Stockholders' Equity (Schedule Of Changes In Equity) (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2018		Feb. 28, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning	$ 7,986,132	[1]	$ 7,211,567
Net earnings (including net earnings attributable to noncontrolling interests)	136,817		29,674
Employee stock and directors plans	(2,557)		72
Stock issuance in connection with CalAtlantic acquisition	5,047,464
Tax benefit from employee stock plans, vesting of restricted stock and conversions of convertible senior notes			35,515
Amortization of restricted stock	17,766		12,505
Cash dividends	(9,617)		(9,400)
Receipts related to noncontrolling interests	3,852		153
Payments related to noncontrolling interests	(23,760)		(25,871)
Non-cash distributions to noncontrolling interests			588
Non-cash activity related to noncontrolling interests	18,645
Total other comprehensive loss, net of tax	(658)		972
Balance, ending	13,174,084	[1]	7,255,775
Additional Paid - in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning	3,142,013		2,805,349
Employee stock and directors plans	214		157
Stock issuance in connection with CalAtlantic acquisition	5,061,430
Tax benefit from employee stock plans, vesting of restricted stock and conversions of convertible senior notes			35,515
Amortization of restricted stock	17,766		12,505
Non-cash activity related to noncontrolling interests	0		2,267
Balance, ending	8,221,423		2,855,793
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning	(136,020)		(108,961)
Employee stock and directors plans	(2,816)		(87)
Stock issuance in connection with CalAtlantic acquisition	(22,542)
Balance, ending	(161,378)		(109,048)
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning	1,034		(309)
Total other comprehensive loss, net of tax	(658)		972
Balance, ending	376		663
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning	4,840,978		4,306,256
Net earnings (including net earnings attributable to noncontrolling interests)	136,215		38,080
Employee stock and directors plans	4
Cash dividends	(9,617)		(9,400)
Balance, ending	4,967,580		4,334,936
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning	113,815		185,525
Net earnings (including net earnings attributable to noncontrolling interests)	602		(8,406)
Receipts related to noncontrolling interests	3,852		153
Payments related to noncontrolling interests	(23,760)		(25,871)
Non-cash distributions to noncontrolling interests			(1,679)
Non-cash activity related to noncontrolling interests	18,645		0
Balance, ending	113,154		149,722
Class A Common Stock | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning	20,543		20,409
Employee stock and directors plans	41		2
Stock issuance in connection with CalAtlantic acquisition	8,408
Balance, ending	28,992		20,411
Class B Common Stock | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning	3,769		3,298
Stock issuance in connection with CalAtlantic acquisition	168
Balance, ending	$ 3,937		$ 3,298

[1] Under certain provisions of Accounting Standards Codification ("ASC") Topic 810, Consolidations, ("ASC 810") the Company is required to separately disclose on its condensed consolidated balance sheets the assets owned by consolidated variable interest entities ("VIEs") and liabilities of consolidated VIEs as to which neither Lennar Corporation, or any of its subsidiaries, has any obligations. As of February 28, 2018, total liabilities include $366.0 million related to consolidated VIEs as to which there was no recourse against the Company, of which $4.5 million is included in Lennar Homebuilding accounts payable, $11.1 million in Lennar Homebuilding senior notes and other debts payable, $347.0 million in Lennar Homebuilding liabilities related to consolidated inventory not owned, $1.5 million in Lennar Homebuilding other liabilities, $1.8 million in Rialto liabilities and $0.1 million in Lennar Multifamily liabilities. As of November 30, 2017, total liabilities include $389.7 million related to consolidated VIEs as to which there was no recourse against the Company, of which $5.0 million is included in Lennar Homebuilding accounts payable, $380.7 million in Lennar Homebuilding liabilities related to consolidated inventory not owned, $1.8 million in Lennar Homebuilding other liabilities and $2.2 million in Rialto liabilities.