Supplemental Financial Information (Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	$ 243,590	$ 233,131	$ 473,972	$ 602,621
Distributions of earnings from guarantor and non-guarantor subsidiaries			0	0
Other adjustments to reconcile net earnings (including net loss attributable to noncontrolling interests) to net cash provided by operating activities			(146,259)	(605,701)
Net cash provided by (used in) operating activities			327,713	(3,080)
Cash flows from investing activities:
Proceeds from sale of operating properties and equipment			0	17,450
Investments in and contributions to unconsolidated entities, net of distributions of capital			(258,000)	(110,227)
Proceeds from sales of real estate owned			72,952	66,638
Receipts of principal payments on loans held-for-sale			5,937	0
Receipts of principal payments on loans receivable and other			73,948	57,733
Originations of loans receivable			(57,375)	(56,507)
Purchases of commercial mortgage-backed securities bonds			(70,187)	(33,005)
Acquisition, net of cash acquired			(611,399)	(725)
Other			(39,479)	(58,757)
Distributions of capital from guarantor and non-guarantor subsidiaries			0	0
Intercompany			0	0
Net cash used in investing activities			(957,551)	(116,675)
Cash flows from financing activities:
Redemption of senior notes			(658,595)	(250,000)
Conversions and exchanges on convertible senior notes			0	(233,893)
Net payments on other borrowings			20,632	(99,804)
Net payments related to noncontrolling interests			(51,483)	(97,912)
Excess tax benefits from share-based awards			1,980	7,039
Common stock:
Issuances			693	19,471
Repurchases			(27,104)	(19,871)
Dividends			(28,181)	(26,222)
Intercompany			0	0
Net cash (used in) provided by financing activities			138,035	(222,595)
Net decrease in cash and cash equivalents			(491,803)	(342,350)
Cash and cash equivalents at beginning of period			1,329,529	1,158,445
Cash and cash equivalents at end of period	837,726	816,095	837,726	816,095
Rialto
Cash flows from financing activities:
Net proceeds on Rialto notes payable			44,550
Principal payments on Rialto notes payable including structured notes			(18,944)	(4,121)
Common stock:
Cash and cash equivalents at beginning of period			148,827
Cash and cash equivalents at end of period	154,814		154,814
Senior Notes
Cash flows from financing activities:
Net proceeds from debt			1,233,303	495,043
Unsecured Revolving Credit Facility
Cash flows from financing activities:
Net (repayments) borrowings under credit facilities			0	125,000
Warehouse Repurchase Facility
Cash flows from financing activities:
Net (repayments) borrowings under credit facilities			(397,760)	(137,325)
Reportable Legal Entities | Lennar Corporation
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	249,165	235,842	500,890	598,391
Distributions of earnings from guarantor and non-guarantor subsidiaries			631,114	710,016
Other adjustments to reconcile net earnings (including net loss attributable to noncontrolling interests) to net cash provided by operating activities			(495,120)	(712,476)
Net cash provided by (used in) operating activities			636,884	595,931
Cash flows from investing activities:
Proceeds from sale of operating properties and equipment				0
Investments in and contributions to unconsolidated entities, net of distributions of capital			0	0
Proceeds from sales of real estate owned			0	0
Receipts of principal payments on loans held-for-sale			0
Receipts of principal payments on loans receivable and other				0
Originations of loans receivable			0	0
Purchases of commercial mortgage-backed securities bonds			0	0
Acquisition, net of cash acquired			(611,103)
Other			(6,174)	(8,836)
Distributions of capital from guarantor and non-guarantor subsidiaries			80,000	40,000
Intercompany			(1,200,426)	(956,734)
Net cash used in investing activities			(1,737,703)	(925,570)
Cash flows from financing activities:
Redemption of senior notes			(400,000)	(250,000)
Conversions and exchanges on convertible senior notes				(233,893)
Net payments on other borrowings			0
Net payments related to noncontrolling interests			0	0
Excess tax benefits from share-based awards			1,980	7,039
Common stock:
Issuances			693	19,471
Repurchases			(27,104)	(19,871)
Dividends			(28,181)	(26,222)
Intercompany			0	0
