Basis of Presentation (Policy)	3 Months Ended
Basis of Presentation (Policy)	Feb. 29, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Consolidation	Basis of Consolidation The accompanying condensed consolidated financial statements include the accounts of Lennar Corporation and all subsidiaries, partnerships and other entities in which Lennar Corporation has a controlling interest and variable interest entities ("VIEs") (see Note 10 of the Notes to the Condensed Consolidated Financial Statements) in which Lennar Corporation is deemed to be the primary beneficiary (the "Company"). The Company’s investments in both unconsolidated entities in which a significant, but less than controlling, interest is held and in VIEs in which the Company is not deemed to be the primary beneficiary, are accounted for by the equity method. All intercompany transactions and balances have been eliminated in consolidation.
Basis of Accounting	The condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information, the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended November 30, 2019. In the opinion of management, all adjustments (consisting of normal recurring adjustments) necessary for the fair presentation of the accompanying condensed consolidated financial statements have been made. The Company has historically experienced, and expects to continue to experience, variability in quarterly results. The condensed consolidated statements of operations for the three months ended February 29, 2020 are not necessarily indicative of the results to be expected for the full year.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Actual results could differ from those estimates.
New Accounting Pronouncements	Recently Adopted Accounting Pronouncements In March 2016, the FASB issued ASU 2016-02, Leases ("ASU 2016-02"), which provides guidance for accounting for leases. ASU 2016-02 requires lessees to classify leases as either finance or operating leases and to record a right-of-use (“ROU”) asset and a lease liability for all leases with a term greater than 12 months regardless of the lease classification. The lease classification determined whether the lease expense was recognized based on an effective interest rate method or on a straight line basis over the term of the lease. Accounting for lessors remains largely unchanged from current GAAP. ASU 2016-02 was effective for the Company beginning December 1, 2019. The Company elected the available practical expedients on adoption. Additionally, in preparation for adoption of the standard, the Company has implemented internal controls and key system functionality to enable the preparation of financial information. The standard did not have a material impact on our condensed consolidated statements of operations and comprehensive income (loss) or our condensed consolidated statements of cash flows. As a result of the adoption, as of February 29, 2020, the Company has recorded $143.7 million of ROU assets and $150.8 million of lease liabilities on its condensed consolidated balance sheets within other assets and other liabilities of the respective segments. New Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ("ASU 2016-13"). ASU 2016-13 significantly changes the impairment model for most financial assets and certain other instruments. ASU 2016-13 will require immediate recognition of estimated credit losses expected to occur over the remaining life of many financial assets, which will generally result in earlier recognition of allowances for credit losses on loans and other financial instruments. ASU 2016-13 is effective for the Company's fiscal year beginning December 1, 2020 and subsequent interim periods. The Company is currently evaluating the impact the adoption of ASU 2016-13 will have on its condensed consolidated financial statements. Subsequent to the issuance of ASU 2016-13, the FASB issued ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments —Credit Losses and ASU 2019-05, Financial Instruments —Credit Losses (Topic 326) Targeted Transition Relief. These ASUs do not change the core principle of the guidance in ASU 2016-13. Instead these amendments are intended to clarify and improve operability of certain topics included within the credit losses standard. These ASUs will have the same effective date and transition requirements as ASU 2016-13. In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350), Simplifying the Accounting for Goodwill Impairment ("ASU 2017-04"). ASU 2017-04 removes the requirement to perform a hypothetical purchase price allocation to measure goodwill impairment. A goodwill impairment will now be the amount by which a reporting unit's carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. ASU 2017-04 will be effective for the Company’s fiscal year beginning December 1, 2020. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company is currently evaluating the impact the adoption of ASU 2017-04 will have on the Company's condensed consolidated financial statements.