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Financial Instruments and Fair Value Disclosures - (Schedule Of Gains And Losses Of Financial Instruments) (Details) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2021	May 31, 2020
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Changes in fair value included in other comprehensive income (loss), net of tax	$ 316	$ (338)	$ (626)	$ (384)
Fair Value, Measurements, Recurring | Lennar Other
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Changes in fair value included in other comprehensive income (loss), net of tax	316	(338)	(626)	(384)
Fair Value, Measurements, Recurring | Lennar Other | Forward contracts
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Lennar Other realized and unrealized gain (loss)	(272,625)	0	197,120	0
Fair Value, Measurements, Recurring | Financial Services | Loans held-for-sale
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Lennar Other realized and unrealized gain (loss)	4,669	5,270	(30,352)	(2,223)
Fair Value, Measurements, Recurring | Financial Services | Mortgage loan commitments
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Lennar Other realized and unrealized gain (loss)	5,057	13,816	142	28,711
Fair Value, Measurements, Recurring | Financial Services | Forward contracts
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Lennar Other realized and unrealized gain (loss)	$ (23,953)	$ 8,478	$ 10,285	$ (883)

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Amount, after tax and before adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
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-Publisher FASB
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-Topic 220
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Amount of unrealized gain (loss) on investment.

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