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, 2018 $ / shares shares
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Number of Shares, Outstanding, Beginning balance | shares	101
Number of Shares, Dividend equivalents | shares	1
Number of Shares, Outstanding, Ending balance | shares	102
Weighted-Average Grant Date Fair Value, Beginning balance | $ / shares	$ 46.74
Weighted-Average Grant Date Fair Value, Dividend equivalents | $ / shares	141.77
Weighted-Average Grant Date Fair Value, Ending balance | $ / shares	$ 47.14