Lennar Financial Services Segment (Schedule of Credit Facilities) (Details) - Lennar Financial Services - Warehouse Repurchase Facility	9 Months Ended
	Aug. 31, 2018 USD ($)
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 1,700,000,000
364-day warehouse repurchase facility that matures September 2018
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 300,000,000
Facility, term	364 days
364-day warehouse repurchase facility that matures December 2018
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 400,000,000
Facility, term	364 days
Uncommitted amount	$ 250,000,000
364-day warehouse repurchase facility that matures March 2019
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 300,000,000
Facility, term	364 days
Uncommitted amount	$ 300,000,000
364-day warehouse repurchase facility that matures June 2019
Line of Credit Facility [Line Items]
Maximum Aggregate Commitment	$ 700,000,000
Facility, term	364 days