Operating and Reporting Segments - Unrealized Gain (Loss) on Investments (Details) - Lennar Other - Operating Segments - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2025	Aug. 31, 2024
Segment Reporting Information [Line Items]
Lennar Other realized and unrealized gains from technology investments	$ 99,223	$ 39,123	$ 7,280	$ 12,472
Cash Proceeds From Investments			44,700
Realized Investment Gains (Losses)	25,900
Blend Labs
Segment Reporting Information [Line Items]
Lennar Other realized and unrealized gains from technology investments	0	2,270	(3,737)	5,921
Hippo
Segment Reporting Information [Line Items]
Lennar Other realized and unrealized gains from technology investments	27,754	6,609	(598)	33,795
Opendoor
Segment Reporting Information [Line Items]
Lennar Other realized and unrealized gains from technology investments	71,345	(564)	39,638	(16,156)
SmartRent
Segment Reporting Information [Line Items]
Lennar Other realized and unrealized gains from technology investments	0	(5,634)	(4,483)	(12,206)
Sonder
Segment Reporting Information [Line Items]
Lennar Other realized and unrealized gains from technology investments	0	71	(19)	82
Sunnova
Segment Reporting Information [Line Items]
Lennar Other realized and unrealized gains from technology investments	$ 124	$ 36,371	$ (23,521)	$ 1,036