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Supplemental Guarantor Information (Narrative) (Details)	12 Months Ended
	Nov. 30, 2012
Guarantees [Abstract]
Ownership share in guarantor subsidiaries	100.00%

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- Definition

Ownership share in guarantor subsidiaries.

+ References

No definition available.

+ Details

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Namespace Prefix:	kbh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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- Details

Name:	us-gaap_GuaranteesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration