Variable Interest Entities (Estimated Maximum Exposure To Loss) (Details) - USD ($) $ in Thousands	Aug. 31, 2017	Nov. 30, 2016
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments in Unconsolidated VIEs	$ 709,552	$ 433,128
Lennar’s Maximum Exposure to Loss	973,370	785,157
Lennar Homebuilding | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments in Unconsolidated VIEs	233,150	120,940
Lennar’s Maximum Exposure to Loss	301,176	164,804
Obligations related to VIEs	63,300	43,400
Rialto
Variable Interest Entity [Line Items]
Investments held-to-maturity	142,462	71,260
Rialto | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments in Unconsolidated VIEs	142,462	71,260
Lennar’s Maximum Exposure to Loss	142,462	71,260
Investments held-to-maturity	142,500	71,300
Lennar Multifamily | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments in Unconsolidated VIEs	333,940	240,928
Lennar’s Maximum Exposure to Loss	529,732	549,093
Lennar Multifamily | Variable Interest Entity, Not Primary Beneficiary | Equity Commitments
Variable Interest Entity [Line Items]
Obligations related to VIEs	182,100	288,200
Lennar Multifamily | Variable Interest Entity, Not Primary Beneficiary | Financial Standby Letters of Credit
Variable Interest Entity [Line Items]
Obligations related to VIEs	$ 13,000	$ 19,700