Lennar Multifamily (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016	Nov. 30, 2016
Segment Reporting Information [Line Items]
Distributions of capital from unconsolidated entities			$ 123,209,000	$ 209,820,000
Lennar Multifamily
Segment Reporting Information [Line Items]
Non-recourse debt with completion guarantees	$ 838,900,000		838,900,000		$ 589,400,000
General Contractor Revenue	90,300,000	$ 71,600,000	250,700,000	156,500,000
General Contractor Costs	86,700,000	69,100,000	243,700,000	151,400,000
Investments in unconsolidated entities	397,119,000		397,119,000		318,559,000
Lennar Multifamily | Variable Interest Entity, Not Primary Beneficiary | Equity Commitments
Segment Reporting Information [Line Items]
Obligations related to VIEs	182,100,000		182,100,000		288,200,000
Lennar Multifamily | Lennar Multifamily Venture
Segment Reporting Information [Line Items]
Total equity commitments	2,200,000,000		2,200,000,000
Equity commitments	504,000,000		504,000,000
Equity commitments called during period			464,400,000
Equity commitment contributions during period			106,100,000
Distributions of capital from unconsolidated entities			0
Equity Commitments Called	1,400,000,000		1,400,000,000
Funds contributed by the company	321,900,000		321,900,000
Investments in unconsolidated entities	296,900,000		296,900,000		198,200,000
Lennar Multifamily | Unconsolidated Entities
Segment Reporting Information [Line Items]
Fee Income	13,100,000	$ 10,000,000	41,200,000	$ 27,400,000
Lennar Multifamily | Financial Letters of Credit
Segment Reporting Information [Line Items]
Letters of credit outstanding	$ 13,000,000		$ 13,000,000		$ 32,000,000