GOODWILL AND OTHER INTANGIBLE ASSETS - Summary of Carrying Amount of Net Other Intangible Assets by Class (Details) - USD ($) $ in Millions	Jul. 31, 2020	Oct. 31, 2019
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 951.5	$ 954.9
Accumulated Amortization	225.3	178.4
Net Intangible Assets	726.2	776.5
Net Intangible Assets	726.2	776.5
Customer relationships
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible Assets	887.4	890.6
Accumulated Amortization	191.2	150.3
Net Intangible Assets	696.2	740.3
Trademarks, patents and trade names
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible Assets	27.2	27.0
Accumulated Amortization	13.5	9.3
Net Intangible Assets	13.7	17.7
Non-compete agreements
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible Assets	2.3	2.3
Accumulated Amortization	1.9	0.7
Net Intangible Assets	0.4	1.6
Other
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible Assets	21.1	21.9
Accumulated Amortization	18.7	18.1
Net Intangible Assets	2.4	3.8
Trademarks, patents and trade names
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Trademarks and patents	13.5	13.1
Accumulated Amortization	$ 0.0	$ 0.0