Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Statement of Stockholders' Equity [Abstract]
Cash dividends paid on common stock (in dollars per share)	$ 0.70	$ 0.60	$ 0.50
Issuance of options (in shares)	1,185,601	1,801,136	1,096,972
Purchase of shares of common stock (in shares)	2,730,022	2,675,575	3,151,978