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Acquisitions and Divestitures - Acquisitions (Detail) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2015 USD ($) Acquisition | Oct. 31, 2014 USD ($) Acquisition Company | Oct. 31, 2013 USD ($) Acquisition
Business Acquisition [Line Items] |  |  |
Number of acquisitions | 0 | 2 | 0
Purchase Price, net of Cash | $ 1.6 | $ 53.5 |
Goodwill | $ 807.1 | $ 880.2 | $ 998.4
Total 2014 Acquisitions [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Number of acquisitions | Acquisition |  | 2 |
Purchase Price, net of Cash |  | $ 53.5 |
Tangible Assets, net |  | 2.5 |
Intangible Assets |  | 22.1 |
Goodwill |  | $ 25.9 |

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