Operating and Reporting Segments (Disclosure Of Financial Information Relating To Company's Operations) (Details) $ in Thousands		3 Months Ended		9 Months Ended
		Aug. 31, 2017 USD ($) $ / homes	Aug. 31, 2016 USD ($) $ / homes	Aug. 31, 2017 USD ($) $ / homes	Aug. 31, 2016 USD ($) $ / homes	Feb. 10, 2017 USD ($)	Nov. 30, 2016 USD ($)
Segment Reporting Information [Line Items]
Assets	[1]	$ 16,939,373		$ 16,939,373			$ 15,361,781
Revenues		3,261,476	$ 2,833,894	8,860,796	$ 7,573,373
Operating earnings (loss):
Operating earnings		441,245	400,722	927,961	1,033,724
Corporate general and administrative expenses		72,860	61,164	200,333	164,634
Earnings before income taxes		368,385	339,558	727,628	869,090
Sales incentives		$ 165,400	$ 152,300	$ 463,400	$ 402,200
Sales incentives per home delivered (in dollars per home) | $ / homes		21,800	22,500	22,400	22,000
WCI Communities, Inc.
Segment Reporting Information [Line Items]
Goodwill						$ 160,270
Homebuilding East | WCI Communities, Inc.
Segment Reporting Information [Line Items]
Goodwill						$ 140,300
Rialto
Segment Reporting Information [Line Items]
Assets	[1]	$ 1,195,407		$ 1,195,407			1,276,210
Goodwill		5,396		5,396			5,396
Revenues		57,810	$ 63,885	207,804	$ 152,434
Lennar Financial Services
Segment Reporting Information [Line Items]
Assets	[1]	1,385,188		1,385,188			1,754,672
Goodwill		59,838		59,838			39,838
Revenues		215,056	191,444	571,462	491,340
Lennar Financial Services | WCI Communities, Inc.
Segment Reporting Information [Line Items]
Goodwill		20,000		20,000
Lennar Multifamily
Segment Reporting Information [Line Items]
Assets	[1]	683,258		683,258			526,131
Revenues		103,415	81,596	291,900	195,264
Lennar Homebuilding
Segment Reporting Information [Line Items]
Assets	[1]	13,675,520		13,675,520			11,804,768
Goodwill	[1]	140,270		140,270			0
Revenues		2,885,195	2,496,969	7,789,630	6,734,335
Operating earnings (loss):
Accrual for litigation		0	0	140,000	0
Operating Segments | Homebuilding East
Segment Reporting Information [Line Items]
Assets		4,812,569		4,812,569			3,512,990
Revenues		1,255,797	1,002,584	3,218,413	2,615,936
Operating earnings (loss):
Operating earnings		179,908	161,789	277,906	389,433
Accrual for litigation				140,000
Gain on sale of clubhouse			8,700		8,700
Operating Segments | Homebuilding Central
Segment Reporting Information [Line Items]
Assets		2,092,624		2,092,624			1,993,403
Revenues		602,901	622,304	1,801,424	1,645,131
Operating earnings (loss):
Operating earnings		66,184	67,759	194,986	169,716
Operating Segments | Homebuilding West
Segment Reporting Information [Line Items]
Assets		5,093,996		5,093,996			4,318,924
Revenues		823,500	671,122	2,146,492	1,940,520
Operating earnings (loss):
Operating earnings		112,749	92,308	237,333	294,949
Operating Segments | Rialto
Segment Reporting Information [Line Items]
Assets		1,195,407		1,195,407			1,276,210
Revenues		57,810	63,885	207,804	152,434
Operating earnings (loss):
Operating earnings		(3,192)	(57)	(10,497)	(16,533)
Operating Segments | Lennar Financial Services
Segment Reporting Information [Line Items]
Assets		1,385,188		1,385,188			1,754,672
Revenues		215,056	191,444	571,462	491,340
Operating earnings (loss):
Operating earnings		49,057	53,248	113,448	112,267
Operating Segments | Lennar Multifamily
Segment Reporting Information [Line Items]
Assets		683,258		683,258			526,131
Revenues		103,415	81,596	291,900	195,264
Operating earnings (loss):
Operating earnings		9,104	2,649	34,816	29,774
Homebuilding Other
Segment Reporting Information [Line Items]
Assets		913,250		913,250			907,523
Revenues		202,997	200,959	623,301	532,748
Operating earnings (loss):
Operating earnings		27,435	$ 23,026	79,969	$ 54,118
Corporate and unallocated
Segment Reporting Information [Line Items]
Assets		$ 763,081		$ 763,081			$ 1,071,928

[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, 2017, total assets include $812.9 million related to consolidated VIEs of which $9.7 million is included in Lennar Homebuilding cash and cash equivalents, $0.2 million in Lennar Homebuilding receivables, net, $81.3 million in Lennar Homebuilding finished homes and construction in progress, $189.6 million in Lennar Homebuilding land and land under development, $386.6 million in Lennar Homebuilding consolidated inventory not owned, $4.6 million in Lennar Homebuilding investments in unconsolidated entities, $13.1 million in Lennar Homebuilding other assets, $85.8 million in Rialto assets and $42.0 million in Lennar Multifamily assets.As of November 30, 2016, total assets include $536.3 million related to consolidated VIEs of which $13.3 million is included in Lennar Homebuilding cash and cash equivalents, $0.2 million in Lennar Homebuilding receivables, net, $54.2 million in Lennar Homebuilding finished homes and construction in progress, $106.3 million in Lennar Homebuilding land and land under development, $121.0 million in Lennar Homebuilding consolidated inventory not owned, $4.6 million in Lennar Homebuilding investments in unconsolidated entities, $13.9 million in Lennar Homebuilding other assets, $213.8 million in Rialto assets and $8.8 million in Lennar Multifamily assets.