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Variable Interest Entities (Narrative) (Details) $ in Millions	6 Months Ended
	May 31, 2021 USD ($)
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Decrease in consolidated inventory	$ 73.4

X

- Definition

Increase (Decrease) in Land Under Purchase Options, Not Owned, Recorded

+ References

No definition available.

+ Details

Name:	len_IncreaseDecreaseInLandUnderPurchaseOptionsNotOwnedRecorded
Namespace Prefix:	len_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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_VariableInterestEntityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: