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Supplemental Disclosure of Noncash Activities (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Apr. 30, 2013
Jul. 31, 2012
Oct. 31, 2013
Oct. 31, 2012
Oct. 31, 2011
Supplemental Disclosure of Noncash Activities (Details) [Line Items]          
Real Estate Owned, Transfer from Real Estate Owned $ 9.5        
Noncash Or Part Noncash Receivable Transferred From Joint Venture Parnters To Investment In Joint Venture   5.0 0.6 5.0  
Noncash or Part Noncash Acquisition, Inventory Acquired   34.3   34.3 9.5
Noncash or Part Noncash Acquisition Nonrecourse Land Mortgages Assumed   20.6   20.6  
Noncash or Part Noncash Acquisition Accounts Payable and Other Liabilities Assumed   15.8   15.8  
Noncash or Part Noncash Acquisition, Debt Assumed         18.5
Noncash or Part Noncash Acquisition, Other Liabilities Assumed         $ (9.0)
Common Class A [Member]
          
Supplemental Disclosure of Noncash Activities (Details) [Line Items]          
Stock Issued During Period, Shares, Conversion of Convertible Securities (in Shares)     3,396,102    
Senior Exchangeable Notes [Member] | Senior Exchangeable Notes Due 2017 [Member]
          
Supplemental Disclosure of Noncash Activities (Details) [Line Items]          
Senior exchangeable notes exchanged for Class A Common Stock (in Shares)     18,305