Document And Entity Information - USD ($)	12 Months Ended
	Nov. 30, 2017	Dec. 31, 2017	May 31, 2017
Document Type	10-K
Amendment Flag	false
Document Period End Date	Nov. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Entity Registrant Name	LENNAR CORP /NEW/
Entity Central Index Key	0000920760
Current Fiscal Year End Date	--11-30
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Entity Public Float			$ 10,595,353,196
Class A Common Stock
Entity Common Stock, Shares Outstanding		203,952,285
Class B Common Stock
Entity Common Stock, Shares Outstanding		36,007,774