Stock Repurchase Program and Cash Dividend (Details) - $ / shares shares in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Stock Repurchase Program [Abstract]
Number of shares purchased	3,979	3,653	4,767	9,874
Average price per share	$ 35.74	$ 37.24	$ 35.13	$ 43.30
Remaining authorization at July 31:	15,805	13,223	15,805	13,223