Supplemental Financial Information (Condensed Consolidating Statement of Operations and Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018
Revenues:
Revenues		$ 5,857,058	$ 5,672,569	$ 15,288,030	$ 14,112,421
Cost and expenses:
Acquisition and integration costs related to CalAtlantic		0	11,992	0	140,062
Corporate general and administrative		92,615	96,346	248,071	249,071
Total costs and expenses		5,208,701	5,101,824	13,717,299	13,049,625
Equity in earnings (loss) from unconsolidated entities				12,235	(8,115)
Earnings before income taxes		667,083	565,918	1,545,606	1,226,156
Benefit (provision) for income taxes	[1]	(154,440)	(98,298)	(374,670)	(306,870)
Equity in earnings from subsidiaries			0	0	0
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		512,643	467,620	1,170,936	919,286
Less: Net earnings (loss) attributable to noncontrolling interests		(723)	14,409	(3,812)	19,603
Net earnings attributable to Lennar		513,366	453,211	1,174,748	899,683
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on securities available-for-sale		180	(110)	949	(1,357)
Reclassification adjustments for loss included in earnings, net of tax		0	(166)	(176)	(292)
Total other comprehensive income (loss), net of tax		180	(276)	773	(1,649)
Total comprehensive income attributable to Lennar		513,546	452,935	1,175,521	898,034
Total comprehensive income (loss) attributable to noncontrolling interests		(723)	14,409	(3,812)	19,603
Homebuilding
Revenues:
Revenues		5,438,998	5,285,742	14,258,318	13,011,832
Cost and expenses:
Cost and expenses		4,781,932	4,671,088	12,608,026	11,711,184
Equity in earnings (loss) from unconsolidated entities		(10,459)	(16,739)	(4,601)	(43,537)
Other income (expense), net		12,375	10,839	(35,325)	190,713
Financial Services
Revenues:
Revenues		224,502	258,208	572,029	704,004
Cost and expenses:
Cost and expenses		149,804	197,693	422,142	561,853
Multifamily
Revenues:
Revenues		183,958	101,064	428,764	312,013
Cost and expenses:
Cost and expenses		181,616	103,187	431,510	317,572
Equity in earnings (loss) from unconsolidated entities		7,883	(1,730)	15,446	15,293
Lennar Other
Revenues:
Revenues		9,600	27,555	28,919	84,572
Cost and expenses:
Cost and expenses		2,734	21,518	7,550	69,883
Equity in earnings (loss) from unconsolidated entities		8,903	6,614	12,255	20,129
Other income (expense), net		24	(3,811)	(12,900)	(19,238)
Earnings before income taxes					1,226,156
Reportable Legal Entities | Lennar Corporation
Revenues:
Revenues		0	0	0	0
Cost and expenses:
Acquisition and integration costs related to CalAtlantic			0		0
Corporate general and administrative		86,846	94,476	238,696	243,361
Total costs and expenses		86,846	94,476	238,696	243,361
Earnings before income taxes		(86,999)	(89,862)	(239,479)
Benefit (provision) for income taxes		19,816	13,688	57,906	59,210
Equity in earnings from subsidiaries		580,549	529,385	1,356,321	1,073,307
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		513,366	453,211	1,174,748	899,683
Less: Net earnings (loss) attributable to noncontrolling interests		0	0	0	0
Net earnings attributable to Lennar		513,366	453,211	1,174,748	899,683
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on securities available-for-sale		0	0	0	0
Reclassification adjustments for loss included in earnings, net of tax			0	0	0
Total other comprehensive income (loss), net of tax		0	0	0	0
Total comprehensive income attributable to Lennar		513,366	453,211	1,174,748	899,683
Total comprehensive income (loss) attributable to noncontrolling interests		0	0	0	0
Reportable Legal Entities | Lennar Corporation | Homebuilding
Revenues:
Revenues		0	0	0	0
Cost and expenses:
Cost and expenses		0	0	0	0
Equity in earnings (loss) from unconsolidated entities		0	0	0	0
