Operating and Reporting Segments (Disclosure Of Financial Information Relating To Company's Operations) (Details) $ in Thousands		3 Months Ended		9 Months Ended
		Aug. 31, 2018 USD ($) $ / homes	Aug. 31, 2017 USD ($) $ / homes	Aug. 31, 2018 USD ($) $ / homes	Aug. 31, 2017 USD ($) $ / homes	Feb. 28, 2018	Feb. 12, 2018 USD ($)	Nov. 30, 2017 USD ($)	Feb. 10, 2017 USD ($)
Segment Reporting Information [Line Items]
Assets	[1]	$ 28,289,395		$ 28,289,395				$ 18,745,034
Revenues		5,672,569	$ 3,261,476	14,112,421	$ 8,860,796
Operating earnings (loss) (2):
Operating earnings		674,256	441,245	1,615,289	927,961
Acquisition and integration costs related to CalAtlantic		11,992	0	140,062	0
Corporate general and administrative expenses		96,346	72,860	249,071	200,333
Earnings before income taxes		565,918	368,385	1,226,156	727,628
Sales incentives		$ 289,000	$ 165,400	$ 717,000	$ 463,400
Sales incentives per home delivered (in dollars per home) | $ / homes		22,900	21,800	22,800	22,400
Valuation adjustment				$ 29,400	$ 7,500
Gain on sale of strategic joint venture				164,880	0
CalAtlantic Group, Inc.
Segment Reporting Information [Line Items]
Goodwill							$ 3,300,000
Operating earnings (loss) (2):
Acquisition and integration costs related to CalAtlantic		$ 12,000		140,100
WCI Communities, Inc.
Segment Reporting Information [Line Items]
Goodwill									$ 156,566
Operating earnings (loss) (2):
Acquisition and integration costs related to CalAtlantic			$ 6,900		25,900
Homebuilding East | WCI Communities, Inc.
Segment Reporting Information [Line Items]
Goodwill									136,600
Rialto
Segment Reporting Information [Line Items]
Assets	[1]	834,882		834,882				1,153,840
Goodwill		5,396		5,396				5,396
Revenues		49,495	57,810	149,033	207,804
Lennar Financial Services
Segment Reporting Information [Line Items]
Assets	[1]	2,042,024		2,042,024				1,689,508
Goodwill		231,245		231,245				59,838
Revenues		236,268	215,056	639,543	571,462
Lennar Financial Services | CalAtlantic Group, Inc.
Segment Reporting Information [Line Items]
Goodwill							169,000
Lennar Financial Services | WCI Communities, Inc.
Segment Reporting Information [Line Items]
Goodwill		20,000		20,000					$ 20,000
Lennar Multifamily
Segment Reporting Information [Line Items]
Assets	[1]	890,057		890,057				710,725
Revenues		101,064	103,415	312,013	291,900
Lennar Homebuilding
Segment Reporting Information [Line Items]
Assets	[1]	24,522,432		24,522,432				15,190,961
Goodwill	[1]	3,457,999		3,457,999				136,566
Revenues		5,285,742	2,885,195	13,011,832	7,789,630
Operating earnings (loss) (2):
Lennar Homebuilding loss due to litigation accrual		0	0	0	140,000
Lennar Homebuilding | Treasure Island Holdings
Operating earnings (loss) (2):
Gain on sale of strategic joint venture				164,900
Ownership interest in strategic joint venture						80.00%
Lennar Homebuilding | CalAtlantic Group, Inc.
Segment Reporting Information [Line Items]
Goodwill							$ 3,321,433
Operating Segments | Homebuilding East
Segment Reporting Information [Line Items]
Assets		7,455,782		7,455,782				4,754,581
Revenues		2,028,989	1,255,797	5,000,182	3,218,413
Operating earnings (loss) (2):
Operating earnings		228,657	179,908	504,019	277,906
Lennar Homebuilding loss due to litigation accrual					140,000
Operating Segments | Homebuilding Central
Segment Reporting Information [Line Items]
Assets		3,414,907		3,414,907				2,037,905
Revenues		1,231,170	602,901	3,041,003	1,801,424
Operating earnings (loss) (2):
Operating earnings		135,978	66,184	264,463	194,986
Operating Segments | Homebuilding West
Segment Reporting Information [Line Items]
Assets		7,812,183		7,812,183				5,165,218
Revenues		1,505,858	823,500	3,775,488	2,146,492
Operating earnings (loss) (2):
Operating earnings		186,847	112,749	581,461	237,333
Operating Segments | Rialto
Segment Reporting Information [Line Items]
Assets		834,882		834,882				1,153,840
Revenues		49,495	57,810	149,033	207,804
Operating earnings (loss) (2):
Operating earnings		9,444	(3,192)	25,558	(10,497)
Operating Segments | Lennar Financial Services
Segment Reporting Information [Line Items]
Assets		2,042,024		2,042,024				1,689,508
Revenues		236,268	215,056	639,543	571,462
Operating earnings (loss) (2):
Operating earnings		56,628	49,057	128,705	113,448
Operating Segments | Lennar Multifamily
Segment Reporting Information [Line Items]
Assets		890,057		890,057				710,725
Revenues		101,064	103,415	312,013	291,900
Operating earnings (loss) (2):
Operating earnings		(3,853)	9,104	9,734	34,816
Homebuilding Other
Segment Reporting Information [Line Items]
Assets		1,726,472		1,726,472				960,541
Revenues		519,725	202,997	1,195,159	623,301
Operating earnings (loss) (2):
Operating earnings		60,555	$ 27,435	101,349	$ 79,969
Corporate and unallocated (1)
Segment Reporting Information [Line Items]
Assets		$ 4,113,088		$ 4,113,088				$ 2,272,716

[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.