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, 2026	Aug. 31, 2025	Aug. 31, 2026	Aug. 31, 2025
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Lennar Other gains (losses) from technology investments	$ (53,335)	$ 99,223	$ (61,749)	$ 7,280
Changes in fair value included in other comprehensive income (loss), net of tax	79	0	(256)	(1,510)
Lennar Other
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Lennar Other gains (losses) from technology investments	(53,335)	99,223	(61,749)	7,280
Fair Value, Measurements, Recurring \| Lennar Financial Services \| Forward contracts
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Derivative, Gain (Loss) on Derivative, Net	19,067	(36,411)	27,642	(7,919)
Fair Value, Measurements, Recurring \| Lennar Financial Services \| Interest Rate Swap
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(37)	(6,652)	8,241	(6,490)
Fair Value, Measurements, Recurring \| Lennar Financial Services \| Loans held-for-sale
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Realized Investment Gains (Losses)	(18,219)	23,361	(43,708)	21,011
Fair Value, Measurements, Recurring \| Lennar Financial Services \| Mortgage loan commitments
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Realized Investment Gains (Losses)	(9,296)	34,590	(18,606)	45,511
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	79	0	(256)	(1,510)
Fair Value, Measurements, Recurring \| Lennar Other \| Equity Securities
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Lennar Other gains (losses) from technology investments	$ (53,335)	$ 99,223	$ (61,749)	$ 7,280

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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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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Amount of realized gain (loss) on investment.

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