Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Income tax (expense) benefit. minimum pension liability	$ 16.5	$ (4.7)	$ 0.5
Other comprehensive income (loss), derivatives qualifying as hedges, tax	$ 3.1	$ 0.0	$ (0.1)
Class A Common Stock
Dividend paid (usd per share)	$ 1.68	$ 1.68	$ 1.68
Class B Common Stock
Dividend paid (usd per share)	$ 2.51	$ 2.51	$ 2.51