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Stock-Based Compensation - Summarized Activity Related to Director Deferred Compensation Shares (Detail) - Directors - Deferred Compensation Share Equivalent Units
shares in Thousands
 6 Months Ended
Apr. 30, 2021
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]  
Outstanding, Beginning balance (in shares) | shares 120
Dividend equivalents (in shares) | shares 0
Dividend equivalents (in shares) | shares (11)
Outstanding, Ending balance (in shares) | shares 109
Share Based Compensation Arrangement By Share Based Payment Award Vested Equity Instruments Other Than Options Weighted Average Grant Date Fair Value [Roll Forward]  
Beginning balance (in dollars per share) | $ / shares $ 60.81
Dividend equivalents (in dollars per share) | $ / shares 0
Distributions (in dollars per share) | $ / shares 68.28
Ending balance (in dollars per share) | $ / shares $ 60.86