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Note 11 (Detail) (USD $)
 3 Months Ended 1 Months Ended 3 Months Ended
Jan. 31, 2012
Jan. 31, 2013
Oct. 31, 2012
Jul. 31, 2005
Series A Preferred Stock [Member]
Jan. 31, 2013
Series A Preferred Stock [Member]
Jan. 31, 2013
Initial [Member]
Jan. 31, 2013
Additional [Member]
Jan. 31, 2013
Cash [Member]
The 9.125% 2020 Notes [Member]
Jan. 31, 2013
Cash [Member]
Guarantees [Member]
Jan. 31, 2013
Letters of Credit Collateral [Member]
Oct. 31, 2012
Letters of Credit Collateral [Member]
Jan. 31, 2013
Real Estate [Member]
Senior Notes [Member]
Jan. 31, 2013
Notes Collateral [Member]
Jan. 31, 2013
The 7.25% 2020 Notes [Member]
Jan. 31, 2013
The 9.125% 2020 Notes [Member]
Jan. 31, 2013
The 2.0% 2021 Notes [Member]
Jan. 31, 2013
The 5.0% 2021 Notes [Member]
Jan. 31, 2013
The 6.5% 2014 Notes [Member]
Jan. 31, 2013
The 6.375% 2014 Notes [Member]
Jan. 31, 2013
The 6.25% 2015 Notes [Member]
Jan. 31, 2013
The 6.25% 2016 Notes [Member]
Jan. 31, 2012
The 6.25% 2016 Notes [Member]
Jan. 31, 2013
The 7.5% 2016 Notes [Member]
Jan. 31, 2012
The 7.5% 2016 Notes [Member]
Jan. 31, 2013
The 8.625% 2017 Notes [Member]
Jan. 31, 2013
The 11.875% 2015 Notes [Member]
Jan. 31, 2013
The 11.0% 2017 Amortizing Note [Member]
Jan. 31, 2013
The 6.00% Exchangable Note Units [Member]
Oct. 02, 2012
The 6.00% Exchangable Note Units [Member]
Jan. 31, 2013
Senior Exchangeable Notes Due 2017 [Member]
Jan. 31, 2013
Tangible Equity Units [Member]
Jan. 31, 2013
The 9.125% 2020 Notes [Member]
Jan. 31, 2013
Senior Notes [Member]
Oct. 31, 2012
Senior Notes [Member]
Debt Instrument, Face Amount (in Dollars)           $ 992,000,000 $ 460,600,000             $ 577,000,000 $ 220,000,000 $ 53,200,000 $ 141,800,000 $ 36,700,000 $ 3,000,000 $ 21,400,000 $ 131,200,000   $ 86,500,000   $ 121,000,000 $ 60,800,000     $ 100,000,000 $ 63,900,000        
Secured Debt   977,700,000                                                                
Debt Instrument, Interest Rate, Stated Percentage                           7.25% 9.125% 2.00% 5.00% 6.50% 6.375% 6.25% 6.25%   7.50%   8.625% 11.875% 11.00% 6.00% 6.00%   6.00%      
Senior Notes, Unsecured   458,900,000                                                 23,100,000     63,900,000     458,869,000 458,736,000 [1]
Subordinated Debt (in Dollars)   5,150,000 6,091,000 [1]                                                       5,200,000      
Debt Collateral                       39,900,000                                       575,200,000    
Cash Collateral for Borrowed Securities               219,100,000 41,400,000 28,800,000 30,700,000                                              
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures   53,400,000 61,100,000                   45,200,000                                          
Fixed Charge Coverage Ratio, Numerator   2.0                                                                
Fixed Charge Coverage Ratio, Denominator   1.0                                                                
Preferred Stock, Dividend Rate, Percentage       7.625% 7.625%                                                          
Debt Instrument, Repurchased Face Amount                                           5,700,000   38,300,000                    
Debt Instrument, Repurchase Amount 19,000,000                                                                  
Gains (Losses) on Extinguishment of Debt $ 24,698,000                                                                  
[1] Derived from the audited balance sheet as of October 31, 2012.