Multifamily (Narrative) (Details) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2018 asset	May 31, 2019 USD ($) apartment	May 31, 2018 USD ($)	May 31, 2019 USD ($) apartment asset	May 31, 2018 USD ($)	Mar. 31, 2019 USD ($) apartment	Nov. 30, 2018 USD ($)
Segment Reporting Information [Line Items]
Distributions of capital from unconsolidated entities				$ 140,888	$ 196,073
Multifamily
Segment Reporting Information [Line Items]
Non-recourse debt with completion guarantees		$ 1,000,000		1,000,000			$ 1,000,000
Investments in unconsolidated entities		510,223		510,223			481,129
Gain on disposition of assets			$ 17,400	15,500	21,500
Multifamily | Variable Interest Entity, Not Primary Beneficiary | Equity Commitments
Segment Reporting Information [Line Items]
Obligations related to VIEs							237,000
Multifamily | Lennar Multifamily Venture
Segment Reporting Information [Line Items]
Total equity commitments		2,200,000		2,200,000
Equity commitments		504,000		504,000
Equity commitments called during period				121,800
Equity commitment contributions during period				30,200
Distributions of capital from unconsolidated entities				9,500
Equity Commitments Called		1,900,000		1,900,000
Funds contributed by the company		471,100		471,100
Investments in unconsolidated entities		395,400		395,400			383,400
Multifamily | Lennar Multifamily Venture | Variable Interest Entity, Not Primary Beneficiary | Equity Commitments
Segment Reporting Information [Line Items]
Obligations related to VIEs		32,900		32,900
Multifamily | Lennar Multifamily Venture II LP
Segment Reporting Information [Line Items]
Total equity commitments		1,300,000		1,300,000
Equity commitments		381,000		381,000
Change in total equity commitments		471,000
Change in equity commitments				126,000
Equity commitments called during period				138,300
Equity commitment contributions during period				23,500
Equity commitment contributions during period, inventory and ash				64,500
Remaining equity commitment		276,300		276,300
Distributions of capital from unconsolidated entities				40,900
Equity Commitments Called		349,400		349,400
Investments in unconsolidated entities		$ 85,000		$ 85,000			63,000
Number of assets transferred | asset	8			10
Number of apartments | apartment		3,800		3,800		3,000
Projected project costs		$ 1,600,000		$ 1,600,000		$ 1,300,000
Multifamily | Financial Letters of Credit
Segment Reporting Information [Line Items]
Letters of credit outstanding		1,200		1,200			$ 4,600
Management Fee | Multifamily | Unconsolidated Entities
Segment Reporting Information [Line Items]
Revenue		13,300	12,400	26,400	23,900
General Contractor Services | Multifamily
Segment Reporting Information [Line Items]
Revenue		99,200	97,000	181,600	178,800
Cost of revenue		$ 95,200	$ 93,600	$ 174,600	$ 172,200