Business Segment Information (Schedule of Net Sales To External Customers By Country Of Domicile) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Segment Reporting Information [Line Items]
Total net sales to external customers	$ 654.3	$ 631.3	$ 1,282.4	$ 1,221.3
United States
Segment Reporting Information [Line Items]
Total net sales to external customers	305.9	293.2	584.9	554.6
Europe
Segment Reporting Information [Line Items]
Total net sales to external customers	209.5	210.4	419.2	413.8
Rest of world
Segment Reporting Information [Line Items]
Total net sales to external customers	$ 138.9	$ 127.7	$ 278.3	$ 252.9