Supplemental Financial Information (Condensed Consolidating Statement Of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	$ 771,754	$ 913,091	$ 819,200
Distributions of earnings from guarantor and non-guarantor subsidiaries	0	0	0
Other adjustments to reconcile net earnings (including net loss attributable to noncontrolling interests) to net cash provided by operating activities	225,110	(405,287)	(1,238,846)
Net cash provided by operating activities	996,864	507,804	(419,646)
Cash flows from investing activities:
Proceeds from sale of operating properties	60,326	25,288	73,732
Investments in and contributions to unconsolidated entities, net of distributions of capital	(222,977)	(102,571)	(95,941)
Proceeds from sales of real estate owned	(86,565)	(97,871)	(155,295)
Receipts of principal payments on loans held-for-sale	(11,251)	0	0
Receipts of principal payments on loans receivable and other	165,413	84,433	28,389
Originations of loans receivable	(98,375)	(56,507)	(78,703)
Purchases of commercial mortgage-backed securities bonds	(107,262)	(42,436)	(13,973)
Acquisitions, net of cash acquired	(611,103)	(725)	0
Other	11,758	(91,915)	(181,165)
Distributions of capital from guarantor and non-guarantor subsidiaries	0	0	0
Intercompany	0	0	0
Net cash used in investing activities	(869,817)	(85,837)	(98,393)
Cash flows from financing activities:
Net repayments under warehouse facilities	(199,684)
Net borrowings under warehouse facilities	(199,684)	107,465	366,290
Proceeds from senior notes and debt issuance costs	2,421,410	494,284	1,134,840
Redemption of senior notes	(1,058,595)	(250,000)	(500,000)
Conversions and exchanges on convertible senior notes	0	(234,028)	(212,107)
Net proceeds on other borrowings	(108,495)	(173,805)	(156,490)
Proceeds from other liabilities	195,541	0	0
Net payments related to noncontrolling interests	(68,586)	(127,057)	(132,078)
Excess tax benefits from share-based awards	1,981	7,039	113
Common stock:
Issuances	720	19,471	9,405
Repurchases	(27,054)	(19,902)	(23,188)
Dividends	(37,608)	(35,324)	(33,192)
Intercompany	0	0	0
Net cash provided by (used in) financing activities	1,194,296	(250,883)	394,670
Net increase (decrease) in cash and cash equivalents	1,321,343	171,084	(123,369)
Cash and cash equivalents at beginning of year	1,329,529	1,158,445	1,281,814
Cash and cash equivalents at end of year	2,650,872	1,329,529	1,158,445
Rialto
Cash flows from financing activities:
Principal payments on Rialto notes payable including structured notes	(24,964)	(39,026)	(58,923)
Net proceeds on Rialto notes payable	74,666
Common stock:
Cash and cash equivalents at beginning of year	148,827
Cash and cash equivalents at end of year	241,861	148,827
Reportable Legal Entities | Lennar Corporation
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	810,480	911,844	802,894
Distributions of earnings from guarantor and non-guarantor subsidiaries	995,169	1,068,529	949,090
Other adjustments to reconcile net earnings (including net loss attributable to noncontrolling interests) to net cash provided by operating activities	(739,947)	(1,083,418)	(782,575)
Net cash provided by operating activities	1,065,702	896,955	969,409
Cash flows from investing activities:
Proceeds from sale of operating properties	0	0	0
Investments in and contributions to unconsolidated entities, net of distributions of capital	0	0	0
Proceeds from sales of real estate owned	0	0	0
Receipts of principal payments on loans held-for-sale	0
Receipts of principal payments on loans receivable and other		0	0
Originations of loans receivable	0	0	0
Purchases of commercial mortgage-backed securities bonds	0	0
Acquisitions, net of cash acquired	(611,103)
Other	(35,251)	(11,709)	(5,988)
Distributions of capital from guarantor and non-guarantor subsidiaries	115,000	40,000	115,000
Intercompany	(865,364)	(787,185)	(1,514,775)
Net cash used in investing activities	(1,396,718)	(758,894)	(1,405,763)
Cash flows from financing activities:
Net repayments under warehouse facilities	0
Net borrowings under warehouse facilities		0	0
