Lennar Multifamily (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2018 USD ($) apartment	Aug. 31, 2017 USD ($)	Aug. 31, 2018 USD ($) apartment asset	Aug. 31, 2017 USD ($)	Nov. 30, 2017 USD ($)
Segment Reporting Information [Line Items]
Distributions of capital from unconsolidated entities			$ 227,754	$ 123,209
Lennar Multifamily
Segment Reporting Information [Line Items]
Non-recourse debt with completion guarantees	$ 1,100,000		1,100,000		$ 896,700
Investments in unconsolidated entities	482,241		482,241		407,544
Lennar Multifamily | Variable Interest Entity, Not Primary Beneficiary | Equity Commitments
Segment Reporting Information [Line Items]
Obligations related to VIEs	279,500		279,500		153,300
Lennar 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			316,100
Equity commitment contributions during period			73,400
Distributions of capital from unconsolidated entities			11,800
Equity Commitments Called	1,800,000		1,800,000
Funds contributed by the company	424,100		424,100
Investments in unconsolidated entities	378,200		378,200		323,800
Lennar Multifamily | Lennar Multifamily Venture | Variable Interest Entity, Not Primary Beneficiary | Equity Commitments
Segment Reporting Information [Line Items]
Obligations related to VIEs	79,900		79,900
Lennar Multifamily | Lennar Multifamily Venture II LP
Segment Reporting Information [Line Items]
Total equity commitments	655,000		655,000
Equity commitments	255,000		255,000
Equity commitments called during period			146,100
Equity commitment contributions during period			55,400
Equity commitments called during period, inventory contributions			108,300
Remaining equity commitment	199,600		199,600
Distributions of capital from unconsolidated entities			52,900
Investments in unconsolidated entities	$ 45,600		$ 45,600
Number of assets transferred | asset			6
Number of apartments | apartment	2,200		2,200
Projected project costs	$ 900,000		$ 900,000
Lennar Multifamily | Financial Letters of Credit
Segment Reporting Information [Line Items]
Letters of credit outstanding	4,600		4,600		$ 4,700
Management Fee | Lennar Multifamily | Unconsolidated Entities
Segment Reporting Information [Line Items]
Revenue	12,200	$ 13,100	36,100	41,200
General Contractor Services | Lennar Multifamily
Segment Reporting Information [Line Items]
Revenue	83,800	90,300	262,600	250,700
Cost of revenue	$ 80,500	$ 86,700	$ 252,700	$ 243,700