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Stock-Based Compensation - Summarized Activity Related to Stock Options (Detail) - Stock Options [Member]
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Oct. 31, 2019
USD ($)
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of Options, Outstanding, Beginning balance | shares 1,885
Number of Options, Granted | shares 348
Number of Options, Exercised | shares (416)
Number of Options, Forfeited or expired | shares (30)
Number of Options, Outstanding, Ending balance | shares 1,787
Number of Options, Expected to vest | shares 873
Number of Options, Exercisable | shares 902
Weighted-Average Exercise Price Per Share, Outstanding, Beginning balance | $ / shares $ 85.33
Weighted-Average Exercise Price Per Share, Granted | $ / shares 124.89
Weighted-Average Exercise Price Per Share, Exercised | $ / shares 62.51
Weighted-Average Exercise Price Per Share, Forfeited or expired | $ / shares 121.60
Weighted-Average Exercise Price Per Share, Outstanding, Ending balance | $ / shares 97.74
Weighted-Average Exercise Price Per Share, Expected to vest | $ / shares 115.26
Weighted-Average Exercise Price Per Share, Exercisable | $ / shares $ 80.42
Aggregate Intrinsic Value, Outstanding | $ $ 105,567
Aggregate Intrinsic Value, Expected to vest | $ 36,255
Aggregate Intrinsic Value, Exercisable | $ $ 68,915
Weighted Average Remaining Term, Outstanding 6 years 7 months 6 days
Weighted Average Remaining Term, Expected to vest 8 years
Weighted Average Remaining Term, Exercisable 5 years 3 months 18 days