Revenues - Contract with Customer, Asset and Liability (Details) - USD ($)	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Revenue from Contract with Customer [Abstract]
Billed trade receivables	$ 1,057,600,000	$ 835,800,000
Unbilled trade receivables	112,100,000	53,900,000
Costs incurred in excess of amounts billed	52,500,000	52,200,000
Capitalized commissions	27,800,000	$ 25,200,000
Capitalized contract price	16,300,000
Capitalized contract cost, amortization	13,700,000
Capitalized contract cost, impairment loss	0
Contract with Customer, Liabilities [Roll Forward]
Contract liabilities, balance at beginning of period	36,400,000
Additional contract liabilities	248,900,000
Recognition of deferred revenue	(226,800,000)
Contract liabilities, balance at end of period	$ 58,500,000