Lennar Multifamily (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016	Nov. 30, 2016
Segment Reporting Information [Line Items]
Distributions of capital from unconsolidated entities			$ 96,499,000	$ 103,009,000
Lennar Multifamily
Segment Reporting Information [Line Items]
Non-recourse debt with completion guarantees	$ 744,200,000		744,200,000		$ 589,400,000
General Contractor Revenue	84,600,000	$ 53,500,000	160,400,000	84,900,000
General Contractor Costs	83,300,000	51,700,000	157,000,000.0	82,300,000
Investments in unconsolidated entities	377,265,000		377,265,000		318,559,000
Lennar Multifamily | Variable Interest Entity, Not Primary Beneficiary | Equity Commitments
Segment Reporting Information [Line Items]
Obligations related to VIEs	212,100,000		212,100,000		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			334,500,000
Equity commitment contributions during period			76,000,000.0
Distributions of capital from unconsolidated entities			0
Equity Commitments Called	1,300,000,000		1,300,000,000
Funds contributed by the company	291,900,000		291,900,000
Investments in unconsolidated entities	268,100,000		268,100,000		198,200,000
Lennar Multifamily | Unconsolidated Entities
Segment Reporting Information [Line Items]
Fee Income	15,200,000	$ 9,300,000	28,100,000	$ 17,400,000
Lennar Multifamily | Financial Letters of Credit
Segment Reporting Information [Line Items]
Letters of credit outstanding	$ 15,200,000		$ 15,200,000		$ 32,000,000.0