Financial Instruments and Fair Value Disclosures - (Schedule Of Gains And Losses Of Financial Instruments) (Details) (Details) - USD ($) $ in Thousands	3 Months Ended
Feb. 28, 2018	Feb. 28, 2017
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Changes in fair value included in other comprehensive income (loss), net of tax	$ (658)	$ 972
Fair Value, Measurements, Recurring
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Changes in fair value included in other comprehensive income (loss), net of tax	(658)	972
Fair Value, Measurements, Recurring \| Lennar Financial Services \| RMF loans held-for-sale
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Changes in fair value included in revenue	(16,297)	13,300
Fair Value, Measurements, Recurring \| Lennar Financial Services \| Mortgage loan commitments
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Changes in fair value included in revenue	1,781	6,220
Fair Value, Measurements, Recurring \| Lennar Financial Services \| Forward contracts
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Changes in fair value included in revenue	3,163	(28,214)
Fair Value, Measurements, Recurring \| Rialto \| Assets \| Credit default swaps
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Changes in fair value included in revenue	$ 89	$ (431)

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580

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- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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