Common Stock Repurchases (Details) shares in Millions	3 Months Ended
	Jan. 31, 2020 shares
Equity, Class of Treasury Stock [Line Items]
Amount of non-voting common stock shares authorized by the Company's Board of Directors to be repurchased under the current share repurchase plan	8.0
Date on which the current Non-Voting Common Stock share repurchase program was announced	Jul. 10, 2019
Non-Voting Common Stock Current Repurchase Authorization [Member]
Equity, Class of Treasury Stock [Line Items]
Non-voting common stock shares repurchased and retired under the Company's current share repurchase plan during the period	1.4
Non-voting shares remaining to be repurchased and retired under the Company's current share repurchase plan as of the end of the period	4.9