Supplemental Financial Information (Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2018	Feb. 28, 2017
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	$ 136,817	$ 29,674
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 (used in) operating activities	(279,545)	49,650
Net cash (used in) provided by operating activities	(142,728)	79,324
Cash flows from investing activities:
Investments in and contributions to unconsolidated entities, net of distributions of capital	(41,648)	(111,745)
Proceeds from sales of real estate owned	18,080	24,215
Originations of loans receivable	0	9,330
Proceeds from sale of investment in unconsolidated entity	(175,179)	0
Purchases of commercial mortgage-backed securities bonds	(31,068)	(40,357)
Acquisitions, net of cash acquired	(1,101,739)	(596,172)
Other	(47,014)	(32,693)
Distributions of capital from guarantor and non-guarantor subsidiaries		0
Intercompany	0	0
Net cash used in investing activities	(1,028,210)	(766,082)
Cash flows from financing activities:
Debt issuance costs	(12,039)	(10,848)
Net proceeds (payments) on other borrowings	(84,219)	(8,847)
Net payments related to noncontrolling interests	(19,908)	(25,718)
Excess tax benefits from share-based awards	0	1,953
Common stock:
Issuances	0	99
Repurchases	(25,355)	(83)
Dividends	(9,617)	(9,400)
Intercompany	0	0
Net cash (used in) provided by financing activities	(450,349)	286,289
Net decrease in cash and cash equivalents	(1,621,287)	(400,469)
Cash and cash equivalents at beginning of period	2,650,872	1,329,529
Cash and cash equivalents at end of period	1,029,585	929,060
Rialto
Cash flows from financing activities:
Net proceeds on Rialto notes payable		32,489
Principal payments on Rialto notes payable including structured notes	(100,161)	(2,971)
Common stock:
Cash and cash equivalents at beginning of period	241,861
Cash and cash equivalents at end of period	113,582
Senior Notes
Cash flows from financing activities:
Proceeds from senior notes and debt issuance costs		589,152
Debt issuance costs	(12,039)
Unsecured Revolving Credit Facility
Cash flows from financing activities:
Net borrowings under revolving lines of credit	45,300	250,000
Warehouse Repurchase Facility
Cash flows from financing activities:
Net borrowings under revolving lines of credit	(344,511)	(543,356)
Reportable Legal Entities | Lennar Corporation
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	136,215	38,080
Distributions of earnings from guarantor and non-guarantor subsidiaries	168,638	77,066
Other adjustments to reconcile net earnings (including net earnings attributable to noncontrolling interests) to net cash provided by (used in) operating activities	(274,370)	(41,356)
Net cash (used in) provided by operating activities	30,483	73,790
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
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)	(596,172)
Other	(9,045)	(2,824)
Distributions of capital from guarantor and non-guarantor subsidiaries		30,000
Intercompany	(921,113)	(634,418)
Net cash used in investing activities	(2,092,500)	(1,203,414)
Cash flows from financing activities:
Net proceeds (payments) on other borrowings	0
Net payments related to noncontrolling interests	0	0
Excess tax benefits from share-based awards		1,953
Common stock:
Issuances		99
Repurchases	(25,355)	(83)
Dividends	(9,617)	(9,400)
Intercompany	0	0
Net cash (used in) provided by financing activities	455,911	837,729
Net decrease in cash and cash equivalents	(1,606,106)	(291,895)
Cash and cash equivalents at beginning of period	1,937,674	697,112
Cash and cash equivalents at end of period	331,568	405,217
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		595,160
Debt issuance costs	(9,117)
Reportable Legal Entities | Lennar Corporation | Unsecured Revolving Credit Facility
Cash flows from financing activities:
Net borrowings under revolving lines of credit	500,000	250,000
Reportable Legal Entities | Lennar Corporation | Warehouse Repurchase Facility
Cash flows from financing activities:
Net borrowings under revolving lines of credit	0	0
Reportable Legal Entities | Guarantor Subsidiaries
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	167,049	56,832
Distributions of earnings from guarantor and non-guarantor subsidiaries	10,200	6,893
Other adjustments to reconcile net earnings (including net earnings attributable to noncontrolling interests) to net cash provided by (used in) operating activities	(352,627)	(421,010)
Net cash (used in) provided by operating activities	(175,378)	(357,285)
Cash flows from investing activities:
Investments in and contributions to unconsolidated entities, net of distributions of capital	(9,659)	(111,072)
