Supplemental Financial Information (Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2018	Aug. 31, 2017
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	$ 467,620	$ 243,590	$ 919,286	$ 473,972
Distributions of earnings from guarantor and non-guarantor subsidiaries			0	0
Other adjustments to reconcile net earnings (including net earnings attributable to noncontrolling interests) to net cash provided by operating activities			(170,615)	(146,259)
Net cash provided by operating activities			748,671	327,713
Cash flows from investing activities:
Investments in and contributions to unconsolidated entities, net of distributions of capital			(74,579)	(258,000)
Proceeds from sales of real estate owned			28,697	72,952
Originations of loans receivable			0	57,375
Receipts of principal payments on loans receivable and other				5,937
Proceeds from sale of investment in unconsolidated entity			199,654	0
Purchases of commercial mortgage-backed securities bonds			(31,068)	(70,187)
Acquisitions, net of cash acquired			(1,103,338)	(611,399)
Other			(52,408)	(39,479)
Distributions of capital from guarantor and non-guarantor subsidiaries			0	0
Intercompany			0	0
Net cash used in investing activities			(1,033,042)	(957,551)
Cash flows from financing activities:
Debt issuance costs			(12,459)	(16,697)
Redemption of senior notes			(825,000)	(658,595)
Conversions and exchanges of convertible senior notes			(59,145)	0
Net payments related to noncontrolling interests			(368,913)	20,632
Net payments related to noncontrolling interests			(64,619)	(51,483)
Excess tax benefits from share-based awards			0	1,980
Common stock:
Issuances			3,189	693
Repurchases			(49,490)	(27,104)
Dividends			(35,985)	(28,181)
Intercompany			0	0
Net cash provided by (used in) financing activities			(1,318,085)	138,035
Net decrease in cash and cash equivalents			(1,602,456)	(491,803)
Cash and cash equivalents at beginning of period			2,650,872	1,329,529
Cash and cash equivalents at end of period	1,048,416	837,726	1,048,416	837,726
Rialto
Cash flows from financing activities:
Net proceeds on Rialto notes payable				44,550
Common stock:
Cash and cash equivalents at beginning of period			241,861
Cash and cash equivalents at end of period	36,343		36,343
Senior Notes
Cash flows from financing activities:
Proceeds from senior notes and debt issuance costs				1,233,303
Debt issuance costs			(12,459)
Unsecured Revolving Credit Facility
Cash flows from financing activities:
Net borrowings under credit facilities			195,300	0
Warehouse Repurchase Facility
Cash flows from financing activities:
Net borrowings under credit facilities			(100,963)	(397,760)
Reportable Legal Entities | Lennar Corporation
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	453,211	249,165	899,683	500,890
Distributions of earnings from guarantor and non-guarantor subsidiaries			1,073,307	631,114
Other adjustments to reconcile net earnings (including net earnings attributable to noncontrolling interests) to net cash provided by operating activities			(1,142,961)	(495,120)
Net cash provided by operating activities			830,029	636,884
Cash flows from investing activities:
Investments in and contributions to unconsolidated entities, net of distributions of capital			0	0
Proceeds from sales of real estate owned			0	0
Originations of loans receivable				0
Receipts of principal payments on loans receivable and other				0
Proceeds from sale of investment in unconsolidated entity			0
Purchases of commercial mortgage-backed securities bonds			0	0
Acquisitions, net of cash acquired			(1,162,342)	(611,103)
Other			(27,136)	(6,174)
Distributions of capital from guarantor and non-guarantor subsidiaries			65,000	80,000
Intercompany			(1,035,226)	(1,200,426)
Net cash used in investing activities			(2,159,704)	(1,737,703)
Cash flows from financing activities:
Redemption of senior notes			(735,626)	(400,000)
Conversions and exchanges of convertible senior notes			0
Net payments related to noncontrolling interests			0
Net payments related to noncontrolling interests			0	0
