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Stock Repurchase Program - Stock Repurchase Activities (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
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Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
Stock Repurchase Program |  |  |  |
Purchases of treasury stock (in shares) | 1,585 | 2,732 | 4,688 | [1]
Average purchase price (in USD per share) | $ 152.76 | $ 120.49 | $ 89.59 | [1]
Aggregate purchase price | $ 242,078 | $ 329,185 | $ 420,000 | [1]
Reissuance of treasury stock | 3,872 | 3,798 | 3,508 |
[1] | The first quarter of fiscal 2018 includes the settlement of the $20.0 million equity forward contract related to the September 2017 ASR.

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