Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Derivative gain (loss), tax	$ 4.0	$ 8.6	$ 3.3
Defined benefit plan, tax	$ (4.8)	$ 1.1	$ (4.1)
Adoption of ASU 2016-16		gef:Accountingstandardsupdate201616_1
Class A common stock
Dividend paid (usd per share)	$ 1.76	$ 1.76
Common Stock, Dividends, Per Share, Declared (in USD per share)			$ 1.70
Class B common stock
Dividend paid (usd per share)	$ 2.63	$ 2.63	$ 2.54