Stock-Based Compensation - Summarized Activity Related to Director Deferred Compensation Shares (Detail) - Directors [Member] - Deferred Compensation Share Equivalent Units [Member] shares in Thousands	6 Months Ended
	Apr. 30, 2019 $ / shares shares
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Number of Shares, Outstanding, Beginning balance | shares	107
Number of Shares, Dividend equivalents | shares	1
Number of Shares, Outstanding, Ending balance | shares	108
Weighted-Average Grant Date Fair Value, Beginning balance | $ / shares	$ 51.24
Weighted-Average Grant Date Fair Value, Dividend equivalents | $ / shares	125.90
Weighted-Average Grant Date Fair Value, Ending balance | $ / shares	$ 51.65