Lennar Homebuilding Senior Notes And Other Debts Payable (Narrative) (Details) - USD ($) shares in Thousands		1 Months Ended				12 Months Ended
		Nov. 30, 2017	Aug. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015	May 31, 2017	Jan. 20, 2017	Jun. 30, 2016	May 31, 2016
Debt Instrument [Line Items]
Lennar Homebuilding equity in earnings (loss) from unconsolidated entities						$ 49,478,000	$ 55,205,000	$ 105,184,000
Letters of credit outstanding		$ 511,800,000				511,800,000
Proceeds from senior notes						$ 2,450,000,000	$ 499,024,000	$ 1,146,647,000
Shares included in the calculation for diluted earnings per share related to the dilutive effective of convertible senior notes (in shares)						0	12,288	25,614
Converted debt exchanged for cash						$ 0	$ 234,028,000	$ 212,107,000
Mortgages notes on land and other debt retired						$ 139,725,000	210,968,000	258,108,000
Senior Notes | 2.95% senior notes due 2020
Debt Instrument [Line Items]
Interest rate		2.95%				2.95%
Senior Notes | 4.75% senior notes due 2027
Debt Instrument [Line Items]
Interest rate		4.75%				4.75%
Lennar Homebuilding
Debt Instrument [Line Items]
Lennar Homebuilding equity in earnings (loss) from unconsolidated entities						$ (61,708,000)	(49,275,000)	$ 63,373,000
Senior notes and other debts payable	[1]	$ 6,410,003,000				$ 6,410,003,000	4,575,977,000
Interest rate		7.50%				7.50%
Minimum required guarantee of debt by subsidiaries to be a guarantor						$ 75,000,000
Weighted average interest rate		3.10%				3.10%
Lennar Homebuilding | Surety Bond
Debt Instrument [Line Items]
Outstanding surety bonds		$ 1,320,948,000				$ 1,320,948,000
Anticipated future costs to complete site improvements		$ 570,400,000				$ 570,400,000
Anticipated future costs to complete site improvements as a percent						44.00%
Lennar Homebuilding | 4.125% senior notes due 2022
Debt Instrument [Line Items]
Interest rate		4.125%				4.125%
Lennar Homebuilding | 4.500% senior notes due 2024
Debt Instrument [Line Items]
Interest rate		4.50%				4.50%
Lennar Homebuilding | 12.25% senior notes due 2017
Debt Instrument [Line Items]
Interest rate				12.25%
Lennar Homebuilding | Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowings											$ 2,000,000,000	$ 1,800,000,000
Accordion feature		$ 403,000,000				$ 403,000,000
Senior notes and other debts payable		0				0
Lennar Homebuilding | Unsecured Revolving Credit Facility | Credit Facility Due in June 2020
Debt Instrument [Line Items]
Maximum borrowings									$ 50,000,000		1,385,667,000
Lennar Homebuilding | Unsecured Revolving Credit Facility | Credit Facility Due in June 2018
Debt Instrument [Line Items]
Maximum borrowings											$ 160,000,000
Lennar Homebuilding | Letters of Credit | Letters of Credit Available for Issuance Under Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowings		500,000,000				500,000,000
Lennar Homebuilding | Letters of Credit | Letters of Credit Available for Issuance from Other Financial Institutions
Debt Instrument [Line Items]
Maximum borrowings		330,000,000				330,000,000
Lennar Homebuilding | Performance Letters Of Credit
Debt Instrument [Line Items]
Letters of credit outstanding		384,400,000				384,400,000	270,800,000
Lennar Homebuilding | Financial Letters Of Credit
Debt Instrument [Line Items]
Letters of credit outstanding		127,400,000				127,400,000	210,300,000
Lennar Homebuilding | Senior Notes
Debt Instrument [Line Items]
Debt issuance costs		33,500,000				33,500,000	22,100,000
Lennar Homebuilding | Senior Notes | 4.75% senior notes due December 2017
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 0				$ 0	398,479,000
Principal Amount										$ 400,000,000
Interest rate		4.75%				4.75%				4.75%
Price		100.00%				100.00%
Lennar Homebuilding | Senior Notes | 4.125% senior notes due 2022
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 595,904,000				$ 595,904,000	0
Principal Amount					$ 600,000,000
Interest rate		4.125%				4.125%
Price					100.00%
Proceeds from senior notes					$ 595,160,000
Lennar Homebuilding | Senior Notes | 6.875% senior notes due 2021
Debt Instrument [Line Items]
Principal Amount		$ 250,000,000				$ 250,000,000
Interest rate			6.875%	6.875%
Redemption price percentage			103.438%	103.438%
Long-term Debt, Gross				$ 250,000,000
Lennar Homebuilding | Senior Notes | 2.95% senior notes due 2020
Debt Instrument [Line Items]
Senior notes and other debts payable		298,305,000				298,305,000	0
Principal Amount		$ 300,000,000				$ 300,000,000
Interest rate		2.95%				2.95%
Price		100.00%				100.00%
Proceeds from senior notes		$ 298,800,000
Lennar Homebuilding | Senior Notes | 4.75% senior notes due 2027
Debt Instrument [Line Items]
Senior notes and other debts payable		892,657,000				$ 892,657,000	0
Principal Amount		$ 900,000,000				$ 900,000,000
Interest rate		4.75%				4.75%
Price		100.00%				100.00%
Proceeds from senior notes		$ 894,650,000
Lennar Homebuilding | Senior Notes | 2.95% senior notes due 2020 and 4.75% senior notes due 2027
Debt Instrument [Line Items]
Proceeds from senior notes		1,190,000,000
Lennar Homebuilding | Senior Notes | 4.500% senior notes due 2024
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 645,353,000				$ 645,353,000	0
Principal Amount				$ 650,000,000
Interest rate		4.50%				4.50%
Price				100.00%
Proceeds from senior notes				$ 644,838,000
Lennar Homebuilding | Senior Notes | 12.25% senior notes due 2017
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 0				$ 0	398,232,000
Principal Amount				$ 400,000,000
Interest rate		12.25%				12.25%
Percentage of principal amount redeemed				100.00%
Lennar Homebuilding | Mortgage notes on land and other debt
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 398,417,000				$ 398,417,000	206,080,000
Mortgages notes on land and other debt retired						$ 139,700,000	$ 211,000,000

[1] 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.As of November 30, 2016, total liabilities include $126.4 million related to consolidated VIEs as to which there was no recourse against the Company, of which $3.6 million is included in Lennar Homebuilding accounts payable, $110.0 million in Lennar Homebuilding liabilities related to consolidated inventory not owned, $2.5 million in Lennar Homebuilding other liabilities, $10.3 million in Rialto liabilities.