Stock-Based Compensation Plans (Summary of stock option activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Stock option transactions
Options outstanding, beginning of period shares	17,599
Granted, shares	2,888
Exercised, shares	(3,390)
Forfeited/expired, shares	(25)
Options outstanding, end of period shares	17,072	17,599
Options exercisable, end of period shares	8,190
Options outstanding, weighted-average exercise price, beginning of period ($ per share)	$ 37.22
Granted, weighted-average exercise price ($ per share)	46.21
Exercised, weighted-average exercise price ($ per share)	31.78
Forfeited/expired, weighted-average exercise price ($ per share)	40.78
Options outstanding, weighted-average exercise price, end of period ($ per share)	39.81	$ 37.22
Options exercisable, weighted-average exercise price, end of period ($ per share)	$ 35.68
Options outstanding, weighted-average remaining contractual term, end of period (in years)	5 years 9 months 18 days
Options exercisable, weighted-average remaining contractual term, end of period (in years)	4 years
Options outstanding, aggregate intrinsic value, end of period	$ 341,062
Options exercisable, aggregate intrinsic value, end of period	197,436
The total intrinsic value of options exercised during the period	63,800	$ 23,400	$ 65,100
Fair value of options vested in the period	$ 22,400