Income Taxes - Tax Effects of Temporary Differences that Give Rise to Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Oct. 31, 2020	Oct. 31, 2019
Deferred tax assets:
Accounts receivable, principally due to allowances for doubtful accounts	$ 2.6	$ 3.6
Inventories	5.8	3.5
Litigation settlements	0.2	0.1
Accrued liabilities, reserves and compensation accruals	76.9	55.1
Foreign deferred tax assets	90.9	52.5
Restricted stock and stock option expenses	21.4	26.1
Net operating loss carryforwards	9.6	8.3
Intangible assets	19.6	11.1
Research and experimental expenses - Section 59(e)	9.2	2.5
Tax credit carryforwards	1.5	1.3
Total gross deferred tax assets	237.7	164.1
Less: valuation allowance	(45.3)	(41.5)
Deferred tax assets	192.4	122.6
Deferred tax liabilities:
Tax deductible goodwill	(29.7)	(25.0)
Plant and equipment	(39.2)	(14.3)
Deferred tax on foreign earnings	(7.5)	(5.9)
Transaction costs	(0.7)	(0.7)
Foreign deferred tax liabilities	(61.0)	(27.6)
Total gross deferred tax liabilities	(138.1)	(73.5)
Net deferred tax assets	$ 54.3	$ 49.1