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Financial Instruments (Fair Value Measured On Recurring Basis) (Details) (USD $)
In Thousands, unless otherwise specified
Aug. 31, 2012
Nov. 30, 2011
Financial Instruments [Line Items]    
Aggregate principal balance of loans held-for-sale $ 402,600 $ 292,200
Fair Value, Option, Aggregate Differences, Loans held-for-sale 19,200 11,600
Lennar Financial Services [Member] | Fair Value, Inputs, Level 2 [Member]
   
Financial Instruments [Line Items]    
Loans Held-for-sale, Fair Value Disclosure 421,840 [1] 303,780 [1]
Lennar Financial Services [Member] | Mortgage Loan Commitments [Member] | Fair Value, Inputs, Level 2 [Member]
   
Financial Instruments [Line Items]    
Mortgage Loan Commitments 11,658 4,192
Lennar Financial Services [Member] | Forward Contracts [Member] | Fair Value, Inputs, Level 2 [Member]
   
Financial Instruments [Line Items]    
Other Liabilities, Fair Value Disclosure (3,956) (1,404)
Lennar Homebuilding [Member] | Fair Value, Inputs, Level 3 [Member]
   
Financial Instruments [Line Items]    
Investments available-for-sale $ 19,045 $ 42,892
[1] The aggregate fair value of loans held-for-sale of $421.8 million at August 31, 2012 exceeds their aggregate principal balance of $402.6 million by $19.2 million. The aggregate fair value of loans held-for-sale of $303.8 million at November 30, 2011 exceeds their aggregate principal balance of $292.2 million by $11.6 million.