Supplemental Financial Information (Condensed Consolidating Statement of Operations and Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended
		Feb. 28, 2018	Feb. 28, 2017
Revenues:
Revenues		$ 2,980,791	$ 2,337,428
Cost and expenses:
Corporate general and administrative		67,810	60,699
Acquisition and integration costs related to CalAtlantic		104,195	0
Total costs and expenses		2,870,069	2,149,201
Equity in earnings (loss) from unconsolidated entities		(2,431)	12,335
Earnings before income taxes		269,428	49,643
Benefit (provision) for income taxes	[1]	(132,611)	(19,969)
Equity in earnings from subsidiaries			0
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		136,817	29,674
Less: Net earnings (loss) attributable to noncontrolling interests		602	(8,406)
Net earnings attributable to Lennar		136,215	38,080
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on securities available-for-sale		(658)	972
Total other comprehensive income (loss), net of tax		(658)	972
Other comprehensive income attributable to Lennar		135,557	39,052
Total comprehensive income (loss) attributable to noncontrolling interests		602	(8,406)
Lennar Homebuilding
Revenues:
Revenues		2,662,093	2,018,694
Cost and expenses:
Cost and expenses		2,404,007	1,801,561
Equity in earnings (loss) from unconsolidated entities		(14,287)	(11,534)
Other income (expense), net		169,928	5,739
Lennar Homebuilding loss due to litigation accrual		0	(140,000)
Lennar Financial Services
Revenues:
Revenues		171,140	148,043
Cost and expenses:
Cost and expenses		151,445	127,379
Rialto
Revenues:
Revenues		54,302	82,006
Cost and expenses:
Cost and expenses		45,413	66,913
Equity in earnings (loss) from unconsolidated entities		9,114	722
Other income (expense), net		(8,791)	(16,658)
Lennar Multifamily
Revenues:
Revenues		93,256	88,685
Cost and expenses:
Cost and expenses		97,199	92,649
Equity in earnings (loss) from unconsolidated entities		2,742	23,147
Reportable Legal Entities | Lennar Corporation
Revenues:
Revenues		0	0
Cost and expenses:
Corporate general and administrative		65,923	59,179
Acquisition and integration costs related to CalAtlantic		0
Total costs and expenses		65,923	59,179
Earnings before income taxes		(63,988)	(59,430)
Benefit (provision) for income taxes		31,565	20,444
Equity in earnings from subsidiaries		168,638	77,066
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		136,215	38,080
Less: Net earnings (loss) attributable to noncontrolling interests		0
Net earnings attributable to Lennar		136,215	38,080
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on securities available-for-sale		0	0
Total other comprehensive income (loss), net of tax		0	0
Other comprehensive income attributable to Lennar		136,215	38,080
Total comprehensive income (loss) attributable to noncontrolling interests		0	0
Reportable Legal Entities | Lennar Corporation | Lennar Homebuilding
Revenues:
Revenues		0	0
Cost and expenses:
Cost and expenses		0	0
Equity in earnings (loss) from unconsolidated entities		0	0
Other income (expense), net		1,935	(251)
Lennar Homebuilding loss due to litigation accrual			0
Reportable Legal Entities | Lennar Corporation | Lennar Financial Services
Revenues:
Revenues		0	0
Cost and expenses:
Cost and expenses		0	0
Reportable Legal Entities | Lennar Corporation | Rialto
Revenues:
Revenues		0	0
Cost and expenses:
Cost and expenses		0	0
Equity in earnings (loss) from unconsolidated entities		0	0
Other income (expense), net		0	0
Reportable Legal Entities | Lennar Corporation | Lennar Multifamily
Revenues:
Revenues		0	0
Cost and expenses:
Cost and expenses		0	0
Equity in earnings (loss) from unconsolidated entities		0	0
Reportable Legal Entities | Guarantor Subsidiaries
Revenues:
Revenues		2,726,206	2,063,391
Cost and expenses:
Corporate general and administrative		604	255
Acquisition and integration costs related to CalAtlantic		104,195
Total costs and expenses		2,573,079	1,843,321
Earnings before income taxes		307,292	73,283
Benefit (provision) for income taxes		(150,443)	(23,344)
Equity in earnings from subsidiaries		10,200	6,893
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		167,049	56,832
Less: Net earnings (loss) attributable to noncontrolling interests		0
Net earnings attributable to Lennar		167,049	56,832
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on securities available-for-sale		0	0
Total other comprehensive income (loss), net of tax		0	0
Other comprehensive income attributable to Lennar		167,049	56,832
Total comprehensive income (loss) attributable to noncontrolling interests		0	0
Reportable Legal Entities | Guarantor Subsidiaries | Lennar Homebuilding
