Stock-Based Compensation - Summarized Activity Related to Director Deferred Compensation Shares (Detail) - Directors [Member] - Deferred Compensation Share Equivalent Units [Member] shares in Thousands	9 Months Ended
	Jul. 31, 2016 $ / shares shares
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Number of Shares, Outstanding, Beginning balance | shares	100
Number of Shares, Deferrals | shares	1
Number of Shares, Dividend equivalents | shares	1
Number of Shares, Distributions | shares	(8)
Number of Shares, Outstanding, Ending balance | shares	94
Weighted-Average Grant Date Fair Value, Beginning balance | $ / shares	$ 36.76
Weighted-Average Grant Date Fair Value, Deferrals | $ / shares	73.34
Weighted-Average Grant Date Fair Value, Dividend equivalents | $ / shares	72.30
Weighted-Average Grant Date Fair Value, Distributions | $ / shares	26.25
Weighted-Average Grant Date Fair Value, Ending balance | $ / shares	$ 38.28