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Variable Interest Entities (Exposure to Losses) (Details) - Variable Interest Entity, Not Primary Beneficiary Including Third Parties - USD ($) $ in Thousands	Aug. 31, 2021	Nov. 30, 2020
Variable Interest Entity [Line Items]
Non-refundable option deposits and pre-acquisition costs	$ 1,079,078	$ 414,154
Financial Standby Letters of Credit
Variable Interest Entity [Line Items]
Letters of credit in lieu of cash deposits under certain land and option contracts	$ 153,116	$ 87,537

X

- Definition

Represents non-refundable option deposits and pre-acquisition costs.

+ References

No definition available.

+ Details

Name:	len_VariableInterestEntitiesNonRefundableOptionDepositsAndPreAcquisitioncosts
Namespace Prefix:	len_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- 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

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=len_VariableInterestEntityNotPrimaryBeneficiaryIncludingThirdPartiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=len_FinancialStandbyLettersofCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: