Document And Entity Information - shares	9 Months Ended
	Aug. 31, 2017	Sep. 30, 2017
Class of Stock [Line Items]
Entity Registrant Name	LENNAR CORP /NEW/
Entity Central Index Key	0000920760
Current Fiscal Year End Date	--11-30
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Aug. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Amendment Flag	false
Class A Common Stock
Class of Stock [Line Items]
Entity Common Stock, Shares Outstanding		203,957,071
Class B Common Stock
Class of Stock [Line Items]
Entity Common Stock, Shares Outstanding		31,303,195