Variable Interest Entities (Estimated Maximum Exposure To Loss) (Details) - USD ($) $ in Thousands	Aug. 31, 2019	Nov. 30, 2018
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments in Unconsolidated VIEs	$ 839,813	$ 787,499
Lennar’s Maximum Exposure to Loss	1,116,395	1,096,600
Homebuilding \| Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments in Unconsolidated VIEs	84,772	123,064
Lennar’s Maximum Exposure to Loss	84,973	184,945
Obligations related to VIEs		54,800
Multifamily \| Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments in Unconsolidated VIEs	520,786	463,534
Lennar’s Maximum Exposure to Loss	797,167	710,754
Multifamily \| Variable Interest Entity, Not Primary Beneficiary \| Equity Commitments
Variable Interest Entity [Line Items]
Obligations related to VIEs		237,000
Multifamily \| Variable Interest Entity, Not Primary Beneficiary \| Financial Standby Letters of Credit
Variable Interest Entity [Line Items]
Obligations related to VIEs		4,600
Financial Services
Variable Interest Entity [Line Items]
Investments held-to-maturity	193,268	189,472
Financial Services \| Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments in Unconsolidated VIEs	166,672	136,982
Lennar’s Maximum Exposure to Loss	166,672	136,982
Investments held-to-maturity	166,700	137,000
Lennar Other
Variable Interest Entity [Line Items]
Investments held-to-maturity	60,803	59,974
Lennar Other \| Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments in Unconsolidated VIEs	67,583	63,919
Lennar’s Maximum Exposure to Loss	67,583	63,919
Investments held-to-maturity	60,800	$ 60,000
Operating Segments \| Multifamily \| Variable Interest Entity, Not Primary Beneficiary \| Equity Commitments
Variable Interest Entity [Line Items]
Obligations related to VIEs	268,600
Operating Segments \| Multifamily \| Variable Interest Entity, Not Primary Beneficiary \| Financial Standby Letters of Credit
Variable Interest Entity [Line Items]
Obligations related to VIEs	$ 1,200

Amount of investment in debt security measured at amortized cost (held-to-maturity).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26610-111562

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=108788376&loc=d3e5728-111685

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The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=108788376&loc=d3e5747-111685

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph b
-URI http://asc.fasb.org/extlink&oid=108788376&loc=d3e5728-111685

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Net carrying amount of the assets and liabilities in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), when the reporting entity is not the VIE's primary beneficiary.

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