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Stock Repurchase Program - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Apr. 30, 2022 | Feb. 28, 2022 | Apr. 30, 2022 | Apr. 30, 2021 | Apr. 30, 2022 | Apr. 30, 2021 | Dec. 10, 2021
Accelerated Share Repurchases [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program authorized amount |  |  |  |  |  |  |  | $ 1,000,000
Remaining amount available for further repurchases | $ 500,000 |  | $ 500,000 |  |  | $ 500,000 |  |
Purchases of treasury stock (in shares) |  |  | 984 | [1] | 756 | 1,685 | 1,593 |
Aggregate purchased shares |  |  | $ 290,000 | [1] | $ 195,211 | $ 535,000 | $ 398,082 |
Accelerated Share Repurchase Program February 2022 |  |  |  |  |  |  |  |
Accelerated Share Repurchases [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program authorized amount |  | $ 200,000 |  |  |  |  |  |
Prepayment to repurchase stock |  | 200,000 |  |  |  |  |  |
Initial share delivery |  | $ 160,000 |  |  |  |  |  |
Stock repurchase program, prepayment during prior period, future derivative settlement | $ 40,000 |  |  |  |  |  |  |
Purchases of treasury stock (in shares) | 700 |  |  |  |  |  |  |
Purchases of treasury stock (in USD per share) | $ 305.36 |  |  |  |  |  |  |
Open Market Purchase |  |  |  |  |  |  |  |
Accelerated Share Repurchases [Line Items] |  |  |  |  |  |  |  |
Purchases of treasury stock (in shares) |  |  | 200 |  |  |  |  |
Purchases of treasury stock (in USD per share) |  |  | $ 298.29 |  |  |  |  |
Aggregate purchased shares |  |  | $ 50,000 |  |  |  |  |
[1] | Included the 161,215 shares and $40.0 million equity forward contract from the December 2021 ASR settled in February 2022.

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