Stock-Based Compensation - Summarized Activity Related to Director Deferred Compensation Shares (Detail) - Directors - Deferred Compensation Share Equivalent Units shares in Thousands	12 Months Ended
	Oct. 31, 2020 $ / shares shares
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of Shares, Outstanding, Beginning balance (in shares) | shares	114
Number of Shares, Restricted share units vested (in shares) | shares	5
Number of Shares, Dividend equivalents (in shares) | shares	1
Number of Shares, Outstanding, Ending balance (in shares) | shares	120
Weighted-Average Grant Date Fair Value Per Share, Beginning balance (in dollars per share) | $ / shares	$ 55.52
Weighted-Average Grant Date Fair Value Per Share, Restricted share units vested (in dollars per share) | $ / shares	161.09
Weighted-Average Grant Date Fair Value Per Share, Dividend equivalents (in dollars per share) | $ / shares	169.43
Weighted-Average Grant Date Fair Value Per Share, Ending balance (in dollars per share) | $ / shares	$ 60.81