Excess tax benefits from share-based awards			0	1,980
Common stock:
Issuances			3,189	693
Repurchases			(49,490)	(27,104)
Dividends			(35,985)	(28,181)
Intercompany			0	0
Net cash provided by (used in) financing activities			(177,101)	787,477
Net decrease in cash and cash equivalents			(1,506,776)	(313,342)
Cash and cash equivalents at beginning of period			1,937,674	697,112
Cash and cash equivalents at end of period	430,898	383,770	430,898	383,770
Reportable Legal Entities | Lennar Corporation | Rialto
Cash flows from financing activities:
Net proceeds on Rialto notes payable				0
Reportable Legal Entities | Lennar Corporation | Senior Notes
Cash flows from financing activities:
Proceeds from senior notes and debt issuance costs				1,240,089
Debt issuance costs			(9,189)
Reportable Legal Entities | Lennar Corporation | Unsecured Revolving Credit Facility
Cash flows from financing activities:
Net borrowings under credit facilities			650,000
Reportable Legal Entities | Lennar Corporation | Warehouse Repurchase Facility
Cash flows from financing activities:
Net 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)	528,575	286,256	1,055,410	591,711
Distributions of earnings from guarantor and non-guarantor subsidiaries			58,807	50,785
Other adjustments to reconcile net earnings (including net earnings attributable to noncontrolling interests) to net cash provided by operating activities			(83,976)	(596,338)
Net cash provided by operating activities			1,030,241	46,158
Cash flows from investing activities:
Investments in and contributions to unconsolidated entities, net of distributions of capital			(67,664)	(232,378)
Proceeds from sales of real estate owned			0	0
Originations of loans receivable				0
Receipts of principal payments on loans receivable and other				0
Proceeds from sale of investment in unconsolidated entity			199,654
Purchases of commercial mortgage-backed securities bonds			0	0
Acquisitions, net of cash acquired			22,654	0
Other			(20,555)	(36,168)
Distributions of capital from guarantor and non-guarantor subsidiaries			20,000	80,000
Intercompany			0	0
Net cash used in investing activities			154,089	(188,546)
Cash flows from financing activities:
Redemption of senior notes			(89,374)	(258,595)
Conversions and exchanges of convertible senior notes			(59,145)
Net payments related to noncontrolling interests			(78,528)	(50,691)
Net payments related to noncontrolling interests
Excess tax benefits from share-based awards			0	0
Common stock:
Issuances			0	0
Repurchases			0	0
Dividends			(1,120,410)	(671,711)
Intercompany			651,665	951,237
Net cash provided by (used in) financing activities			(1,150,573)	(29,838)
Net decrease in cash and cash equivalents			33,757	(172,226)
Cash and cash equivalents at beginning of period			359,087	377,070
Cash and cash equivalents at end of period	392,844	204,844	392,844	204,844
Reportable Legal Entities | Guarantor Subsidiaries | Rialto
Cash flows from financing activities:
Net proceeds on Rialto notes payable				0
Reportable Legal Entities | Guarantor Subsidiaries | Senior Notes
Cash flows from financing activities:
Proceeds from senior notes and debt issuance costs				0
Debt issuance costs			0
Reportable Legal Entities | Guarantor Subsidiaries | Unsecured Revolving Credit Facility
Cash flows from financing activities:
Net borrowings under credit facilities			(454,700)
Reportable Legal Entities | Guarantor Subsidiaries | Warehouse Repurchase Facility
Cash flows from financing activities:
Net borrowings under credit facilities			(81)	(78)
Reportable Legal Entities | Non-Guarantor Subsidiaries
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	35,108	27,474	96,307	63,270
Distributions of earnings from guarantor and non-guarantor subsidiaries			0	0
Other adjustments to reconcile net earnings (including net earnings attributable to noncontrolling interests) to net cash provided by operating activities			(75,792)	263,300
Net cash provided by operating activities			20,515	326,570
Cash flows from investing activities:
