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Financial Instruments and Fair Value Disclosures - (Narrative) (Details) $ in Millions	3 Months Ended	9 Months Ended
	Aug. 31, 2023 USD ($) community	Aug. 31, 2023 USD ($) community	Aug. 31, 2022 community
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Active communities | community	1,247	1,247	1,182
Other than temporary impairment losses, investments | $	$ 36.8	$ 36.8
Valuation Technique, Discounted Cash Flow | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment, measurement input	0.15	0.15

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Number of Active Communities

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Value of input used to measure alternative investment.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
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The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
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-Publisher FASB
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