Segment Information (Narrative) (Details)	12 Months Ended
Nov. 30, 2024 segment
KBHS, LLC \| Financial service
Segment Reporting Information [Line Items]
Ownership interest in joint venture	50.00%
KBHS, LLC \| GR Alliance, LLC
Segment Reporting Information [Line Items]
Ownership interest in joint venture	50.00%
Homebuilding
Segment Reporting Information [Line Items]
Number of reportable segments	4
Financial services
Segment Reporting Information [Line Items]
Number of reportable segments	1

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 54
-Subparagraph (e)
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-18

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