GOODWILL AND OTHER INTANGIBLE ASSETS - Summary of Carrying Amount of Net Other Intangible Assets by Class (Details) - USD ($) $ in Millions	Apr. 30, 2020	Oct. 31, 2019
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 947.4	$ 954.9
Accumulated Amortization	207.2	178.4
Net Intangible Assets	740.2	776.5
Net Intangible Assets	740.2	776.5
Customer relationships
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible Assets	884.1	890.6
Accumulated Amortization	174.9	150.3
Net Intangible Assets	709.2	740.3
Trademarks, patents and trade names
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible Assets	26.7	27.0
Accumulated Amortization	12.0	9.3
Net Intangible Assets	14.7	17.7
Non-compete agreements
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible Assets	2.2	2.3
Accumulated Amortization	1.5	0.7
Net Intangible Assets	0.7	1.6
Other
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible Assets	21.4	21.9
Accumulated Amortization	18.8	18.1
Net Intangible Assets	2.6	3.8
Trademarks, patents and trade names
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Trademarks and patents	13.0	13.1
Accumulated Amortization	$ 0.0	$ 0.0