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GOODWILL AND OTHER INTANGIBLE ASSETS - Summary of Carrying Amount of Net Other Intangible Assets by Class (Details) - USD ($) $ in Millions | Apr. 30, 2019 | Oct. 31, 2018
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Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Gross Intangible Assets | $ 922.9 | $ 207.6
Accumulated Amortization | 144.1 | 127.0
Net Intangible Assets | 778.8 | 80.6
Net Intangible Assets | 778.8 | 80.6
Customer relationships |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Gross Intangible Assets | 861.0 | 162.2
Accumulated Amortization | 120.6 | 105.8
Net Intangible Assets | 740.4 | 56.4
Trademarks, patents and trade names |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Gross Intangible Assets | 25.8 | 10.9
Accumulated Amortization | 6.4 | 5.1
Net Intangible Assets | 19.4 | 5.8
Trademarks, patents and trade names |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Gross Intangible Assets | 0.9 |
Accumulated Amortization | 0.1 |
Net Intangible Assets | 0.8 |
Total |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Gross Intangible Assets | 22.0 | 21.2
Accumulated Amortization | 17.0 | 16.1
Net Intangible Assets | 5.0 | 5.1
Trademarks, patents and trade names |  |
Finite Lived And Indefinite Lived Intangible Assets [Line Items] |  |
Indefinite lived intangible assets | $ 13.2 | $ 13.3

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