Acquisitions (Details) - USD ($) $ in Millions		6 Months Ended	12 Months Ended
	Nov. 01, 2017	Apr. 30, 2018	Oct. 31, 2017	Oct. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 2,461.1	$ 2,354.8	$ 2,164.7
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles		1,189.6	121.9
Goodwill		67.8	123.1
Total Purchase Price		62.4	(4.8)
Total purchase consideration		1,319.8	240.2
Paragard
Business Acquisition [Line Items]
Total Purchase Price	$ 1,105.4
Total purchase consideration	1,100.0
Property, plant and equipment	2.0
Inventory	47.3
Other assets	9.4
Total assets acquired	1,121.8
Less: liabilities assumed	16.4
Inventory step up	45.4
Technology | Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles		0.0	71.7
Customer relationships | Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles		23.5	43.1
Trademarks | Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles		100.0	7.1
Composite | Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles		1,061.9	0.0
Composite | Paragard
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	$ 1,061.9
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	15 years
Other Intangible Assets | Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles		$ 4.2	$ 0.0
Assembled Workforce | Paragard
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	$ 1.2
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years