Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Oct. 31, 2017	Oct. 31, 2016
Deferred tax assets:
Accounts receivable, principally due to allowances for doubtful accounts	$ 5.4	$ 3.3
Inventories	6.1	6.2
Litigation settlements	0.8	0.5
Accrued liabilities, reserves and compensation accruals	50.4	50.3
Foreign deferred tax assets (Puerto Rico tax incentives)	37.9	0.0
Restricted stock and stock option expenses	39.7	24.5
Net operating loss carryforwards	3.7	2.7
Plant and equipment	0.0	0.4
Research and experimental expenses - Section 59(e)	5.1	6.7
Tax credit carryforwards	8.7	1.8
Total gross deferred tax assets	157.8	96.4
Less valuation allowance	(59.1)	(13.3)
Deferred tax assets	98.7	83.1
Deferred tax liabilities:
Tax deductible goodwill	(32.4)	(29.5)
Plant and equipment	(4.8)	0.0
Transaction costs	(1.1)	(1.1)
Foreign deferred tax liabilities	(13.0)	(5.6)
Other intangible assets	(25.9)	(31.2)
Total gross deferred tax liabilities	(77.2)	(67.4)
Net deferred tax assets	$ 21.5	$ 15.7