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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		9 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2021	Aug. 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	$ 131	$ 175	$ (495)	$ (209)
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	131	175	(495)	(209)
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)	493,671	0	690,791	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)	4,196	2,229	(26,156)	6
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)	118	(4,534)	260	24,177
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)	$ 1,649	$ (205)	$ 11,934	$ (1,088)

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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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-Publisher FASB
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Amount of unrealized gain (loss) on investment.

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