Financial Instruments and Fair Value Disclosures - (Fair Value Measured On Recurring Basis) (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Aug. 31, 2022	Nov. 30, 2021
Level 1 | Financial Services | Forward options
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Derivative asset	$ 16,004	$ 0
Level 1 | Lennar Other
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Investments in equity securities	309,037	906,539
Level 3 | Financial Services
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	3,356	2,492
Level 3 | Lennar Other
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Investments available-for-sale	35,163	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	1,245,511	1,586,764
Aggregate fair value of loans (below) in excess of principal balance	8,164	49,519
Residential | Level 1 | Financial Services
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Loans held for sale	1,253,675	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	6,200	0
Aggregate fair value of loans (below) in excess of principal balance	247	68
Commercial | Level 3 | Financial Services
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]
Loans held for sale	$ 6,447	$ 68