Supplemental Financial Information (Condensed Consolidating Statement of Operations and Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2018	Aug. 31, 2017
Revenues:
Revenues		$ 5,672,569	$ 3,261,476	$ 14,112,421	$ 8,860,796
Cost and expenses:
Acquisition and integration costs related to CalAtlantic		11,992	0	140,062	0
Corporate general and administrative		96,346	72,860	249,071	200,333
Total costs and expenses		5,101,824	2,886,383	13,049,625	7,964,251
Equity in earnings (loss) from unconsolidated entities				(8,115)	12,838
Earnings before income taxes		565,918	368,385	1,226,156	727,628
Benefit (provision) for income taxes	[1]	(98,298)	(124,795)	(306,870)	(253,656)
Equity in earnings from subsidiaries			0		0
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		467,620	243,590	919,286	473,972
Less: Net earnings (loss) attributable to noncontrolling interests		14,409	(5,575)	19,603	(26,918)
Net earnings attributable to Lennar		453,211	249,165	899,683	500,890
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on securities available-for-sale		(110)	165	(1,357)	1,556
Reclassification adjustments for loss included in earnings, net of tax		(166)	0	(292)	4
Total other comprehensive income (loss), net of tax		(276)	165	(1,649)	1,560
Total comprehensive income attributable to Lennar		452,935	249,330	898,034	502,450
Total comprehensive income (loss) attributable to noncontrolling interests		14,409	(5,575)	19,603	(26,918)
Lennar Homebuilding
Revenues:
Revenues		5,285,742	2,885,195	13,011,832	7,789,630
Cost and expenses:
Cost and expenses		4,671,224	2,492,065	11,711,298	6,829,109
Equity in earnings (loss) from unconsolidated entities		(15,391)	(9,651)	(41,904)	(42,691)
Other income (expense), net		12,910	2,797	192,662	12,364
Lennar Homebuilding loss due to litigation accrual		0	0	0	(140,000)
Lennar Financial Services
Revenues:
Revenues		236,268	215,056	639,543	571,462
Cost and expenses:
Cost and expenses		179,640	165,999	510,838	458,014
Rialto
Revenues:
Revenues		49,495	57,810	149,033	207,804
Cost and expenses:
Cost and expenses		39,435	49,503	120,784	175,492
Equity in earnings (loss) from unconsolidated entities		5,266	4,858	18,496	11,310
Other income (expense), net		(5,882)	(16,357)	(21,187)	(54,119)
Lennar Multifamily
Revenues:
Revenues		101,064	103,415	312,013	291,900
Cost and expenses:
Cost and expenses		103,187	105,956	317,572	301,303
Equity in earnings (loss) from unconsolidated entities		(1,730)	11,645	15,293	44,219
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		94,476	71,285	243,361	195,681
Total costs and expenses		94,476	71,285	243,361	195,681
Earnings before income taxes		(89,862)	(71,352)	(232,834)	(196,179)
Benefit (provision) for income taxes		13,688	23,689	59,210	65,955
Equity in earnings from subsidiaries		529,385	296,828	1,073,307	631,114
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		453,211	249,165	899,683	500,890
Less: Net earnings (loss) attributable to noncontrolling interests		0
Net earnings attributable to Lennar		453,211	249,165	899,683	500,890
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		453,211	249,165	899,683	500,890
Total comprehensive income (loss) attributable to noncontrolling interests		0	0	0	0
Reportable Legal Entities | Lennar Corporation | Lennar 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		4,614	(67)	10,527	(498)
Lennar Homebuilding loss due to litigation accrual					0
Reportable Legal Entities | Lennar Corporation | Lennar Financial Services
Revenues:
Revenues		0	0	0	0
Cost and expenses:
Cost and expenses		0	0	0	0
Reportable Legal Entities | Lennar Corporation | Rialto
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
Reportable Legal Entities | Lennar Corporation | Lennar 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
Revenues:
Revenues		5,370,286	2,963,140	13,219,518	7,988,739
Cost and expenses:
Acquisition and integration costs related to CalAtlantic		11,992		140,062
Corporate general and administrative		604	310	1,813	856
Total costs and expenses		4,751,988	2,562,788	12,036,733	7,009,149
Earnings before income taxes		610,610	391,949	1,323,751	804,812
Benefit (provision) for income taxes		(101,924)	(128,170)	(327,148)	(263,886)
Equity in earnings from subsidiaries		19,889	22,477	58,807	50,785
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		528,575	286,256	1,055,410	591,711
Less: Net earnings (loss) attributable to noncontrolling interests		0
Net earnings attributable to Lennar		528,575	286,256	1,055,410	591,711
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		528,575	286,256	1,055,410	591,711
Total comprehensive income (loss) attributable to noncontrolling interests		0	0	0	0
Reportable Legal Entities | Guarantor Subsidiaries | Lennar Homebuilding
Revenues:
Revenues		5,266,053	2,872,920	12,942,016	7,761,414
Cost and expenses:
Cost and expenses		4,649,490	2,483,401	11,640,728	6,802,418
