Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Apr. 30, 2016	Oct. 31, 2015	[1]
Statement of Financial Position [Abstract]
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	2,000,000	2,000,000
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	400,000,000	400,000,000
Common Stock, shares outstanding	152,255,000	155,157,000
Treasury stock, shares	5,009,000	2,107,000

[1] Derived from audited financial statements.