Net cash (used in) provided by financing activities			787,477	117,498
Net decrease in cash and cash equivalents			(313,342)	(212,141)
Cash and cash equivalents at beginning of period			697,112	575,821
Cash and cash equivalents at end of period	383,770	363,680	383,770	363,680
Reportable Legal Entities | Lennar Corporation | Rialto
Cash flows from financing activities:
Net proceeds on Rialto notes payable			0
Principal payments on Rialto notes payable including structured notes				0
Reportable Legal Entities | Lennar Corporation | Senior Notes
Cash flows from financing activities:
Net proceeds from debt			1,240,089	495,974
Reportable Legal Entities | Lennar Corporation | Unsecured Revolving Credit Facility
Cash flows from financing activities:
Net (repayments) borrowings under credit facilities				125,000
Reportable Legal Entities | Lennar Corporation | Warehouse Repurchase Facility
Cash flows from financing activities:
Net (repayments) borrowings under credit facilities			0	0
Reportable Legal Entities | Guarantor Subsidiaries
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	286,256	270,501	591,711	684,256
Distributions of earnings from guarantor and non-guarantor subsidiaries			50,785	42,297
Other adjustments to reconcile net earnings (including net loss attributable to noncontrolling interests) to net cash provided by operating activities			(596,338)	(707,332)
Net cash provided by (used in) operating activities			46,158	19,221
Cash flows from investing activities:
Proceeds from sale of operating properties and equipment				17,450
Investments in and contributions to unconsolidated entities, net of distributions of capital			(232,378)	(100,475)
Proceeds from sales of real estate owned			0	0
Receipts of principal payments on loans held-for-sale			0
Receipts of principal payments on loans receivable and other				0
Originations of loans receivable			0	0
Purchases of commercial mortgage-backed securities bonds			0	0
Acquisition, net of cash acquired			0
Other			(36,168)	(41,120)
Distributions of capital from guarantor and non-guarantor subsidiaries			80,000	40,000
Intercompany			0	0
Net cash used in investing activities			(188,546)	(84,145)
Cash flows from financing activities:
Redemption of senior notes			(258,595)	0
Conversions and exchanges on convertible senior notes				0
Net payments on other borrowings			(50,691)	(99,804)
Net payments related to noncontrolling interests
Excess tax benefits from share-based awards			0	0
Common stock:
Issuances			0	0
Repurchases			0	0
Dividends			(671,711)	(724,256)
Intercompany			951,237	782,877
Net cash (used in) provided by financing activities			(29,838)	(41,042)
Net decrease in cash and cash equivalents			(172,226)	(105,966)
Cash and cash equivalents at beginning of period			377,070	336,048
Cash and cash equivalents at end of period	204,844	230,082	204,844	230,082
Reportable Legal Entities | Guarantor Subsidiaries | Rialto
Cash flows from financing activities:
Net proceeds on Rialto notes payable			0
Principal payments on Rialto notes payable including structured notes				0
Reportable Legal Entities | Guarantor Subsidiaries | Senior Notes
Cash flows from financing activities:
Net proceeds from debt			0	0
Reportable Legal Entities | Guarantor Subsidiaries | Unsecured Revolving Credit Facility
Cash flows from financing activities:
Net (repayments) borrowings under credit facilities				0
Reportable Legal Entities | Guarantor Subsidiaries | Warehouse Repurchase Facility
Cash flows from financing activities:
Net (repayments) borrowings under credit facilities			(78)	141
Reportable Legal Entities | Non-Guarantor Subsidiaries
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	27,474	26,180	63,270	72,287
Distributions of earnings from guarantor and non-guarantor subsidiaries			0	0
Other adjustments to reconcile net earnings (including net loss attributable to noncontrolling interests) to net cash provided by operating activities			263,300	61,794
Net cash provided by (used in) operating activities			326,570	134,081
Cash flows from investing activities:
Proceeds from sale of operating properties and equipment				0
Investments in and contributions to unconsolidated entities, net of distributions of capital			(25,622)	(9,752)
Proceeds from sales of real estate owned			72,952	66,638
