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, 2017 $ / shares shares
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Number of Shares, Outstanding, Beginning balance | shares	99
Number of Shares, Restricted share units vested | shares	6
Number of Shares, Dividend equivalents | shares	1
Number of Shares, Distributions | shares	(5)
Number of Shares, Outstanding, Ending balance | shares	101
Weighted-Average Grant Date Fair Value Per Share, Beginning balance | $ / shares	$ 41.72
Weighted-Average Grant Date Fair Value Per Share, Restricted share units vested | $ / shares	97.60
Weighted-Average Grant Date Fair Value Per Share, Dividend equivalents | $ / shares	115.54
Weighted-Average Grant Date Fair Value Per Share, Distributions | $ / shares	26.89
Weighted-Average Grant Date Fair Value Per Share, Ending balance | $ / shares	$ 46.74