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Goodwill and Intangible Assets - Changes of Goodwill (Details)
$ in Thousands
6 Months Ended
Apr. 30, 2020
USD ($)
Goodwill [Roll Forward]  
Goodwill $ 3,171,179 [1]
Additions 136,806
Effect of foreign currency translation 3,258
Goodwill $ 3,311,243
[1]
Derived from audited financial statements.