Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Jan. 31, 2021	Oct. 31, 2019
Operating Loss Carryforwards [Line Items]
Effective tax rate	(499.10%)	10.60%
Deferred tax asset, intra-entity sale of certain intellectual property rights			$ 1,987.9
Unrecognized tax benefits	$ 353.8	$ 58.5		$ 49.7
Unrecognized tax benefits that would impact the effective tax rate	336.5	46.0		41.7
Accrued gross interest and penalties related to uncertain tax positions	6.4	$ 7.3		$ 3.9
Significant change in unrecognized tax benefits that is reasonably possible during the next twelve months	4.2
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	63.7
Federal net operating losses expiring	47.5
Federal net operating losses not subject to expiration	16.2
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	19.7
Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Research credit	$ 1.0