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Stock Repurchase Program and Cash Dividend (Details Textual) - $ / shares | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 05, 2019 | Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2019 | Jul. 31, 2018 | Oct. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  | 3,979,000 | 3,653,000 | 4,767,000 | 9,874,000 |
Treasury Stock Acquired, Average Cost Per Share |  | $ 35.74 | $ 37.24 | $ 35.13 | $ 43.30 |
Dec 2017 Repurchase Program [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased |  |  |  |  |  | 20,000,000
December 2018 Repurchase Program [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased |  | 20,000,000 |  | 20,000,000 |  |
Subsequent Event [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Treasury Stock, Shares, Acquired | 1,800,000 |  |  |  |  |
Treasury Stock Acquired, Average Cost Per Share | $ 35.63 |  |  |  |  |

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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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