Operating and Reporting Segments (Financial Information Related to Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 5,287,373	$ 5,562,890	$ 9,792,710	$ 9,430,972
Operating earnings (loss)	760,028	635,512	1,270,427	1,033,979
Corporate general and administrative expenses	83,451	76,113	170,298	155,456
Earnings (loss) before income taxes	676,577	559,399	1,100,129	878,523
Homebuilding
Segment Reporting Information [Line Items]
Revenues	4,949,484	5,195,599	9,121,600	8,819,320
Financial Services
Segment Reporting Information [Line Items]
Revenues	196,263	204,216	394,924	347,527
Multifamily
Segment Reporting Information [Line Items]
Revenues	123,117	147,412	255,734	244,806
Lennar Other
Segment Reporting Information [Line Items]
Revenues	18,509	15,663	20,452	19,319
Operating Segments | Homebuilding
Segment Reporting Information [Line Items]
Revenues	4,949,484	5,195,599	9,121,600	8,819,320
Operating earnings (loss)	631,361	581,789	1,091,759	951,384
Corporate general and administrative expenses	0	0	0	0
Earnings (loss) before income taxes	631,361	581,789	1,091,759	951,384
Operating Segments | Financial Services
Segment Reporting Information [Line Items]
Revenues	196,263	204,216	394,924	347,527
Operating earnings (loss)	147,326	56,217	194,643	75,189
Corporate general and administrative expenses	0	0	0	0
Earnings (loss) before income taxes	147,326	56,217	194,643	75,189
Operating Segments | Multifamily
Segment Reporting Information [Line Items]
Revenues	123,117	147,412	255,734	244,806
Operating earnings (loss)	(638)	(4,322)	1,147	2,475
Corporate general and administrative expenses	0	0	0	0
Earnings (loss) before income taxes	(638)	(4,322)	1,147	2,475
Operating Segments | Lennar Other
Segment Reporting Information [Line Items]
Revenues	18,509	15,663	20,452	19,319
Operating earnings (loss)	(18,021)	1,828	(17,122)	4,931
Corporate general and administrative expenses	0	0	0	0
Earnings (loss) before income taxes	(18,021)	1,828	(17,122)	4,931
Write-down of investments in unconsolidated entities	25,000		25,000
Corporate and Unallocated
Segment Reporting Information [Line Items]
Revenues	0	0		0
Operating earnings (loss)	0	0		0
Corporate general and administrative expenses	83,451	76,113	170,298	155,456
Earnings (loss) before income taxes	$ (83,451)	$ (76,113)	$ (170,298)	$ (155,456)