Financial Instruments and Fair Value Disclosures - (Fair Value Measured On Recurring Basis) (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Feb. 28, 2022	Nov. 30, 2021
Level 1 | Lennar Other
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Investments in equity securities	$ 502,755	$ 906,539
Level 3 | Financial Services
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	2,793	2,492
Level 3 | Lennar Other
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Investments available-for-sale	34,760	41,654
Residential | Loans held-for-sale | Financial Services
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Aggregate principal balance	1,091,676	1,586,764
Aggregate fair value of loans (below) in excess of principal balance	22,132	49,519
Residential | Level 2 | Financial Services
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Loans held for sale	1,113,808	1,636,283
Commercial | Loans held-for-sale | Financial Services
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Aggregate principal balance	86,385	0
Aggregate fair value of loans (below) in excess of principal balance	(590)	68
Commercial | Level 3 | Financial Services
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Loans held for sale	$ 85,795	$ 68