Lennar Homebuilding Investments in Unconsolidated Entities (Narrative) (Details) $ in Thousands		1 Months Ended	3 Months Ended		9 Months Ended
		May 31, 2017 USD ($)	Aug. 31, 2018 USD ($) investment	Aug. 31, 2017 USD ($) homes	Aug. 31, 2018 USD ($) investment	Aug. 31, 2017 USD ($) homes	Feb. 28, 2018	Nov. 30, 2017 USD ($)
Schedule of Equity Method Investments [Line Items]
Equity in earnings (loss) from unconsolidated entities					$ (8,115)	$ 12,838
Payments to acquire unconsolidated entities					302,333	381,209
Gain on sale of strategic joint venture					$ 164,880	0
FivePoint Unconsolidated Entity
Schedule of Equity Method Investments [Line Items]
Unconsolidated entities ownership percentage			40.00%		40.00%
Payments to acquire unconsolidated entities		$ 100,000
Investments in unconsolidated entities			$ 358,900		$ 358,900
Lennar Homebuilding
Schedule of Equity Method Investments [Line Items]
Equity in earnings (loss) from unconsolidated entities			(15,391)	$ (9,651)	(41,904)	(42,691)
Investments in unconsolidated entities	[1]		997,488		997,488			$ 900,769
Underlying equity in unconsolidated partners' net assets			$ 1,300,000		$ 1,300,000			$ 1,300,000
Lennar Homebuilding | Equity Method Investment One [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Summarized Financial Information, Sales of Real Estate				$ 18,800		$ 18,800
Equity Method Investment, Number of Real Estate Properties Sold | homes				475		475
Deferred Income (Loss) from Equity Method Investments				$ 7,800		$ 7,800
Lennar Homebuilding | Joint Ventures Previously Managed by FivePoint Communities
Schedule of Equity Method Investments [Line Items]
Number of investments in joint ventures contributed | investment			3		3
Lennar Homebuilding | Treasure Island Holdings
Schedule of Equity Method Investments [Line Items]
Unconsolidated entities ownership percentage							80.00%
Gain on sale of strategic joint venture					$ 164,900

[1] Under certain provisions of Accounting Standards Codification ("ASC") Topic 810, Consolidations, ("ASC 810") the Company is required to separately disclose on its condensed consolidated balance sheets the assets owned by consolidated variable interest entities ("VIEs") and liabilities of consolidated VIEs as to which neither Lennar Corporation, or any of its subsidiaries, has any obligations. As of August 31, 2018, total assets include $775.7 million related to consolidated VIEs of which $48.5 million is included in Lennar Homebuilding cash and cash equivalents, $1.0 million in Lennar Homebuilding receivables, net, $78.4 million in Lennar Homebuilding finished homes and construction in progress, $243.7 million in Lennar Homebuilding land and land under development, $328.8 million in Lennar Homebuilding consolidated inventory not owned, $4.5 million in Lennar Homebuilding investments in unconsolidated entities, $10.5 million in Lennar Homebuilding other assets, $12.0 million in Rialto assets and $48.1 million in Lennar Multifamily assets. As of November 30, 2017, total assets include $799.4 million related to consolidated VIEs of which $15.8 million is included in Lennar Homebuilding cash and cash equivalents, $0.2 million in Lennar Homebuilding receivables, net, $53.2 million in Lennar Homebuilding finished homes and construction in progress, $229.0 million in Lennar Homebuilding land and land under development, $393.3 million in Lennar Homebuilding consolidated inventory not owned, $4.6 million in Lennar Homebuilding investments in unconsolidated entities, $11.8 million in Lennar Homebuilding other assets, $48.8 million in Rialto assets and $42.7 million in Lennar Multifamily assets.