Stock-Based Compensation - Summarized Activity Related to Director Deferred Compensation Shares (Detail) - Directors [Member] - Deferred Compensation Share Equivalent Units [Member] shares in Thousands	12 Months Ended
	Oct. 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, Restricted share units vested | shares	8
Number of Shares, Dividend equivalents | shares	1
Number of Shares, Distributions | shares	(11)
Number of Shares, Outstanding, Ending balance | shares	99
Weighted-Average Grant Date Fair Value Per Share, Beginning balance | $ / shares	$ 36.76
Weighted-Average Grant Date Fair Value, Deferrals | $ / shares	78.59
Weighted-Average Grant Date Fair Value Per Share, Restricted share units vested | $ / shares	72.09
Weighted-Average Grant Date Fair Value Per Share, Dividend equivalents | $ / shares	77.95
Weighted-Average Grant Date Fair Value Per Share, Distributions | $ / shares	26.33
Weighted-Average Grant Date Fair Value Per Share, Ending balance | $ / shares	$ 41.72