Investments in Unconsolidated Entities (Narrative) (Details) $ in Thousands	9 Months Ended
	Aug. 31, 2026 USD ($) project	Aug. 31, 2025 USD ($)	Nov. 30, 2025 USD ($) project	Nov. 30, 2024 project
Schedule of Equity Method Investments [Line Items]
Gain on sales of investment	$ 0	$ 35,678
Upward America Venture
Schedule of Equity Method Investments [Line Items]
Total equity commitments	1,000,000
Upward America Venture
Schedule of Equity Method Investments [Line Items]
Total equity commitments	78,100
Lennar's carrying value of investments	12,600		$ 13,800
Homebuilding
Schedule of Equity Method Investments [Line Items]
Non-recourse debt with completion guarantees	299,000		511,900
Lennar's carrying value of investments	1,470,473		1,545,370
Multifamily
Schedule of Equity Method Investments [Line Items]
Non-recourse debt with completion guarantees	410,900		$ 798,100
Multifamily \| Lennar Multifamily Fund
Schedule of Equity Method Investments [Line Items]
Lennar's carrying value of investments	$ 27,900
Multifamily \| Lennar Multifamily Fund \| Scenario, Plan
Schedule of Equity Method Investments [Line Items]
Fund ownership percentage	4.00%
Multifamily \| LMV I
Schedule of Equity Method Investments [Line Items]
Total equity commitments	$ 2,204,016
Lennar's carrying value of investments	$ 68,672
Multifamily \| LMV I \| Disposal Group, Held-for-Sale, Not Discontinued Operations
Schedule of Equity Method Investments [Line Items]
Number of Projects \| project				38
Multifamily \| LMV I \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Schedule of Equity Method Investments [Line Items]
Number of Projects \| project	1		35
Multifamily \| TPG Fund
Schedule of Equity Method Investments [Line Items]
Lennar's carrying value of investments	$ 46,100
Lennar Other \| Rialto Funds and Investment Vehicles
Schedule of Equity Method Investments [Line Items]
Lennar's carrying value of investments	131,300		$ 133,000
Lennar Other \| Strategic Technology Investments
Schedule of Equity Method Investments [Line Items]
Lennar's carrying value of investments	$ 232,100		$ 235,000