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Significant Accounting Policies (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2017
Entity Information [Line Items]      
Number of Operating Segments 2    
Additional Significant Accounting Policies (Textual) [Abstract]      
Number of geographic segments 5    
Number of years to complete a community 4 years    
Number of years to complete a master planned community 10 years    
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment $ 252.5 $ 145.0  
Depreciation 67.6 21.0 $ 18.7
Advertising Expense $ 38.5 $ 28.5 $ 26.1
warranty period, structural integrity 10 years    
Construction defect claims, reported and resolved, period of time 10 years    
More Likely Than Not Definition Threshold 50.00%