Goodwill and Other Intangible Assets - Summary of Carrying Amount of Net Intangible Assets by Class (Details) - USD ($) $ in Millions	Oct. 31, 2019	Oct. 31, 2018
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Indefinite lived intangible assets	$ 13.1
Gross Intangible Assets	954.9	$ 207.6
Accumulated Amortization	178.4	127.0
Net Intangible Assets	776.5	80.6
Customer relationships
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible Assets	890.6	162.2
Accumulated Amortization	150.3	105.8
Net Intangible Assets	740.3	56.4
Trademarks and patents
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible Assets	27.0	10.9
Accumulated Amortization	9.3	5.1
Net Intangible Assets	17.7	5.8
Non-compete agreements
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible Assets	2.3
Accumulated Amortization	0.7
Net Intangible Assets	1.6
Other
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Intangible Assets	21.9	21.2
Accumulated Amortization	18.1	16.1
Net Intangible Assets	3.8	5.1
Trademarks and patents
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Indefinite lived intangible assets	$ 13.1	$ 13.3