Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($)	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 583,500,000	$ 606,200,000
Accumulated Amortization	(343,800,000)	(309,000,000.0)
Total	239,700,000	297,200,000
Net impairment charge	$ 9,000,000.0	$ 0
Intangible assets weighted average life	11 years	11 years
Aviation
Acquired Indefinite-lived Intangible Assets [Line Items]
Net impairment charge	$ 5,600,000
Reduction in carrying amount	(13,800,000)
Amortization of intangible assets	8,200,000
Technical Solutions
Acquired Indefinite-lived Intangible Assets [Line Items]
Net impairment charge	3,400,000
Reduction in carrying amount	(8,700,000)
Amortization of intangible assets	5,300,000
Customer contracts and relationships
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	573,100,000	$ 595,900,000
Accumulated Amortization	(333,600,000)	(298,900,000)
Total	239,600,000	297,000,000.0
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)	(9,800,000)
Total	0	100,000
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