Lennar Homebuilding Senior Notes And Other Debts Payable (Schedule of Senior and Convertible Senior Notes) (Details) - USD ($)	1 Months Ended									4 Months Ended	7 Months Ended	12 Months Ended
	Nov. 30, 2017	Apr. 30, 2017	Jan. 31, 2017	Mar. 31, 2016	Nov. 30, 2015	Apr. 30, 2015	Feb. 28, 2014	Feb. 28, 2013	May 31, 2010	Feb. 28, 2015	Apr. 30, 2013	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015	Jan. 20, 2017
Debt Instrument [Line Items]
Net Proceeds												$ 2,450,000,000	$ 499,024,000	$ 1,146,647,000
Senior Notes | 4.75% senior notes due 2027
Debt Instrument [Line Items]
Interest rate	4.75%											4.75%
Senior Notes | 6.95% senior notes due 2018
Debt Instrument [Line Items]
Interest rate	6.95%											6.95%
Senior Notes | 4.125% senior notes due December 2018
Debt Instrument [Line Items]
Interest rate	4.125%											4.125%
Senior Notes | 4.500% senior notes due 2019
Debt Instrument [Line Items]
Interest rate	4.50%											4.50%
Senior Notes | 4.50% senior notes due 2019
Debt Instrument [Line Items]
Interest rate	4.50%											4.50%
Senior Notes | 2.95% senior notes due 2020
Debt Instrument [Line Items]
Interest rate	2.95%											2.95%
Senior Notes | 4.750% senior notes due 2021
Debt Instrument [Line Items]
Interest rate	4.75%											4.75%
Senior Notes | 4.750% senior notes due 2022
Debt Instrument [Line Items]
Interest rate	4.75%											4.75%
Senior Notes | 4.875% senior notes due December 2023
Debt Instrument [Line Items]
Interest rate	4.875%											4.875%
Senior Notes | 4.750% senior notes due 2025
Debt Instrument [Line Items]
Interest rate	4.75%											4.75%
Lennar Homebuilding
Debt Instrument [Line Items]
Interest rate	7.50%											7.50%
Lennar Homebuilding | 12.25% senior notes due 2017
Debt Instrument [Line Items]
Interest rate		12.25%
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 | Senior Notes | 4.75% senior notes due 2027
Debt Instrument [Line Items]
Principal Amount	$ 900,000,000											$ 900,000,000
Net Proceeds	$ 894,650,000
Price	100.00%											100.00%
Interest rate	4.75%											4.75%
Lennar Homebuilding | Senior Notes | 12.25% senior notes due 2017
Debt Instrument [Line Items]
Principal Amount		$ 400,000,000
Interest rate	12.25%											12.25%
Lennar Homebuilding | Senior Notes | 4.75% senior notes due December 2017
Debt Instrument [Line Items]
Principal Amount															$ 400,000,000
Price	100.00%											100.00%
Interest rate	4.75%											4.75%			4.75%
Lennar Homebuilding | Senior Notes | 6.95% senior notes due 2018
Debt Instrument [Line Items]
Principal Amount									$ 250,000,000
Net Proceeds									$ 243,900,000
Price									98.929%
Interest rate	6.95%											6.95%
Lennar Homebuilding | Senior Notes | 4.125% senior notes due December 2018
Debt Instrument [Line Items]
Principal Amount								$ 275,000,000
Net Proceeds								$ 271,718,000
Price								99.998%
Interest rate	4.125%											4.125%
Lennar Homebuilding | Senior Notes | 4.500% senior notes due 2019
Debt Instrument [Line Items]
Principal Amount							$ 500,000,000
Net Proceeds							495,725,000
Interest rate	4.50%											4.50%
Lennar Homebuilding | Senior Notes | 4.500% senior notes due 2019 issued at a price of 100%
Debt Instrument [Line Items]
Principal Amount							$ 400,000,000
Price							100.00%
Lennar Homebuilding | Senior Notes | 4.500% senior notes due 2019 issued at a price of 100.5%
Debt Instrument [Line Items]
Principal Amount							$ 100,000,000
Price							100.50%
Lennar Homebuilding | Senior Notes | 4.50% senior notes due 2019
Debt Instrument [Line Items]
Principal Amount										$ 600,000,000
Net Proceeds										595,801,000
Interest rate	4.50%											4.50%
Lennar Homebuilding | Senior Notes | 4.50% senior notes due 2019 issued at a price of 100%
Debt Instrument [Line Items]
Principal Amount										$ 350,000,000
Price										100.00%
Lennar Homebuilding | Senior Notes | 4.50% senior notes due 2019 issued at a price of 100.25%
Debt Instrument [Line Items]
Principal Amount										$ 250,000,000
Price										100.25%
Lennar Homebuilding | Senior Notes | 2.95% senior notes due 2020
Debt Instrument [Line Items]
Principal Amount	$ 300,000,000											$ 300,000,000
Net Proceeds	$ 298,800,000
Price	100.00%											100.00%
Interest rate	2.95%											2.95%
Lennar Homebuilding | Senior Notes | 4.750% senior notes due 2021
Debt Instrument [Line Items]
Principal Amount				$ 500,000,000
Net Proceeds				$ 495,974,000
Price				100.00%
Interest rate	4.75%											4.75%
Lennar Homebuilding | Senior Notes | 4.125% senior notes due 2022
Debt Instrument [Line Items]
Principal Amount			$ 600,000,000
Net Proceeds			$ 595,160,000
Price			100.00%
Interest rate	4.125%											4.125%
Lennar Homebuilding | Senior Notes | 4.750% senior notes due 2022
Debt Instrument [Line Items]
Principal Amount											$ 575,000,000
Net Proceeds											567,585,000
Interest rate	4.75%											4.75%
Lennar Homebuilding | Senior Notes | 4.750% senior notes due 2022 issued at a price of 100%
Debt Instrument [Line Items]
Principal Amount											$ 350,000,000
Price											100.00%
Lennar Homebuilding | Senior Notes | 4.750% senior notes due 2022 issued at a price of 98.073%
Debt Instrument [Line Items]
Principal Amount											$ 175,000,000
Price											98.073%
Lennar Homebuilding | Senior Notes | 4.750% senior notes due 2022 issued at a price of 98.250%
Debt Instrument [Line Items]
Principal Amount											$ 50,000,000
Price											98.25%
Lennar Homebuilding | Senior Notes | 4.875% senior notes due December 2023
Debt Instrument [Line Items]
Principal Amount					$ 400,000,000									$ 400,000,000
Net Proceeds					$ 393,622,000
Price					99.169%									99.169%
Interest rate	4.875%											4.875%
Lennar Homebuilding | Senior Notes | 4.500% senior notes due 2024
Debt Instrument [Line Items]
Principal Amount		650,000,000
Net Proceeds		$ 644,838,000
Price		100.00%
Interest rate	4.50%											4.50%
Lennar Homebuilding | Senior Notes | 4.750% senior notes due 2025
Debt Instrument [Line Items]
Principal Amount						$ 500,000,000
Net Proceeds						$ 495,528,000
Price						100.00%
Interest rate	4.75%											4.75%