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, 2026	May 31, 2025	May 31, 2026	May 31, 2025
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Lennar Other losses from technology investments	$ (23,252)	$ (29,440)	$ (8,414)	$ (91,943)
Changes in fair value included in other comprehensive income (loss), net of tax	70	(1,332)	(335)	(1,510)
Lennar Other
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Lennar Other losses from technology investments	(23,252)	(29,440)	(8,414)	(91,943)
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	21,558	76,955	8,575	28,492
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	17,550	3,458	8,278	162
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)	(57,891)	(32,753)	(25,489)	(2,350)
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)	(16,520)	(22,583)	(9,310)	10,921
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	70	(1,332)	(335)	(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 losses from technology investments	$ (23,252)	$ (29,440)	$ (8,414)	$ (91,943)

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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Amount of unrealized gain (loss) on investment.

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