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Financial Instruments and Fair Value Disclosures - (Schedule Of Gains And Losses Of Financial Instruments) (Details) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Aug. 31, 2021 | Aug. 31, 2020 | Aug. 31, 2021 | Aug. 31, 2020
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 | $ 131 | $ 175 | $ (495) | $ (209)
Fair Value, Measurements, Recurring | Lennar Other |  |  |  |
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 | 131 | 175 | (495) | (209)
Fair Value, Measurements, Recurring | Lennar Other | Forward contracts |  |  |  |
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items] |  |  |  |
Lennar Other realized and unrealized gain (loss) | 493,671 | 0 | 690,791 | 0
Fair Value, Measurements, Recurring | Financial Services | Loans held-for-sale |  |  |  |
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items] |  |  |  |
Lennar Other realized and unrealized gain (loss) | 4,196 | 2,229 | (26,156) | 6
Fair Value, Measurements, Recurring | Financial Services | Mortgage loan commitments |  |  |  |
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items] |  |  |  |
Lennar Other realized and unrealized gain (loss) | 118 | (4,534) | 260 | 24,177
Fair Value, Measurements, Recurring | Financial Services | Forward contracts |  |  |  |
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items] |  |  |  |
Lennar Other realized and unrealized gain (loss) | $ 1,649 | $ (205) | $ 11,934 | $ (1,088)

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- Definition Amount, after tax and before adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580 + Details
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