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Employee Benefit Plans - Stock Options and Restricted Stock Units Under all Equity Plans (Except 2005 Director's Plan) (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2016
Oct. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]        
Weighted- Average Exercise Price per Share, Options exercised (in USD per share) $ 38.18 $ 34.56 $ 30.06  
Stock Option        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Available for grant, beginning balance (in shares) 12,583 11,244 11,883  
Available for Grant, Options granted (in shares) (1,134) (1,505) (1,685)  
Available for Grant, Options canceled/forfeited/expired (in shares) 157 129 33  
Available for Grant, Restricted stock units granted (in shares) (2,541) (2,694) (2,967)  
Available for Grant, Restricted stock units forfeited (in shares) 374 409 180  
Available for Grant, Additional shares reserved (in shares) 3,000 5,000 3,800  
Available for grants, ending balance (in shares) 12,439 12,583 11,244 11,883
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Options Outstanding, Options granted (in shares) 1,134 1,536 1,685  
Options Outstanding, Options assumed (in shares) 141 154    
Options Outstanding, Options exercised (in shares) (1,336) (1,770) (2,154)  
Options Outstanding, Options canceled/forfeited/expired (in shares) (178) (145) (65)  
Options Outstanding, Exercisable (in shares) 3,387      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]        
Weighted- Average Exercise Price per Share, Beginning balance (in USD per share) $ 46.83 $ 39.59 $ 34.94  
Weighted- Average Exercise Price per Share, Options granted (in USD per share) 89.52 68.18 47.39  
Weighted- Average Exercise Price per Share, Options assumed (in USD per share) 18.66 34.52    
Weighted- Average Exercise Price per Share, Options exercised (in USD per share) 38.18 34.56 30.06  
Weighted- Average Exercise Price per Share, Options canceled/forfeited/expired (in USD per share) 51.82 47.17 35.31  
Weighted- Average Exercise Price per Share, Ending balance (in USD per share) 55.63 $ 46.83 $ 39.59 $ 34.94
Weighted- Average Exercise Price per Share, Exercisable (in USD per share) $ 44.43      
Weighted Average Remaining Contractual Life, options outstanding 4 years 4 months 21 days 4 years 7 months 6 days 4 years 7 months 24 days 4 years 8 months 1 day
Weighted-Average Remaining Contractual Life , Exercisable 3 years 5 months 1 day      
Aggregate Intrinsic Value, Beginning balance $ 263,555 $ 126,850 $ 109,627  
Aggregate Intrinsic Value, ending Balance 214,432 $ 263,555 $ 126,850 $ 109,627
Aggregate Intrinsic Value, Exercisable $ 152,837      
Stock Option | All Stock Plans        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Options outstanding, beginning balance (in shares) 6,530 6,755 7,289  
Options outstanding, ending balance (in shares) 6,291 6,530 6,755 7,289