REVENUES - Contract with Customer, Asset and Liability (Details) - USD ($)	6 Months Ended
	Apr. 30, 2022	Oct. 31, 2021
Revenue from Contract with Customer [Abstract]
Billed trade receivables	$ 1,093,100,000	$ 1,057,600,000
Unbilled trade receivables	160,100,000	112,100,000
Costs incurred in excess of amounts billed	72,300,000	52,500,000
Capitalized commissions	29,200,000	$ 27,800,000
Capitalized contract price	8,200,000
Capitalized contract cost, amortization	(6,900,000)
Capitalized contract cost, impairment loss	0
Contract with Customer, Liabilities [Roll Forward]
Contract liabilities, balance at beginning of period	58,500,000
Additional contract liabilities	135,100,000
Recognition of deferred revenue	(121,600,000)
Contract liabilities, balance at end of period	$ 72,000,000.0