Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Oct. 31, 2021	Oct. 31, 2020
Deferred tax assets:
Accounts receivable, principally due to allowances for doubtful accounts	$ 3.4	$ 2.6
Inventories	6.1	5.8
Accrued liabilities, reserves and compensation accruals	78.1	77.1
Foreign deferred tax assets	2,531.5	90.9
Share-based compensation	28.6	21.4
Net operating loss carryforwards	18.5	9.6
Intangible assets	7.5	19.6
Research and experimental expenses - Section 59(e)	13.5	9.2
Tax credit carryforwards	0.8	1.5
Total gross deferred tax assets	2,688.0	237.7
Less: valuation allowance	(51.8)	(45.3)
Deferred tax assets	2,636.2	192.4
Deferred tax liabilities:
Tax deductible goodwill	(34.0)	(29.7)
Plant and equipment	(46.5)	(39.2)
Deferred tax on foreign earnings	(8.4)	(7.5)
Transaction costs	(0.7)	(0.7)
Foreign deferred tax liabilities	(24.1)	(61.0)
Total gross deferred tax liabilities	(113.7)	(138.1)
Net deferred tax assets	$ 2,522.5	$ 54.3