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Financial Instruments (Reconciliation Of Beginning And Ending Balance For The Company's Level 3 Recurring Fair Value Measurements) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Feb. 28, 2015
Feb. 28, 2014
Available-for-sale Securities [Member] | Lennar Homebuilding [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning of period $ 480us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarHomebuildingMember		 $ 40,032us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarHomebuildingMember
Purchases and other 28,093us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarHomebuildingMember		 [1] 15,994us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarHomebuildingMember		 [1]
Available-for-Sale Securities Change in Fair Value 0len_AvailableforSaleSecuritiesChangeinFairValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarHomebuildingMember		 [2] 4,928len_AvailableforSaleSecuritiesChangeinFairValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarHomebuildingMember		 [2]
Settlements 0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarHomebuildingMember		 [3] (1,074)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarHomebuildingMember		 [3]
End of period 28,573us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarHomebuildingMember		 59,880us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_AvailableforsaleSecuritiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarHomebuildingMember
Servicing Contracts [Member] | Lennar Financial Services [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning of period 17,353us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ServicingContractsMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarFinancialServicesMember		 11,455us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ServicingContractsMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarFinancialServicesMember
Purchases and other 344us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ServicingContractsMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarFinancialServicesMember		 1,421us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ServicingContractsMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarFinancialServicesMember
Changes in fair value included in earnings (132)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ServicingContractsMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarFinancialServicesMember		 [4] (660)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ServicingContractsMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarFinancialServicesMember		 [4]
Settlements (779)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ServicingContractsMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarFinancialServicesMember		 (261)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ServicingContractsMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarFinancialServicesMember
End of period 16,786us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ServicingContractsMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarFinancialServicesMember		 11,955us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_ServicingContractsMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_LennarFinancialServicesMember
Loans Held-For-Sale [Member] | Rialto [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning of period 113,596us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= len_LoansHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_RialtoInvestmentsMember		 44,228us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= len_LoansHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_RialtoInvestmentsMember
Purchases and other 565,515us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= len_LoansHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_RialtoInvestmentsMember		 295,508us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= len_LoansHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_RialtoInvestmentsMember
Sales (318,104)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= len_LoansHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_RialtoInvestmentsMember		 (253,038)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= len_LoansHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_RialtoInvestmentsMember
Interest accrued (208)len_FairValueMeasurementwithUnobservableInputsReconciliationRecurringAssetInterestAccrued
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= len_LoansHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_RialtoInvestmentsMember		 (394)len_FairValueMeasurementwithUnobservableInputsReconciliationRecurringAssetInterestAccrued
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= len_LoansHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_RialtoInvestmentsMember
Changes in fair value included in earnings (754)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= len_LoansHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_RialtoInvestmentsMember		 [5] 553us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= len_LoansHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_RialtoInvestmentsMember
End of period $ 360,045us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= len_LoansHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_RialtoInvestmentsMember		 $ 86,857us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= len_LoansHeldForSaleMember
/ us-gaap_StatementBusinessSegmentsAxis
= len_RialtoInvestmentsMember
[1] Represents investments in community development district bonds that mature at various dates between 2015 and 2039.
[2] The changes in fair value were not included in other comprehensive income because the changes in fair value were deferred as a result of the Company's continuing involvement in the underlying real estate collateral.
[3] The investments available-for-sale that were settled during the three months ended February 28, 2014 related to investments in community development district bonds, which were in default by the borrower and regarding which the Company redeemed the bonds.
[4] Amount represents changes in fair value included in Lennar Financial Services revenues.
[5] Amount represents changes in fair value included in Rialto revenues.