Lennar Homebuilding Senior Notes and Other Debts Payable (Schedule of Senior Notes and Other Debts Payable) (Details) - USD ($) $ in Thousands		Aug. 31, 2018	Jul. 06, 2018	May 31, 2018	Feb. 12, 2018	Nov. 30, 2017
Senior Notes | 4.125% senior notes due December 2018
Debt Instrument [Line Items]
Interest rate		4.125%
Senior Notes | 4.500% senior notes due 2019
Debt Instrument [Line Items]
Interest rate		4.50%
Senior Notes | 4.50% senior notes due 2019
Debt Instrument [Line Items]
Interest rate		4.50%
Senior Notes | 4.750% senior notes due 2021
Debt Instrument [Line Items]
Interest rate		4.75%
Senior Notes | 4.750% senior notes due 2022
Debt Instrument [Line Items]
Interest rate		4.75%
Senior Notes | 4.875% senior notes due December 2023
Debt Instrument [Line Items]
Interest rate		4.875%
Senior Notes | 4.750% senior notes due 2025
Debt Instrument [Line Items]
Interest rate		4.75%
Lennar Homebuilding
Debt Instrument [Line Items]
Senior notes and other debts payable	[1]	$ 9,407,987				$ 6,410,003
Lennar Homebuilding | 4.125% senior notes due 2022
Debt Instrument [Line Items]
Interest rate		4.125%
Lennar Homebuilding | 4.500% senior notes due 2024
Debt Instrument [Line Items]
Interest rate		4.50%
Lennar Homebuilding | Senior Notes | 4.125% senior notes due December 2018
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 274,887				274,459
Interest rate		4.125%
Lennar Homebuilding | Senior Notes | 0.25% convertible senior notes due 2019
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 1,292				0
Interest rate		0.25%
Lennar Homebuilding | Senior Notes | 4.500% senior notes due 2019
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 499,364				498,793
Interest rate		4.50%
Lennar Homebuilding | Senior Notes | 4.50% senior notes due 2019
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 598,997				598,325
Interest rate		4.50%
Lennar Homebuilding | Senior Notes | 6.625% senior notes due 2020
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 313,752				0
Interest rate		6.625%
Lennar Homebuilding | Senior Notes | 2.95% senior notes due 2020
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 298,692				298,305
Interest rate		2.95%
Lennar Homebuilding | Senior Notes | 8.375% senior notes due 2021
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 440,156				0
Interest rate		8.375%
Lennar Homebuilding | Senior Notes | 4.750% senior notes due 2021
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 497,915				497,329
Interest rate		4.75%
Lennar Homebuilding | Senior Notes | 6.25% senior notes due December 2021
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 316,541				0
Interest rate		6.25%
Lennar Homebuilding | Senior Notes | 4.125% senior notes due 2022
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 596,647				595,904
Interest rate		4.125%
Lennar Homebuilding | Senior Notes | 5.375% senior notes due 2022
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 261,769				0
Interest rate		5.375%
Lennar Homebuilding | Senior Notes | 4.750% senior notes due 2022
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 570,185				569,484
Interest rate		4.75%
Lennar Homebuilding | Senior Notes | 4.875% senior notes due December 2023
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 395,662				394,964
Interest rate		4.875%
Lennar Homebuilding | Senior Notes | 4.500% senior notes due 2024
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 645,897				645,353
Interest rate		4.50%
Lennar Homebuilding | Senior Notes | 5.875% senior notes due 2024
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 454,001				0
Interest rate		5.875%
Lennar Homebuilding | Senior Notes | 4.750% senior notes due 2025
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 497,003				496,671
Interest rate		4.75%
Lennar Homebuilding | Senior Notes | 5.25% senior notes due 2026
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 409,436				0
Interest rate		5.25%
Lennar Homebuilding | Senior Notes | 5.00% senior notes due 2027
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 353,371				0
Interest rate		5.00%
Lennar Homebuilding | Senior Notes | 4.75% senior notes due 2027
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 892,110				892,657
Interest rate		4.75%
Lennar Homebuilding | Senior Notes | 6.95% senior notes due 2018
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 0				249,342
Interest rate		6.95%	6.95%
Lennar Homebuilding | Mortgage notes on land and other debt
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 440,310				398,417
Lennar Homebuilding | Unsecured revolving credit facility
Debt Instrument [Line Items]
Senior notes and other debts payable		$ 650,000				$ 0
CalAtlantic Group, Inc. | Senior Notes
Debt Instrument [Line Items]
Interest rate				1.625%
CalAtlantic Group, Inc. | Senior Notes | 0.25% convertible senior notes due 2019
Debt Instrument [Line Items]
Interest rate				0.25%
CalAtlantic Group, Inc. | Senior Notes | 6.625% senior notes due 2020
Debt Instrument [Line Items]
Senior notes and other debts payable					$ 267,700
CalAtlantic Group, Inc. | Senior Notes | 8.375% senior notes due 2021
Debt Instrument [Line Items]
Senior notes and other debts payable					397,600
CalAtlantic Group, Inc. | Senior Notes | 6.25% senior notes due December 2021
Debt Instrument [Line Items]
Senior notes and other debts payable					292,000
CalAtlantic Group, Inc. | Senior Notes | 5.375% senior notes due 2022
Debt Instrument [Line Items]
Senior notes and other debts payable					240,800
CalAtlantic Group, Inc. | Senior Notes | 5.875% senior notes due 2024
Debt Instrument [Line Items]
Senior notes and other debts payable					421,400
CalAtlantic Group, Inc. | Senior Notes | 5.25% senior notes due 2026
Debt Instrument [Line Items]
Senior notes and other debts payable					395,500
CalAtlantic Group, Inc. | Senior Notes | 5.00% senior notes due 2027
Debt Instrument [Line Items]
Senior notes and other debts payable					$ 347,300

[1] Under certain provisions of 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 August 31, 2018, total liabilities include $345.3 million related to consolidated VIEs as to which there was no recourse against the Company, of which $6.1 million is included in Lennar Homebuilding accounts payable, $48.9 million in Lennar Homebuilding senior notes and other debts payable, $280.5 million in Lennar Homebuilding liabilities related to consolidated inventory not owned, $8.8 million in Lennar Homebuilding other liabilities and $0.9 million in Rialto 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.