Other income (expense), net		(153)	4,614	(783)	10,527
Reportable Legal Entities | Lennar Corporation | Financial Services
Revenues:
Revenues		0	0	0	0
Cost and expenses:
Cost and expenses		0	0	0	0
Reportable Legal Entities | Lennar Corporation | Multifamily
Revenues:
Revenues		0	0	0	0
Cost and expenses:
Cost and expenses		0	0	0	0
Equity in earnings (loss) from unconsolidated entities		0	0	0	0
Reportable Legal Entities | Lennar Corporation | Lennar Other
Revenues:
Revenues		0	0	0	0
Cost and expenses:
Cost and expenses		0	0	0	0
Equity in earnings (loss) from unconsolidated entities		0	0	0	0
Other income (expense), net		0	0	0	0
Earnings before income taxes					(232,834)
Reportable Legal Entities | Guarantor Subsidiaries
Revenues:
Revenues		5,450,011	5,370,286	14,324,611	13,219,518
Cost and expenses:
Acquisition and integration costs related to CalAtlantic			11,992		140,062
Corporate general and administrative		4,503	604	5,579	1,813
Total costs and expenses		4,781,062	4,751,988	12,628,509	12,036,733
Earnings before income taxes		666,156	610,300	1,640,364
Benefit (provision) for income taxes		(151,808)	(101,924)	(394,383)	(327,148)
Equity in earnings from subsidiaries		42,876	19,889	76,352	58,807
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		557,224	528,265	1,322,333	1,055,410
Less: Net earnings (loss) attributable to noncontrolling interests		0	0	0	0
Net earnings attributable to Lennar		557,224	528,265	1,322,333	1,055,410
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on securities available-for-sale		0	0	0	0
Reclassification adjustments for loss included in earnings, net of tax			0	0	0
Total other comprehensive income (loss), net of tax		0	0	0	0
Total comprehensive income attributable to Lennar		557,224	528,265	1,322,333	1,055,410
Total comprehensive income (loss) attributable to noncontrolling interests		0	0	0	0
Reportable Legal Entities | Guarantor Subsidiaries | Homebuilding
Revenues:
Revenues		5,413,602	5,266,053	14,202,932	12,942,016
Cost and expenses:
Cost and expenses		4,758,852	4,649,490	12,546,016	11,640,728
Equity in earnings (loss) from unconsolidated entities		(10,455)	(16,995)	(4,869)	(43,756)
Other income (expense), net		7,101	7,618	(43,845)	182,870
Reportable Legal Entities | Guarantor Subsidiaries | Financial Services
Revenues:
Revenues		36,409	104,233	121,679	277,502
Cost and expenses:
Cost and expenses		17,707	89,902	76,914	254,130
Reportable Legal Entities | Guarantor Subsidiaries | Multifamily
Revenues:
Revenues		0	0	0	0
Cost and expenses:
Cost and expenses		0	0	0	0
Equity in earnings (loss) from unconsolidated entities		0	0	0	0
Reportable Legal Entities | Guarantor Subsidiaries | Lennar Other
Revenues:
Revenues		0	0	0	0
Cost and expenses:
Cost and expenses		0	0	0	0
Equity in earnings (loss) from unconsolidated entities		561	1,257	(7,024)	1,852
Other income (expense), net		0	122	0	0
Earnings before income taxes					1,323,751
Reportable Legal Entities | Non-Guarantor Subsidiaries
Revenues:
Revenues		411,914	307,304	978,007	907,918
Cost and expenses:
Acquisition and integration costs related to CalAtlantic			0		0
Corporate general and administrative		0	0	0	0
Total costs and expenses		345,507	264,985	863,896	795,044
Earnings before income taxes		87,926	45,480	144,721
Benefit (provision) for income taxes		(22,448)	(10,062)	(38,193)	(38,932)
Equity in earnings from subsidiaries			0	0	0
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		65,478	35,418	106,528	96,307
Less: Net earnings (loss) attributable to noncontrolling interests		(723)	14,409	(3,812)	19,603
Net earnings attributable to Lennar		66,201	21,009	110,340	76,704
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on securities available-for-sale		180	(110)	949	(1,357)
