Income Taxes - Income Tax Provision (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Current:
Federal	$ 21.0	$ 1.4	$ 9.2
State	1.3	1.1	1.6
Foreign	26.7	26.5	15.8
Total current income tax expense (benefit)	49.0	29.0	26.6
Deferred:
Federal	(8.8)	3.2	(8.1)
State	(0.5)	0.8	(0.9)
Foreign	(2,492.9)	(4.9)	(6.9)
Total deferred income tax expense (benefit)	(2,502.2)	(0.9)	(15.9)
Provision for income taxes	$ (2,453.2)	$ 28.1	$ 10.7