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Financial Instruments and Fair Value Disclosure (Schedule Of Gains And Losses Of Financial Instruments) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Nov. 30, 2023 | Nov. 30, 2022 | Nov. 30, 2021
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Changes in fair value included in other comprehensive income | $ 2,471 | $ 1,464 | $ (536)
Lennar Other |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Lennar Other unrealized gains (losses) from technology investments | (50,162) | (655,094) |
Fair Value, Measurements, Recurring | Loans held-for-sale | Financial Services |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Lennar Other unrealized gains (losses) from technology investments | (26,658) | (33,287) | (14,449)
Fair Value, Measurements, Recurring | Mortgage loan commitments | Financial Services |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Lennar Other unrealized gains (losses) from technology investments | 1,016 | 43,695 | (8,302)
Fair Value, Measurements, Recurring | Forward contracts | Financial Services |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Lennar Other unrealized gains (losses) from technology investments | (28,431) | (48,790) | 11,513
Fair Value, Measurements, Recurring | Forward options | Financial Services |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Lennar Other unrealized gains (losses) from technology investments | (522) | (142) | 0
Fair Value, Measurements, Recurring | Equity Securities | Lennar Other |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Lennar Other unrealized gains (losses) from technology investments | (50,162) | (655,094) | 510,802
Fair Value, Measurements, Recurring | Lennar Other investments available-for-sale | Lennar Other |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |
Changes in fair value included in other comprehensive income | $ 2,471 | $ 1,464 | $ (536)

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