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Business Acquisition (Narrative) (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Feb. 10, 2017
Feb. 28, 2017
Feb. 28, 2017
Jan. 31, 2017
Lennar Homebuilding | 4.125% senior notes due 2022        
Business Acquisition [Line Items]        
Interest rate   4.125% 4.125%  
Senior Notes | Lennar Homebuilding | 4.125% senior notes due 2022        
Business Acquisition [Line Items]        
Interest rate       4.125%
WCI Communities, Inc.        
Business Acquisition [Line Items]        
Amount paid to WCI stockholders $ 642.6      
Revenue since acquisition     $ 19.5  
Pre-tax loss since acquisition     $ 8.9  
Transaction costs   $ 11.0