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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
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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

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