Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Contract with customer, liability, revenue recognized	$ 1,100.0	$ 1,000.0
Revenue, remaining performance obligation, amount	4,900.0
Revenue, remaining performance obligation, non-cancellable, amount	$ 673.8
Revenue, remaining performance obligation, excluding non-cancellable, recognized over twelve month period, percent	61.00%
Capitalized contract cost, net	$ 81.3	86.4
Amortization of capitalized costs to obtain revenue contracts	61.2	62.8
Sales Based Royalties
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Contract with customer, liability, revenue recognized	$ 102.4	$ 80.0