Reclassification adjustments for loss included in earnings, net of tax			(166)	(176)	(292)
Total other comprehensive income (loss), net of tax		180	(276)	773	(1,649)
Total comprehensive income attributable to Lennar		66,381	20,733	111,113	75,055
Total comprehensive income (loss) attributable to noncontrolling interests		(723)	14,409	(3,812)	19,603
Reportable Legal Entities | Non-Guarantor Subsidiaries | Homebuilding
Revenues:
Revenues		25,396	19,689	55,386	69,816
Cost and expenses:
Cost and expenses		24,009	18,211	55,910	69,826
Equity in earnings (loss) from unconsolidated entities		(4)	256	268	219
Other income (expense), net		5,274	3,211	8,517	7,814
Reportable Legal Entities | Non-Guarantor Subsidiaries | Financial Services
Revenues:
Revenues		192,960	158,996	464,938	441,517
Cost and expenses:
Cost and expenses		137,148	118,856	368,926	331,181
Reportable Legal Entities | Non-Guarantor Subsidiaries | Multifamily
Revenues:
Revenues		183,958	101,064	428,764	312,013
Cost and expenses:
Cost and expenses		181,616	103,187	431,510	317,572
Equity in earnings (loss) from unconsolidated entities		7,883	(1,730)	15,446	15,293
Reportable Legal Entities | Non-Guarantor Subsidiaries | Lennar Other
Revenues:
Revenues		9,600	27,555	28,919	84,572
Cost and expenses:
Cost and expenses		2,734	24,731	7,550	76,465
Equity in earnings (loss) from unconsolidated entities		8,342	5,357	19,279	18,277
Other income (expense), net		24	(3,933)	(12,900)	(19,238)
Earnings before income taxes					135,239
Consolidating Adjustments
Revenues:
Revenues		(4,867)	(5,021)	(14,588)	(15,015)
Cost and expenses:
Acquisition and integration costs related to CalAtlantic			0		0
Corporate general and administrative		1,266	1,266	3,796	3,897
Total costs and expenses		(4,714)	(9,625)	(13,802)	(25,513)
Earnings before income taxes		0	0	0
Benefit (provision) for income taxes		0	0	0	0
Equity in earnings from subsidiaries		(623,425)	(549,274)	(1,432,673)	(1,132,114)
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		(623,425)	(549,274)	(1,432,673)	(1,132,114)
Less: Net earnings (loss) attributable to noncontrolling interests		0	0	0	0
Net earnings attributable to Lennar		(623,425)	(549,274)	(1,432,673)	(1,132,114)
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on securities available-for-sale		0	0	0	0
Reclassification adjustments for loss included in earnings, net of tax			0	0	0
Total other comprehensive income (loss), net of tax		0	0	0	0
Total comprehensive income attributable to Lennar		(623,425)	(549,274)	(1,432,673)	(1,132,114)
Total comprehensive income (loss) attributable to noncontrolling interests		0	0	0	0
Consolidating Adjustments | Homebuilding
Revenues:
Revenues		0	0	0	0
Cost and expenses:
Cost and expenses		(929)	3,387	6,100	630
Equity in earnings (loss) from unconsolidated entities		0	0	0	0
Other income (expense), net		153	(4,604)	786	(10,498)
Consolidating Adjustments | Financial Services
Revenues:
Revenues		(4,867)	(5,021)	(14,588)	(15,015)
Cost and expenses:
Cost and expenses		(5,051)	(11,065)	(23,698)	(23,458)
Consolidating Adjustments | Multifamily
Revenues:
Revenues		0	0	0	0
Cost and expenses:
Cost and expenses		0	0	0	0
Equity in earnings (loss) from unconsolidated entities		0	0	0	0
Consolidating Adjustments | Lennar Other
Revenues:
Revenues		0	0	0	0
Cost and expenses:
Cost and expenses		0	(3,213)	0	(6,582)
Equity in earnings (loss) from unconsolidated entities		0	0	0	0
Other income (expense), net		$ 0	$ 0	$ 0	0
Earnings before income taxes					$ 0

[1] Provision for income taxes for the nine months ended August 31, 2018 includes a non-cash one-time write down of deferred tax assets of $68.6 million resulting from the Tax Cuts and Jobs Act enacted in December 2017.