Income Taxes - Reconciliation between the Expected Provision for Income taxes at the US Federal Statutory Rate and the Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020
Income Tax Disclosure [Abstract]
Provision for income taxes at United States statutory tax rate	$ 99.8	$ 103.2	$ 56.0
Foreign earnings in jurisdictions with lower tax rates	(22.3)	(43.6)	(54.7)
Foreign earnings subject to United States tax	20.7	25.4	32.0
Excess tax benefits from share-based compensation	(2.6)	(13.0)	(6.2)
Deferred tax asset step-up	(3.4)	3.2	(9.0)
United States provision-to-return	0.5	(1.2)	7.0
Intra-group transfer to UK subsidiary	0.0	(1,987.8)	0.0
Remeasurement of deferred tax assets from UK rate change	0.0	(536.7)	0.0
Change in unrecognized tax benefits	(12.7)	(7.6)	(0.1)
State tax provision	5.0	0.8	1.9
Other, net	4.5	4.1	1.2
Provision for income taxes	$ 89.5	$ (2,453.2)	$ 28.1