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Stock Plans (Narrative) (Details)
12 Months Ended
Oct. 31, 2015
USD ($)
director
$ / shares
shares
Oct. 31, 2014
USD ($)
director
shares
Oct. 31, 2013
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Cash received from exercises under all share-based payment arrangements $ (4,800,000) $ 8,600,000 $ 19,300,000
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected requisite service period for options granted to employees (in months) 60 months    
Total intrinsic value of options exercised $ 45,700,000    
Total unrecognized compensation cost expected to be recognized $ 5,000,000    
Total unrecognized compensation cost expected to be recognized over a remaining weighted-average vesting period (in years) 2 years 329 days    
Performance Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance cycle 3 years    
Percentage of performance units granted 50.00%    
Total unrecognized compensation cost expected to be recognized $ 8,400,000    
Total unrecognized compensation cost expected to be recognized over a remaining weighted-average vesting period (in years) 1 year 255 days    
2006 Directors Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of non-employee directors in committee | director   2  
Number of shares authorized to be granted | shares   950,000  
Shares remaining for future grant | shares 185,775    
Award expiration date (in years) 10 years    
2006 Directors Plan [Member] | Non Employee Directors [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Right to purchase shares of common stock awarded, per share amount | $ / shares $ 0.10    
2006 Directors Plan [Member] | Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award expiration date (in years) 10 years    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year    
2007 LTIP [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of non-employee directors in committee | director 2    
Number of shares authorized to be granted | shares 5,230,000    
Shares remaining for future grant | shares 757,747    
Percentage fair market value of equity awards on grant date 100.00%    
Award expiration date (in years) 10 years    
2007 LTIP [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost expected to be recognized $ 48,800,000    
Total unrecognized compensation cost expected to be recognized over a remaining weighted-average vesting period (in years) 3 years 146 days    
November 15 [Member] | 2006 Directors Plan [Member] | Non Employee Directors [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Deferred Compensation Arrangement With Individual Amounts Authorized For Issuance $ 135,000    
November 15 [Member] | 2006 Directors Plan [Member] | Non Executive Chairman [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Deferred Compensation Arrangement With Individual Amounts Authorized For Issuance 148,500    
November 1 [Member] | 2006 Directors Plan [Member] | Non Employee Directors [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Deferred Compensation Arrangement With Individual Amounts Authorized For Issuance 135,000    
November 1 [Member] | 2006 Directors Plan [Member] | Non Executive Chairman [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Deferred Compensation Arrangement With Individual Amounts Authorized For Issuance $ 148,500    
Minimum [Member] | Performance Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of performance units granted 0.00%    
Minimum [Member] | 2007 LTIP [Member] | Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years    
Minimum [Member] | 2007 LTIP [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years    
Maximum [Member] | Performance Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of performance units granted 150.00%    
Maximum [Member] | 2007 LTIP [Member] | Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award expiration date (in years) 10 years    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years    
Maximum [Member] | 2007 LTIP [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years