Revenues:
Revenues		2,653,194	2,012,882
Cost and expenses:
Cost and expenses		2,393,804	1,794,010
Equity in earnings (loss) from unconsolidated entities		(14,131)	(11,560)
Other income (expense), net		168,296	4,773
Lennar Homebuilding loss due to litigation accrual			(140,000)
Reportable Legal Entities | Guarantor Subsidiaries | Lennar Financial Services
Revenues:
Revenues		73,012	50,509
Cost and expenses:
Cost and expenses		74,476	49,056
Reportable Legal Entities | Guarantor Subsidiaries | Rialto
Revenues:
Revenues		0	0
Cost and expenses:
Cost and expenses		0	0
Equity in earnings (loss) from unconsolidated entities		0	0
Other income (expense), net		0	0
Reportable Legal Entities | Guarantor Subsidiaries | Lennar Multifamily
Revenues:
Revenues		0	0
Cost and expenses:
Cost and expenses		0	0
Equity in earnings (loss) from unconsolidated entities		0	0
Reportable Legal Entities | Non-Guarantor Subsidiaries
Revenues:
Revenues		259,559	279,067
Cost and expenses:
Corporate general and administrative		0	0
Acquisition and integration costs related to CalAtlantic		0
Total costs and expenses		237,967	251,470
Earnings before income taxes		26,124	35,790
Benefit (provision) for income taxes		(13,733)	(17,069)
Equity in earnings from subsidiaries			0
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		12,391	18,721
Less: Net earnings (loss) attributable to noncontrolling interests		602	(8,406)
Net earnings attributable to Lennar		11,789	27,127
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on securities available-for-sale		(658)	972
Total other comprehensive income (loss), net of tax		(658)	972
Other comprehensive income attributable to Lennar		11,131	28,099
Total comprehensive income (loss) attributable to noncontrolling interests		602	(8,406)
Reportable Legal Entities | Non-Guarantor Subsidiaries | Lennar Homebuilding
Revenues:
Revenues		8,899	5,812
Cost and expenses:
Cost and expenses		12,237	7,868
Equity in earnings (loss) from unconsolidated entities		(156)	26
Other income (expense), net		1,623	956
Lennar Homebuilding loss due to litigation accrual			0
Reportable Legal Entities | Non-Guarantor Subsidiaries | Lennar Financial Services
Revenues:
Revenues		103,102	102,532
Cost and expenses:
Cost and expenses		83,118	83,988
Reportable Legal Entities | Non-Guarantor Subsidiaries | Rialto
Revenues:
Revenues		54,302	82,006
Cost and expenses:
Cost and expenses		45,413	66,965
Equity in earnings (loss) from unconsolidated entities		9,114	722
Other income (expense), net		(8,791)	(16,658)
Reportable Legal Entities | Non-Guarantor Subsidiaries | Lennar Multifamily
Revenues:
Revenues		93,256	88,717
Cost and expenses:
Cost and expenses		97,199	92,649
Equity in earnings (loss) from unconsolidated entities		2,742	23,147
Consolidating Adjustments
Revenues:
Revenues		(4,974)	(5,030)
Cost and expenses:
Corporate general and administrative		1,283	1,265
Acquisition and integration costs related to CalAtlantic		0
Total costs and expenses		(6,900)	(4,769)
Earnings before income taxes		0	0
Benefit (provision) for income taxes		0	0
Equity in earnings from subsidiaries		(178,838)	(83,959)
Net earnings (including net earnings (loss) attributable to noncontrolling interests)		(178,838)	(83,959)
Less: Net earnings (loss) attributable to noncontrolling interests		0
Net earnings attributable to Lennar		(178,838)	(83,959)
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on securities available-for-sale		0	0
Total other comprehensive income (loss), net of tax		0	0
Other comprehensive income attributable to Lennar		(178,838)	(83,959)
Total comprehensive income (loss) attributable to noncontrolling interests		0	0
Consolidating Adjustments | Lennar Homebuilding
Revenues:
Revenues		0	0
Cost and expenses:
Cost and expenses		(2,034)	(317)
Equity in earnings (loss) from unconsolidated entities		0	0
Other income (expense), net		(1,926)	261
Lennar Homebuilding loss due to litigation accrual			0
Consolidating Adjustments | Lennar Financial Services
Revenues:
Revenues		(4,974)	(4,998)
Cost and expenses:
Cost and expenses		(6,149)	(5,665)
Consolidating Adjustments | Rialto
Revenues:
Revenues		0	0
Cost and expenses:
Cost and expenses		0	(52)
Equity in earnings (loss) from unconsolidated entities		0	0
Other income (expense), net		0	0
Consolidating Adjustments | Lennar Multifamily
Revenues:
Revenues		0	(32)
Cost and expenses:
Cost and expenses		0	0
Equity in earnings (loss) from unconsolidated entities		$ 0	$ 0

[1] Provision for income taxes for the three months ended February 28, 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.