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Financial Instruments and Fair Value Disclosures - (Unobservable Inputs Used in Discounted Cash Flow Model to Determine the Fair Value of Communities) (Details) | Aug. 31, 2023 | Aug. 31, 2022
--- | --- | ---
Average selling price |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Unobservable inputs |  | 750,000,000
Absorption rate per quarter (homes) |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Unobservable inputs |  | 2
Discount rate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Unobservable inputs | 0.20 | 0.20
Minimum | Average selling price |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Unobservable inputs | 371,000 |
Minimum | Absorption rate per quarter (homes) |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Unobservable inputs | 3 |
Maximum | Average selling price |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Unobservable inputs | 850,000,000 |
Maximum | Absorption rate per quarter (homes) |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Unobservable inputs | 26 |

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- Definition Inventory, Measurement Input + References No definition available. + Details
Name: | len_InventoryMeasurementInput
Namespace Prefix: | len_
Data Type: | xbrli:decimalItemType
Balance Type: | na
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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
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Balance Type: |
Period Type: |