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Financial Instruments and Fair Value Disclosure (Fair Value Measured On Recurring Basis) (Details) - USD ($) $ in Thousands | Nov. 30, 2021 | Nov. 30, 2020
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Residential Portfolio Segment |  |
Financial Instruments [Line Items] |  |
Aggregate principal balance of loans held-for-sale | $ 1,586,764 | $ 1,232,548
Aggregate fair value of loans held-for-sale in excess of principal balance | 49,519 | 63,969
Commercial Portfolio Segment |  |
Financial Instruments [Line Items] |  |
Aggregate principal balance of loans held-for-sale | 0 | 194,362
Aggregate fair value of loans held-for-sale in excess of principal balance | 68 | (774)
Lennar Other |  |
Financial Instruments [Line Items] |  |
Investments available-for-sale | 41,700 | 53,500
Fair Value, Measurements, Recurring | Financial Services | Level 2 | Residential Portfolio Segment |  |
Financial Instruments [Line Items] |  |
Loans held-for-sale | 1,636,283 | 1,296,517
Fair Value, Measurements, Recurring | Financial Services | Level 3 |  |
Financial Instruments [Line Items] |  |
Mortgage servicing rights | 2,492 | 2,113
Fair Value, Measurements, Recurring | Financial Services | Level 3 | Commercial Portfolio Segment |  |
Financial Instruments [Line Items] |  |
Loans held-for-sale | 68 | 193,588
Fair Value, Measurements, Recurring | Lennar Other | Level 1 |  |
Financial Instruments [Line Items] |  |
Investments in equity securities | 906,539 | 0
Fair Value, Measurements, Recurring | Lennar Other | Level 3 |  |
Financial Instruments [Line Items] |  |
Investments available-for-sale | $ 41,654 | $ 53,497

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 Reference 3: 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=121553693&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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