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Acquisitions and Assets Held for Sale - Total Purchase Consideration for Business and Asset Acquisitions (Details) - USD ($) $ in Millions | Jul. 31, 2021 | Oct. 31, 2020
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Schedule Of Business Acquisitions And Asset Acquisition, By Acquisition [Line Items] |  |
Goodwill | $ 2,585.2 | $ 2,447.3
Series Of Individually Immaterial Business Acquisitions And Asset Acquisitions |  |
Schedule Of Business Acquisitions And Asset Acquisition, By Acquisition [Line Items] |  |
Total identifiable intangible assets | 208.0 | 20.4
Goodwill | 93.0 | 15.3
Net tangible liabilities | (12.3) | (0.3)
Fair value of contingent consideration | (39.1) | 0.0
Total closing purchase price | 249.6 | 35.4
Series Of Individually Immaterial Business Acquisitions And Asset Acquisitions | Technology |  |
Schedule Of Business Acquisitions And Asset Acquisition, By Acquisition [Line Items] |  |
Total identifiable intangible assets | 178.6 | 0.0
Series Of Individually Immaterial Business Acquisitions And Asset Acquisitions | In-Process Research & Development (IPR&D) |  |
Schedule Of Business Acquisitions And Asset Acquisition, By Acquisition [Line Items] |  |
Total identifiable intangible assets | 20.0 | 0.0
Series Of Individually Immaterial Business Acquisitions And Asset Acquisitions | Customer relationships |  |
Schedule Of Business Acquisitions And Asset Acquisition, By Acquisition [Line Items] |  |
Total identifiable intangible assets | 7.5 | 11.4
Series Of Individually Immaterial Business Acquisitions And Asset Acquisitions | Trademarks |  |
Schedule Of Business Acquisitions And Asset Acquisition, By Acquisition [Line Items] |  |
Total identifiable intangible assets | 1.3 | 5.1
Series Of Individually Immaterial Business Acquisitions And Asset Acquisitions | Other |  |
Schedule Of Business Acquisitions And Asset Acquisition, By Acquisition [Line Items] |  |
Total identifiable intangible assets | $ 0.6 | $ 3.9

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