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Homebuilding Senior Notes and Other Debts Payable (Letter of Credit Facilities) (Details) - USD ($) $ in Thousands | Aug. 31, 2021 | Nov. 30, 2020
--- | --- | ---
Performance letters of credit |  |
Line of Credit Facility [Line Items] |  |
Letters of credit | $ 874,820 | $ 752,096
Surety bonds |  |
Line of Credit Facility [Line Items] |  |
Letters of credit | 3,465,134 | 3,087,711
Anticipated future costs primarily for site improvements related to performance surety bonds |  |
Line of Credit Facility [Line Items] |  |
Letters of credit | $ 1,595,800 | $ 1,584,642

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition 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. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_CreditFacilityAxis=len_PerformanceLettersOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_SuretyBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_CreditFacilityAxis=len_AnticipatedFutureCostsRelatedtoSiteImprovementsRelatedtoPerformanceSuretyBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |