Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($)	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 606,200,000	$ 606,000,000.0
Accumulated Amortization	(309,000,000.0)	(250,400,000)
Total	297,200,000	355,700,000
Net impairment charge	$ 0		$ 0
Intangible assets weighted average life	12 years
Customer contracts and relationships
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 595,900,000	595,700,000
Accumulated Amortization	(298,900,000)	(243,600,000)
Total	297,000,000.0	352,200,000
Customer contracts and relationships | Technical Solutions
Acquired Indefinite-lived Intangible Assets [Line Items]
Net impairment charge		6,200,000
Reduction in carrying amount	10,500,000
Amortization of intangible assets	4,300,000
Trademarks and trade names
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	9,800,000	9,800,000
Accumulated Amortization	(9,800,000)	(6,400,000)
Total	100,000	3,400,000
Contract rights and other
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	500,000	500,000
Accumulated Amortization	(400,000)	(400,000)
Total	$ 100,000	$ 100,000