Lennar Homebuilding Investments in Unconsolidated Entities (Total Debt Of Unconsolidated Entities) (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Aug. 31, 2017 USD ($) joint_venture	Nov. 30, 2016 USD ($) joint_venture
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated entities debt repayment guarantee | joint_venture	3	1
Lennar Homebuilding
Schedule of Equity Method Investments [Line Items]
Non-recourse bank debt and other debt (partner’s share of several recourse)	$ 68,302	$ 48,945
Non-recourse land seller debt and other debt	1,997	323,995
Non-recourse debt with completion guarantees	275,959	147,100
Non-recourse debt without completion guarantees	342,987	320,372
Non-recourse debt to the Company	689,245	840,412
The Company’s maximum recourse exposure	70,929	52,438
Debt issuance costs	5,425	4,186
Total debt	$ 754,749	$ 888,664
The Company’s maximum recourse exposure as a % of total JV debt	9.00%	6.00%
Unconsolidated Entity | Lennar Homebuilding
Schedule of Equity Method Investments [Line Items]
Non-recourse land seller debt and other debt		$ 320,000