Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Oct. 31, 2016	Oct. 31, 2015
Deferred tax assets:
Accounts receivable, principally due to allowances for doubtful accounts	$ 3.3	$ 1.3
Inventories	6.2	4.9
Litigation settlements	0.5	0.2
Accrued liabilities, reserves and compensation accruals	50.3	43.1
Share-based compensation expenses	24.5	26.4
Net operating loss carryforwards	2.7	2.8
Plant and equipment	0.4	4.4
Research and experimental expenses - Section 59(e)	6.7	2.6
Tax credit carryforwards	1.8	1.1
Total gross deferred tax assets	96.4	86.8
Less valuation allowance	(13.3)	(13.4)
Deferred tax assets	83.1	73.4
Deferred tax liabilities:
Tax deductible goodwill	(29.5)	(26.5)
Transaction costs	(1.1)	(1.1)
Foreign deferred tax liabilities	(5.6)	(6.6)
Other intangible assets	(31.2)	(24.0)
Total gross deferred tax liabilities	(67.4)	(58.2)
Net deferred tax assets	$ 15.7	$ 15.2