| Document and Entity Information | Jan. 10, 2025 |
| Document And Entity Information [Line Items] | |
| Entity Registrant Name | LENNAR CORP /NEW/ |
| Amendment Flag | false |
| Entity Central Index Key | 0000920760 |
| Document Type | 8-K |
| Document Period End Date | Jan. 10, 2025 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 1-11749 |
| Entity Tax Identification Number | 95-4337490 |
| Entity Address, Address Line One | 5505 Waterford District Drive |
| Entity Address, City or Town | Miami |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33126 |
| City Area Code | (305) |
| Local Phone Number | 559-4000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Class A Common Stock, par value $.10 |
| Trading Symbol | LEN |
| Security Exchange Name | NYSE |
| Common Class B [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Class B Common Stock, par value $.10 |
| Trading Symbol | LEN.B |
| Security Exchange Name | NYSE |
