Operating and Reporting Segments (Disclosure Of Financial Information Relating To Company's Operations) (Details)		3 Months Ended
		Feb. 28, 2018 USD ($) $ / homes	Feb. 28, 2017 USD ($) $ / homes	Feb. 12, 2018 USD ($)	Nov. 30, 2017 USD ($)		Feb. 10, 2017 USD ($)
Segment Reporting Information [Line Items]
Assets	[1]	$ 27,944,023,000			$ 18,745,034,000
Revenues		2,980,791,000	$ 2,337,428,000
Operating earnings (loss) (2):
Operating earnings		441,433,000	110,342,000
Acquisition and integration costs related to CalAtlantic		104,195,000	0
Corporate general and administrative expenses		67,810,000	60,699,000
Earnings before income taxes		269,428,000	49,643,000
Sales incentives		$ 149,900,000	$ 123,500,000
Sales incentives per home delivered (in dollars per home) | $ / homes		22,300	22,700
Valuation adjustment		$ 6,900,000	$ 0
Gain on sale of strategic joint venture		164,880,000	0
CalAtlantic Group, Inc.
Segment Reporting Information [Line Items]
Goodwill				$ 3,400,000,000
Operating earnings (loss) (2):
Acquisition and integration costs related to CalAtlantic		104,200,000
WCI Communities, Inc.
Segment Reporting Information [Line Items]
Goodwill							$ 156,566,000
Operating earnings (loss) (2):
Acquisition and integration costs related to CalAtlantic			11,000,000.0
Homebuilding East | WCI Communities, Inc.
Segment Reporting Information [Line Items]
Goodwill							$ 136,600,000
Rialto
Segment Reporting Information [Line Items]
Assets	[1]	909,249,000			1,153,840,000
Goodwill		5,396,000			5,396,000
Revenues		54,302,000	82,006,000
Lennar Financial Services
Segment Reporting Information [Line Items]
Assets	[1]	1,748,432,000			1,689,508,000
Goodwill		210,628,000			59,838,000
Revenues		171,140,000	148,043,000
Lennar Financial Services | CalAtlantic Group, Inc.
Segment Reporting Information [Line Items]
Goodwill				150,000,000
Lennar Financial Services | WCI Communities, Inc.
Segment Reporting Information [Line Items]
Goodwill		20,000,000.0
Lennar Multifamily
Segment Reporting Information [Line Items]
Assets		892,830,000			710,725,000	[1]
Revenues		93,256,000	88,685,000
Lennar Homebuilding
Segment Reporting Information [Line Items]
Assets	[1]	24,393,512,000			15,190,961,000
Goodwill	[1]	3,433,477,000			136,566,000
Revenues		2,662,093,000	2,018,694,000
Operating earnings (loss) (2):
Lennar Homebuilding loss due to litigation accrual		0	140,000,000
Lennar Homebuilding | Treasure Island Holdings
Operating earnings (loss) (2):
Gain on sale of strategic joint venture		$ 164,900,000
Ownership interest in strategic joint venture		80.00%
Lennar Homebuilding | CalAtlantic Group, Inc.
Segment Reporting Information [Line Items]
Goodwill				$ 3,296,911,000
Operating Segments | Homebuilding East
Segment Reporting Information [Line Items]
Assets		$ 7,537,607,000			4,754,581,000
Revenues		1,070,654,000	767,726,000
Operating earnings (loss) (2):
Operating earnings		105,921,000	(55,709,000)
Lennar Homebuilding loss due to litigation accrual			140,000,000
Operating Segments | Homebuilding Central
Segment Reporting Information [Line Items]
Assets		3,609,537,000			2,037,905,000
Revenues		611,780,000	516,181,000
Operating earnings (loss) (2):
Operating earnings		42,546,000	52,858,000
Operating Segments | Homebuilding West
Segment Reporting Information [Line Items]
Assets		7,668,640,000			5,165,218,000
Revenues		779,879,000	552,798,000
Operating earnings (loss) (2):
Operating earnings		251,276,000	53,360,000
Operating Segments | Rialto
Segment Reporting Information [Line Items]
Assets		909,249,000			1,153,840,000
Revenues		54,302,000	82,006,000
Operating earnings (loss) (2):
Operating earnings		9,212,000	(843,000)
Operating Segments | Lennar Financial Services
Segment Reporting Information [Line Items]
Assets		1,748,432,000			1,689,508,000
Revenues		171,140,000	148,043,000
Operating earnings (loss) (2):
Operating earnings		19,695,000	20,664,000
Operating Segments | Lennar Multifamily
Segment Reporting Information [Line Items]
Assets		892,830,000			710,725,000
Revenues		93,256,000	88,685,000
Operating earnings (loss) (2):
Operating earnings		(1,201,000)	19,183,000
Homebuilding Other
Segment Reporting Information [Line Items]
Assets		1,547,102,000			960,541,000
Revenues		199,780,000	181,989,000
Operating earnings (loss) (2):
Operating earnings		13,984,000	$ 20,829,000
Corporate and unallocated
Segment Reporting Information [Line Items]
Assets		$ 4,030,626,000			$ 2,272,716,000

[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 February 28, 2018, total assets include $864.8 million related to consolidated VIEs of which $7.6 million is included in Lennar Homebuilding cash and cash equivalents, $0.1 million in Lennar Homebuilding receivables, net, $45.4 million in Lennar Homebuilding finished homes and construction in progress, $308.8 million in Lennar Homebuilding land and land under development, $366.7 million in Lennar Homebuilding consolidated inventory not owned, $4.5 million in Lennar Homebuilding investments in unconsolidated entities, $11.7 million in Lennar Homebuilding other assets, $20.0 million in Rialto assets and $100.0 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.