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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 9 Months Ended
Aug. 31, 2025
Aug. 31, 2024
Aug. 31, 2025
Aug. 31, 2024
Homebuilding        
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]        
Finished homes and construction in progress, carrying value $ 479,233 $ 120,811 $ 1,221,892 $ 313,120
Finished homes and construction in progress, fair value 430,986 111,776 1,103,619 280,761
Finished homes and construction in progress, total losses, net (48,247) (9,035) (118,273) (32,359)
Land and land under development, carrying value     191 0
Land and land under development, fair value     134 0
Land and land under development, total losses, net     (57) 0
Deposits and pre-acquisition costs on real estate, carrying value 8,919 206 17,847 3,408
Deposits and pre-acquisition costs on real estate, fair value 0 0 0 0
Deposits and pre-acquisition costs on real estate, net (8,919) (206) (17,847) (3,408)
Multifamily        
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]        
Land and land under development, carrying value 0 139,980 10,716 139,980
Land and land under development, fair value 0 49,970   49,970
Land and land under development, total losses, net 0 $ (90,010) (10,716) $ (90,010)
Lennar Financial Services        
Fair Value, Assets and Liabilities Measured on a Recuring and Nonrecurring Basis [Line Items]        
Loans Held For Sale, Carrying Value 61,001   61,001  
Loans Held For Sale, Fair Value 50,284   50,284  
Loans Held For Sale, Net $ (10,717)   $ (10,717)