Proceeds from senior notes and debt issuance costs	2,433,539	495,974	1,137,826
Redemption of senior notes	(800,000)	(250,000)	(500,000)
Conversions and exchanges on convertible senior notes		(234,028)	(212,107)
Net proceeds on other borrowings	0	0
Proceeds from other liabilities	0
Net payments related to noncontrolling interests	0	0	0
Excess tax benefits from share-based awards	1,981	7,039	113
Common stock:
Issuances	720	19,471	9,405
Repurchases	(27,054)	(19,902)	(23,188)
Dividends	(37,608)	(35,324)	(33,192)
Intercompany	0	0	0
Net cash provided by (used in) financing activities	1,571,578	(16,770)	378,857
Net increase (decrease) in cash and cash equivalents	1,240,562	121,291	(57,497)
Cash and cash equivalents at beginning of year	697,112	575,821	633,318
Cash and cash equivalents at end of year	1,937,674	697,112	575,821
Reportable Legal Entities | Lennar Corporation | Rialto
Cash flows from financing activities:
Principal payments on Rialto notes payable including structured notes		0	0
Net proceeds on Rialto notes payable	0
Reportable Legal Entities | Guarantor Subsidiaries
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	928,441	1,007,795	929,070
Distributions of earnings from guarantor and non-guarantor subsidiaries	72,104	63,278	51,956
Other adjustments to reconcile net earnings (including net loss attributable to noncontrolling interests) to net cash provided by operating activities	(246,983)	(231,877)	(861,284)
Net cash provided by operating activities	753,562	839,196	119,742
Cash flows from investing activities:
Proceeds from sale of operating properties	60,326	25,288	73,732
Investments in and contributions to unconsolidated entities, net of distributions of capital	(181,101)	(139,533)	(90,267)
Proceeds from sales of real estate owned	0	0	0
Receipts of principal payments on loans held-for-sale	0
Receipts of principal payments on loans receivable and other		0	0
Originations of loans receivable	0	0	0
Purchases of commercial mortgage-backed securities bonds	0	0
Acquisitions, net of cash acquired	0
Other	(49,356)	(56,627)	(96,180)
Distributions of capital from guarantor and non-guarantor subsidiaries	80,000	34,000	115,050
Intercompany	0	0	0
Net cash used in investing activities	(90,131)	(136,872)	2,335
Cash flows from financing activities:
Net repayments under warehouse facilities	(104)
Net borrowings under warehouse facilities		116	0
Proceeds from senior notes and debt issuance costs	0	0	0
Redemption of senior notes	(258,595)	0	0
Conversions and exchanges on convertible senior notes		0	0
Net proceeds on other borrowings	(104,471)	(165,463)	(156,490)
Proceeds from other liabilities	0
Net payments related to noncontrolling interests	0	0	0
Excess tax benefits from share-based awards	0	0	0
Common stock:
Issuances	0	0	0
Repurchases	0	0	0
Dividends	(1,018,441)	(1,047,795)	(1,044,070)
Intercompany	700,197	551,840	1,161,617
Net cash provided by (used in) financing activities	(681,414)	(661,302)	(38,943)
Net increase (decrease) in cash and cash equivalents	(17,983)	41,022	83,134
Cash and cash equivalents at beginning of year	377,070	336,048	252,914
Cash and cash equivalents at end of year	359,087	377,070	336,048
Reportable Legal Entities | Guarantor Subsidiaries | Rialto
Cash flows from financing activities:
Principal payments on Rialto notes payable including structured notes		0	0
Net proceeds on Rialto notes payable	0
Reportable Legal Entities | Non-Guarantor Subsidiaries
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	100,106	125,259	88,282
Distributions of earnings from guarantor and non-guarantor subsidiaries	0	0	0
Other adjustments to reconcile net earnings (including net loss attributable to noncontrolling interests) to net cash provided by operating activities	144,767	(221,799)	(596,033)
Net cash provided by operating activities	244,873	(96,540)	(507,751)
Cash flows from investing activities:
Proceeds from sale of operating properties	0	0	0
Investments in and contributions to unconsolidated entities, net of distributions of capital	(41,876)	36,962	(5,674)