Proceeds from sales of real estate owned	0	0
Originations of loans receivable		0
Proceeds from sale of investment in unconsolidated entity	(175,179)
Purchases of commercial mortgage-backed securities bonds	0	0
Acquisitions, net of cash acquired	24,088	0
Other	(25,220)	(9,303)
Distributions of capital from guarantor and non-guarantor subsidiaries		30,000
Intercompany	0	0
Net cash used in investing activities	164,388	(90,375)
Cash flows from financing activities:
Net proceeds (payments) on other borrowings	(14,806)	(15,217)
Net payments related to noncontrolling interests
Excess tax benefits from share-based awards		0
Common stock:
Issuances		0
Repurchases	0	0
Dividends	(167,049)	(86,832)
Intercompany	729,979	440,388
Net cash (used in) provided by financing activities	93,397	338,314
Net decrease in cash and cash equivalents	82,407	(109,346)
Cash and cash equivalents at beginning of period	359,087	377,070
Cash and cash equivalents at end of period	441,494	267,724
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 revolving lines of credit	(454,700)	0
Reportable Legal Entities | Guarantor Subsidiaries | Warehouse Repurchase Facility
Cash flows from financing activities:
Net borrowings under revolving lines of credit	(27)	(25)
Reportable Legal Entities | Non-Guarantor Subsidiaries
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	12,391	18,721
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 (used in) operating activities	168,614	428,057
Net cash (used in) provided by operating activities	181,005	446,778
Cash flows from investing activities:
Investments in and contributions to unconsolidated entities, net of distributions of capital	(31,989)	(673)
Proceeds from sales of real estate owned	18,080	24,215
Originations of loans receivable		9,330
Proceeds from sale of investment in unconsolidated entity	0
Purchases of commercial mortgage-backed securities bonds	(31,068)	(40,357)
Acquisitions, net of cash acquired	36,515	0
Other	(12,749)	(20,566)
Distributions of capital from guarantor and non-guarantor subsidiaries		0
Intercompany	0	0
Net cash used in investing activities	(21,211)	(46,711)
Cash flows from financing activities:
Net proceeds (payments) on other borrowings	(69,413)	6,370
Net payments related to noncontrolling interests	(19,908)	(25,718)
Excess tax benefits from share-based awards		0
Common stock:
Issuances		0
Repurchases	0	0
Dividends	(11,789)	(57,127)
Intercompany	191,134	194,030
Net cash (used in) provided by financing activities	(257,382)	(399,295)
Net decrease in cash and cash equivalents	(97,588)	772
Cash and cash equivalents at beginning of period	354,111	255,347
Cash and cash equivalents at end of period	256,523	256,119
Reportable Legal Entities | Non-Guarantor Subsidiaries | Rialto
Cash flows from financing activities:
Net proceeds on Rialto notes payable		32,489
Reportable Legal Entities | Non-Guarantor Subsidiaries | Senior Notes
Cash flows from financing activities:
Proceeds from senior notes and debt issuance costs		(6,008)
Debt issuance costs	(2,922)
Reportable Legal Entities | Non-Guarantor Subsidiaries | Unsecured Revolving Credit Facility
Cash flows from financing activities:
Net borrowings under revolving lines of credit	0	0
Reportable Legal Entities | Non-Guarantor Subsidiaries | Warehouse Repurchase Facility
Cash flows from financing activities:
Net borrowings under revolving lines of credit	(344,484)	(543,331)
Consolidating Adjustments
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	(178,838)	(83,959)
Distributions of earnings from guarantor and non-guarantor subsidiaries	(178,838)	(83,959)
Other adjustments to reconcile net earnings (including net earnings attributable to noncontrolling interests) to net cash provided by (used in) operating activities	178,838	83,959
Net cash (used in) provided by operating activities	(178,838)	(83,959)
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
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		(60,000)
Intercompany	921,113	634,418
Net cash used in investing activities	921,113	574,418
Cash flows from financing activities:
Net proceeds (payments) on other borrowings	0	0
Net payments related to noncontrolling interests	0	0
Excess tax benefits from share-based awards		0
Common stock:
Issuances		0
Repurchases	0	0
Dividends	178,838	143,959
Intercompany	(921,113)	(634,418)
Net cash (used in) provided by financing activities	(742,275)	(490,459)
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
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 revolving lines of credit	0	0
Consolidating Adjustments | Warehouse Repurchase Facility
Cash flows from financing activities:
Net borrowings under revolving lines of credit	$ 0	$ 0