CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, dividends per share declared (in dollars per share)	$ 0.25	$ 0.245	$ 0.50	$ 0.49
Class A Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, dividends per share declared (in dollars per share)	0.28	0.275	0.56	0.55
Common Stock [Member] | Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, dividends per share declared (in dollars per share)	0.25	0.245	0.50	0.49
Common Stock [Member] | Class A Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, dividends per share declared (in dollars per share)	$ 0.28	$ 0.275	$ 0.56	$ 0.55