Receipts of principal payments on loans held-for-sale			5,937
Receipts of principal payments on loans receivable and other				57,733
Originations of loans receivable			(57,375)	(56,507)
Purchases of commercial mortgage-backed securities bonds			(70,187)	(33,005)
Acquisition, net of cash acquired			(296)
Other			2,863	(8,801)
Distributions of capital from guarantor and non-guarantor subsidiaries			0	0
Intercompany			0	0
Net cash used in investing activities			(71,728)	16,306
Cash flows from financing activities:
Redemption of senior notes			0	0
Conversions and exchanges on convertible senior notes				0
Net payments on other borrowings			71,323
Net payments related to noncontrolling interests			(51,483)	(97,912)
Excess tax benefits from share-based awards			0	0
Common stock:
Issuances			0	0
Repurchases			0	0
Dividends			(170,188)	(108,057)
Intercompany			249,189	173,857
Net cash (used in) provided by financing activities			(261,077)	(174,630)
Net decrease in cash and cash equivalents			(6,235)	(24,243)
Cash and cash equivalents at beginning of period			255,347	246,576
Cash and cash equivalents at end of period	249,112	222,333	249,112	222,333
Reportable Legal Entities | Non-Guarantor Subsidiaries | Rialto
Cash flows from financing activities:
Net proceeds on Rialto notes payable			44,550
Principal payments on Rialto notes payable including structured notes				(4,121)
Reportable Legal Entities | Non-Guarantor Subsidiaries | Senior Notes
Cash flows from financing activities:
Net proceeds from debt			(6,786)	(931)
Reportable Legal Entities | Non-Guarantor Subsidiaries | Unsecured Revolving Credit Facility
Cash flows from financing activities:
Net (repayments) borrowings under credit facilities				0
Reportable Legal Entities | Non-Guarantor Subsidiaries | Warehouse Repurchase Facility
Cash flows from financing activities:
Net (repayments) borrowings under credit facilities			(397,682)	(137,466)
Consolidating Adjustments
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	(319,305)	(299,392)	(681,899)	(752,313)
Distributions of earnings from guarantor and non-guarantor subsidiaries			(681,899)	(752,313)
Other adjustments to reconcile net earnings (including net loss attributable to noncontrolling interests) to net cash provided by operating activities			681,899	752,313
Net cash provided by (used in) operating activities			(681,899)	(752,313)
Cash flows from investing activities:
Proceeds from sale of operating properties and equipment				0
Investments in and contributions to unconsolidated entities, net of distributions of capital			0	0
Proceeds from sales of real estate owned			0	0
Receipts of principal payments on loans held-for-sale			0
Receipts of principal payments on loans receivable and other				0
Originations of loans receivable			0	0
Purchases of commercial mortgage-backed securities bonds			0	0
Acquisition, net of cash acquired			0
Other			0	0
Distributions of capital from guarantor and non-guarantor subsidiaries			(160,000)	(80,000)
Intercompany			1,200,426	956,734
Net cash used in investing activities			1,040,426	876,734
Cash flows from financing activities:
Redemption of senior notes			0	0
Conversions and exchanges on convertible senior notes				0
Net payments on other borrowings			0	0
Net payments related to noncontrolling interests			0	0
Excess tax benefits from share-based awards			0	0
Common stock:
Issuances			0	0
Repurchases			0	0
Dividends			841,899	832,313
Intercompany			(1,200,426)	(956,734)
Net cash (used in) provided by financing activities			(358,527)	(124,421)
Net decrease in cash and cash equivalents			0	0
Cash and cash equivalents at beginning of period			0	0
Cash and cash equivalents at end of period	$ 0	$ 0	0	0
Consolidating Adjustments | Rialto
Cash flows from financing activities:
Net proceeds on Rialto notes payable			0
Principal payments on Rialto notes payable including structured notes				0
Consolidating Adjustments | Senior Notes
Cash flows from financing activities:
Net proceeds from debt			0	0
Consolidating Adjustments | Unsecured Revolving Credit Facility
Cash flows from financing activities:
Net (repayments) borrowings under credit facilities				0
Consolidating Adjustments | Warehouse Repurchase Facility
Cash flows from financing activities:
Net (repayments) borrowings under credit facilities			$ 0	$ 0