Business Acquisition (Details)			12 Months Ended
	Oct. 29, 2017 USD ($) metropolitan_area state $ / shares shares	Feb. 10, 2017 USD ($)	Nov. 30, 2017 USD ($)	Nov. 30, 2016 USD ($)	Nov. 30, 2015 USD ($)
CalAtlantic Group, Inc.
Business Acquisition [Line Items]
Number of metropolitan areas where acquired business is located | metropolitan_area	43
Number of states where acquired business is located | state	19
Anticipated consideration transferred, cash (in USD per share) | $ / shares	$ 48.26
Anticipated consideration transferred, shares (in shares) | shares	24,083,091
Anticipated consideration transferred, cash	$ 1,162,250,000
Business Combination, Acquisition Of Less Than 100 Percent, Noncontrolling Interest, Ownership Percentage	26.00%
WCI Communities, Inc.
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross		$ 642,600,000
Assets:
Cash and cash equivalents, restricted cash and receivables, net		42,079,000
Inventories		613,495,000
Intangible assets		59,283,000
Goodwill		156,566,000
Deferred tax assets, net		88,147,000
Other assets		66,173,000
Total assets		1,025,743,000
Liabilities:
Accounts payable		26,735,000
Senior notes and other debts payable		282,793,000
Other liabilities		73,593,000
Total liabilities		383,121,000
Total purchase price		642,622,000
Revenues			$ 494,700,000
Pre-tax earnings			51,700,000
Transaction-related expenses			28,100,000
Homebuilding East | WCI Communities, Inc.
Assets:
Goodwill		$ 136,600,000
Lennar Financial Services
Assets:
Goodwill			59,838,000	$ 39,838,000	$ 38,854,000
Lennar Financial Services | WCI Communities, Inc.
Assets:
Goodwill			$ 20,000,000
Noncompete Agreements | WCI Communities, Inc.
Liabilities:
Amortization period		6 months
Trade Names | WCI Communities, Inc.
Liabilities:
Amortization period		20 years
Class A Common Stock | CalAtlantic Group, Inc.
Business Acquisition [Line Items]
Shares issuable per share of acquired business (in shares) | shares	0.885
Class B Common Stock | CalAtlantic Group, Inc.
Business Acquisition [Line Items]
Shares issuable per share of acquired business (in shares) | shares	0.0177