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Acquisitions Purchase Price allocation (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Oct. 31, 2017 | Oct. 31, 2016 | Oct. 31, 2015
Business Acquisition [Line Items] |  |  |
Goodwill | $ 2,354,800 | $ 2,164,700 | $ 2,197,100
Acquisitions [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 121,900 | 94,000 | 24,200
Goodwill | 123,100 | 164,700 | 16,900
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | (4,800) | (900) | 6,600
Business Combination, Consideration Transferred | 240,200 | 257,800 | 47,700
Acquisitions [Member] | Technology [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 71,700 | 32,900 | 0
Acquisitions [Member] | Customer Relationships [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 43,100 | 47,300 | 21,000
Acquisitions [Member] | Trademarks [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 7,100 | 13,700 | 3,200
Acquisitions [Member] | Non-compete agreement [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | $ 0 | $ 100 | $ 0

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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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