Proceeds from sales of real estate owned	(86,565)	(97,871)	(155,295)
Receipts of principal payments on loans held-for-sale	(11,251)
Receipts of principal payments on loans receivable and other		84,433	28,389
Originations of loans receivable	(98,375)	(56,507)	(78,703)
Purchases of commercial mortgage-backed securities bonds	(107,262)	(42,436)
Acquisitions, net of cash acquired	0
Other	96,365	(23,579)	(78,997)
Distributions of capital from guarantor and non-guarantor subsidiaries	0	0	0
Intercompany	0	0	0
Net cash used in investing activities	(53,332)	96,744	20,310
Cash flows from financing activities:
Net repayments under warehouse facilities	(199,580)
Net borrowings under warehouse facilities		107,349	366,290
Proceeds from senior notes and debt issuance costs	(12,129)	(1,690)	(2,986)
Redemption of senior notes	0	0	0
Conversions and exchanges on convertible senior notes		0	0
Net proceeds on other borrowings	(4,024)	(8,342)
Proceeds from other liabilities	195,541
Net payments related to noncontrolling interests	(68,586)	(127,057)	(132,078)
Excess tax benefits from share-based awards	0	0	0
Common stock:
Issuances	0	0	0
Repurchases	0	0	0
Dividends	(243,832)	(158,012)	(187,026)
Intercompany	165,167	235,345	353,158
Net cash provided by (used in) financing activities	(92,777)	8,567	338,435
Net increase (decrease) in cash and cash equivalents	98,764	8,771	(149,006)
Cash and cash equivalents at beginning of year	255,347	246,576	395,582
Cash and cash equivalents at end of year	354,111	255,347	246,576
Reportable Legal Entities | Non-Guarantor Subsidiaries | Rialto
Cash flows from financing activities:
Principal payments on Rialto notes payable including structured notes		(39,026)	(58,923)
Net proceeds on Rialto notes payable	74,666
Consolidating Adjustments
Cash flows from operating activities:
Net earnings (including net earnings (loss) attributable to noncontrolling interests)	(1,067,273)	(1,131,807)	(1,001,046)
Distributions of earnings from guarantor and non-guarantor subsidiaries	(1,067,273)	(1,131,807)	(1,001,046)
Other adjustments to reconcile net earnings (including net loss attributable to noncontrolling interests) to net cash provided by operating activities	1,067,273	1,131,807	1,001,046
Net cash provided by operating activities	(1,067,273)	(1,131,807)	(1,001,046)
Cash flows from investing activities:
Proceeds from sale of operating properties	0	0	0
Investments in and contributions to unconsolidated entities, net of distributions of capital	0	0	0
Proceeds from sales of real estate owned	0	0	0
Receipts of principal payments on loans held-for-sale	0
Receipts of principal payments on loans receivable and other		0	0
Originations of loans receivable	0	0	0
Purchases of commercial mortgage-backed securities bonds	0	0
Acquisitions, net of cash acquired	0
Other	0	0	0
Distributions of capital from guarantor and non-guarantor subsidiaries	(195,000)	(74,000)	(230,050)
Intercompany	865,364	787,185	1,514,775
Net cash used in investing activities	670,364	713,185	1,284,725
Cash flows from financing activities:
Net repayments under warehouse facilities	0
Net borrowings under warehouse facilities		0	0
Proceeds from senior notes and debt issuance costs	0		0
Redemption of senior notes	0	0	0
Conversions and exchanges on convertible senior notes		0	0
Net proceeds on other borrowings	0	0	0
Proceeds from other liabilities	0
Net payments related to noncontrolling interests	0	0	0
Excess tax benefits from share-based awards	0	0	0
Common stock:
Issuances	0	0	0
Repurchases	0	0	0
Dividends	1,262,273	1,205,807	1,231,096
Intercompany	(865,364)	(787,185)	(1,514,775)
Net cash provided by (used in) financing activities	396,909	418,622	(283,679)
Net increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents at beginning of year	0	0	0
Cash and cash equivalents at end of year	0	0	0
Consolidating Adjustments | Rialto
Cash flows from financing activities:
Principal payments on Rialto notes payable including structured notes		$ 0	$ 0
Net proceeds on Rialto notes payable	$ 0