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Supplemental Guarantor Information (Narrative) (Details)	12 Months Ended
	Nov. 30, 2018
Guarantees [Abstract]
Ownership share in guarantor subsidiaries	100.00%
Line of Credit Facility, Significant Subsidiary Threshold, Percent	5.00%
Line of Credit Facility, Non Guarantor Subsidiary Threshold, Percent	10.00%

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- Definition

Line of Credit Facility, Non Guarantor Subsidiary Threshold, Percent

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

Line of Credit Facility, Significant Subsidiary Threshold, Percent

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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X

- 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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- References

No definition available.

+ Details

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