and other liabilities due to land option and other similar contracts. + References No definition available. + Details
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- Definition Non-refundable cash deposits on land option and other similar contracts. + References No definition available. + Details
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- Definition Outstanding letters of credit in lieu of cash deposits under certain land option or other similar contracts. + References No definition available. + Details
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Namespace Prefix: | kbh_
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- Definition Purchase price associated with land option and other similar contracts of non variable interest entities. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Purchase price associated with land option and other similar contracts of unconsolidated variable interest entities. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Details
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