Revenue - Contract with Customer, Asset and Liability (Details) - USD ($)	6 Months Ended
	Apr. 30, 2019	Nov. 01, 2018
Revenue from Contract with Customer [Abstract]
Billed trade receivables	$ 988,600,000	$ 918,900,000
Unbilled trade receivables	79,800,000	74,300,000
Costs incurred in excess of amounts billed	53,800,000	40,100,000
Capitalized commissions	19,600,000	$ 15,100,000
Capitalized contract price	7,900,000
Capitalized contract cost, amortization	3,400,000
Capitalized contract cost, impairment loss	0
Contract with Customer, Liabilities [Roll Forward]
Contract liabilities, balance at beginning of period	41,700,000
Additional contract liabilities	204,500,000
Recognition of deferred revenue	(195,700,000)
Contract liabilities, balance at end of period	$ 50,500,000