Investments in and contributions to unconsolidated entities, net of distributions of capital			(6,915)	(25,622)
Proceeds from sales of real estate owned			28,697	72,952
Originations of loans receivable				57,375
Receipts of principal payments on loans receivable and other				5,937
Proceeds from sale of investment in unconsolidated entity			0
Purchases of commercial mortgage-backed securities bonds			(31,068)	(70,187)
Acquisitions, net of cash acquired			36,350	(296)
Other			(4,717)	2,863
Distributions of capital from guarantor and non-guarantor subsidiaries			0	0
Intercompany			0	0
Net cash used in investing activities			22,347	(71,728)
Cash flows from financing activities:
Redemption of senior notes			0	0
Conversions and exchanges of convertible senior notes			0
Net payments related to noncontrolling interests			(290,385)	71,323
Net payments related to noncontrolling interests			(64,619)	(51,483)
Excess tax benefits from share-based awards			0	0
Common stock:
Issuances			0	0
Repurchases			0	0
Dividends			(96,704)	(170,188)
Intercompany			383,561	249,189
Net cash provided by (used in) financing activities			(172,299)	(261,077)
Net decrease in cash and cash equivalents			(129,437)	(6,235)
Cash and cash equivalents at beginning of period			354,111	255,347
Cash and cash equivalents at end of period	224,674	249,112	224,674	249,112
Reportable Legal Entities | Non-Guarantor Subsidiaries | Rialto
Cash flows from financing activities:
Net proceeds on Rialto notes payable				44,550
Reportable Legal Entities | Non-Guarantor Subsidiaries | Senior Notes
Cash flows from financing activities:
Proceeds from senior notes and debt issuance costs				(6,786)
Debt issuance costs			(3,270)
Reportable Legal Entities | Non-Guarantor Subsidiaries | Unsecured Revolving Credit Facility
Cash flows from financing activities:
Net borrowings under credit facilities			0
Reportable Legal Entities | Non-Guarantor Subsidiaries | Warehouse Repurchase Facility
Cash flows from financing activities:
Net borrowings under credit facilities			(100,882)	(397,682)
Consolidating Adjustments
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	(549,274)	(319,305)	(1,132,114)	(681,899)
Distributions of earnings from guarantor and non-guarantor subsidiaries			(1,132,114)	(681,899)
Other adjustments to reconcile net earnings (including net earnings attributable to noncontrolling interests) to net cash provided by operating activities			1,132,114	681,899
Net cash provided by operating activities			(1,132,114)	(681,899)
Cash flows from investing activities:
Investments in and contributions to unconsolidated entities, net of distributions of capital			0	0
Proceeds from sales of real estate owned			0	0
Originations of loans receivable				0
Receipts of principal payments on loans receivable and other				0
Proceeds from sale of investment in unconsolidated entity			0
Purchases of commercial mortgage-backed securities bonds			0	0
Acquisitions, net of cash acquired			0	0
Other			0	0
Distributions of capital from guarantor and non-guarantor subsidiaries			(85,000)	(160,000)
Intercompany			1,035,226	1,200,426
Net cash used in investing activities			950,226	1,040,426
Cash flows from financing activities:
Redemption of senior notes			0	0
Conversions and exchanges of convertible senior notes			0
Net payments related to noncontrolling interests			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			1,217,114	841,899
Intercompany			(1,035,226)	(1,200,426)
Net cash provided by (used in) financing activities			181,888	(358,527)
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
Consolidating Adjustments | Senior Notes
Cash flows from financing activities:
Proceeds from senior notes and debt issuance costs				0
Debt issuance costs			0
Consolidating Adjustments | Unsecured Revolving Credit Facility
Cash flows from financing activities:
Net borrowings under credit facilities			0
Consolidating Adjustments | Warehouse Repurchase Facility
Cash flows from financing activities:
Net borrowings under credit facilities			$ 0	$ 0