Financial Instruments and Fair Value Disclosures - (Fair Value Assets Measured On Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring - Level 3 - USD ($) $ in Thousands	3 Months Ended
Feb. 28, 2026	Feb. 28, 2025
Homebuilding
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Finished homes and construction in progress, carrying value	$ 404,294	$ 259,540
Finished homes and construction in progress, fair value	371,507	239,197
Finished homes and construction in progress, total losses, net	(32,787)	(20,343)
Land and land under development, carrying value	0	190
Land and land under development, fair value	0	134
Land and land under development, total losses, net	0	(56)
Deposits and pre-acquisition costs on real estate, carrying value	5,341	268
Deposits and pre-acquisition costs on real estate, fair value	0	0
Deposits and pre-acquisition costs on real estate, net	(5,341)	(268)
Multifamily
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Land and land under development, carrying value	0	7,594
Land and land under development, fair value	0	0
Land and land under development, total losses, net	0	$ (7,594)
Lennar Financial Services
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Loans Held For Sale, Carrying Value	15,317
Loans Held For Sale, Fair Value	15,169
Loans Held For Sale, Net	$ (148)

Deposits And Pre-acquisition Costs On Real Estate, Carrying Value

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Deposits And Pre-acquisition Costs On Real Estate, Fair Value

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Inventory, Homes under Construction and Finished Homes, Fair Value Measurement Adjustments, After Impairment

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Loans Held For Sale, Carrying Value

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