Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Income tax expense, unrealized gain on derivatives	$ 8.6	$ 3.3
Income tax (expense) benefit on minimum pension liability	$ 1.1	$ (4.1)	$ (3.1)
Class A common stock
Dividend paid (usd per share)	$ 1.76	$ 1.70	$ 1.68
Class B common stock
Dividend paid (usd per share)	$ 2.63	$ 2.54	$ 2.51