Equity in earnings (loss) from unconsolidated entities		(15,428)	(9,647)	(41,904)	(42,675)
Other income (expense), net		7,740	1,244	182,870	7,897
Lennar Homebuilding loss due to litigation accrual					(140,000)
Reportable Legal Entities | Guarantor Subsidiaries | Lennar Financial Services
Revenues:
Revenues		104,233	90,220	277,502	227,325
Cost and expenses:
Cost and expenses		89,902	79,077	254,130	205,875
Reportable Legal Entities | Guarantor Subsidiaries | Rialto
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
Reportable Legal Entities | Guarantor Subsidiaries | Lennar 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 | Non-Guarantor Subsidiaries
Revenues:
Revenues		307,304	303,395	907,918	887,181
Cost and expenses:
Acquisition and integration costs related to CalAtlantic		0		0
Corporate general and administrative		0	0	0	0
Total costs and expenses		264,985	257,293	795,044	774,018
Earnings before income taxes		45,170	47,788	135,239	118,995
Benefit (provision) for income taxes		(10,062)	(20,314)	(38,932)	(55,725)
Equity in earnings from subsidiaries			0		0
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		35,108	27,474	96,307	63,270
Less: Net earnings (loss) attributable to noncontrolling interests		14,409	(5,575)	19,603	(26,918)
Net earnings attributable to Lennar		20,699	33,049	76,704	90,188
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on securities available-for-sale		(110)	165	(1,357)	1,556
Reclassification adjustments for loss included in earnings, net of tax		(166)		(292)	4
Total other comprehensive income (loss), net of tax		(276)	165	(1,649)	1,560
Total comprehensive income attributable to Lennar		20,423	33,214	75,055	91,748
Total comprehensive income (loss) attributable to noncontrolling interests		14,409	(5,575)	19,603	(26,918)
Reportable Legal Entities | Non-Guarantor Subsidiaries | Lennar Homebuilding
Revenues:
Revenues		19,689	12,275	69,816	28,216
Cost and expenses:
Cost and expenses		18,347	12,107	69,940	30,693
Equity in earnings (loss) from unconsolidated entities		37	(4)	0	(16)
Other income (expense), net		5,160	1,544	9,763	4,438
Lennar Homebuilding loss due to litigation accrual					0
Reportable Legal Entities | Non-Guarantor Subsidiaries | Lennar Financial Services
Revenues:
Revenues		137,056	129,853	377,056	359,152
Cost and expenses:
Cost and expenses		100,803	89,656	280,166	266,317
Reportable Legal Entities | Non-Guarantor Subsidiaries | Rialto
Revenues:
Revenues		49,495	57,810	149,033	207,804
Cost and expenses:
Cost and expenses		42,648	49,574	127,366	175,705
Equity in earnings (loss) from unconsolidated entities		5,266	4,858	18,496	11,310
Other income (expense), net		(5,882)	(16,357)	(21,187)	(54,119)
Reportable Legal Entities | Non-Guarantor Subsidiaries | Lennar Multifamily
Revenues:
Revenues		101,064	103,457	312,013	292,009
Cost and expenses:
Cost and expenses		103,187	105,956	317,572	301,303
Equity in earnings (loss) from unconsolidated entities		(1,730)	11,645	15,293	44,219
Consolidating Adjustments
Revenues:
Revenues		(5,021)	(5,059)	(15,015)	(15,124)
Cost and expenses:
Acquisition and integration costs related to CalAtlantic		0		0
Corporate general and administrative		1,266	1,265	3,897	3,796
Total costs and expenses		(9,625)	(4,983)	(25,513)	(14,597)
Earnings before income taxes		0	0	0	0
Benefit (provision) for income taxes		0	0		0
Equity in earnings from subsidiaries		(549,274)	(319,305)	(1,132,114)	(681,899)
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		(549,274)	(319,305)	(1,132,114)	(681,899)
Less: Net earnings (loss) attributable to noncontrolling interests		0
Net earnings attributable to Lennar		(549,274)	(319,305)	(1,132,114)	(681,899)
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		(549,274)	(319,305)	(1,132,114)	(681,899)
Total comprehensive income (loss) attributable to noncontrolling interests		0	0	0	0
Consolidating Adjustments | Lennar Homebuilding
Revenues:
Revenues		0	0	0	0
Cost and expenses:
Cost and expenses		3,387	(3,443)	630	(4,002)
Equity in earnings (loss) from unconsolidated entities		0	0	0	0
Other income (expense), net		(4,604)	76	(10,498)	527
Lennar Homebuilding loss due to litigation accrual					0
Consolidating Adjustments | Lennar Financial Services
Revenues:
Revenues		(5,021)	(5,017)	(15,015)	(15,015)
Cost and expenses:
Cost and expenses		(11,065)	(2,734)	(23,458)	(14,178)
Consolidating Adjustments | Rialto
Revenues:
Revenues		0	0	0	0
Cost and expenses:
Cost and expenses		(3,213)	(71)	(6,582)	(213)
Equity in earnings (loss) from unconsolidated entities		0	0	0	0
Other income (expense), net		0	0	0	0
Consolidating Adjustments | Lennar Multifamily
Revenues:
Revenues		0	(42)	0	(109)
Cost and expenses:
Cost and expenses		0	0	0	0
Equity in earnings (loss) from unconsolidated entities		$ 0	$ 0	$ 0	$ 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.