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Acquisitions Purchase Price allocation (Details) - USD ($)
$ in Thousands
12 Months Ended
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2016
Business Acquisition [Line Items]      
Goodwill $ 2,392,100 $ 2,354,800 $ 2,164,700
Acquisitions [Member]      
Business Acquisition [Line Items]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles 1,189,600 121,900 94,000
Goodwill 70,600 123,100 164,700
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net 59,600 (4,800) (900)
Business Combination, Consideration Transferred 1,319,800 240,200 257,800
Acquisitions [Member] | Technology [Member]      
Business Acquisition [Line Items]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles 0 71,700 32,900
Acquisitions [Member] | Customer Relationships [Member]      
Business Acquisition [Line Items]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles 23,500 43,100 47,300
Acquisitions [Member] | Trademarks [Member]      
Business Acquisition [Line Items]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles 100,000 7,100 13,700
Acquisitions [Member] | Composite [Member]      
Business Acquisition [Line Items]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles 1,061,900 0 0
Acquisitions [Member] | Non-compete agreement [Member]      
Business Acquisition [Line Items]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles $ 4,200 $ 0 $ 100