Other Comprehensive Income Items - After-Tax Changes (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
After-tax changes in accumulated other comprehensive income (loss)
Balance	$ 3,749.8	$ 3,805.1	$ 3,431.1
Current period activity	(20.7)	(68.5)	(30.2)
Balance	3,585.7	3,749.8	3,805.1
Cumulative Translation Adjustment
After-tax changes in accumulated other comprehensive income (loss)
Balance	(60.4)	6.0	39.5
Current period activity	(23.7)	(66.4)	(33.5)
Balance	(84.1)	(60.4)	6.0
Unrealized Gain (Loss) on Derivatives
After-tax changes in accumulated other comprehensive income (loss)
Balance	(2.7)	(0.6)	(3.9)
Current period activity	3.0	(2.1)	3.3
Balance	$ 0.3	$ (2.7)	$ (0.6)