Stockholders' Equity (Details Textual) - $ / shares		2 Months Ended	3 Months Ended			12 Months Ended
	Dec. 13, 2017	Dec. 21, 2017	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015	May 23, 2016	Dec. 16, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Shares Authorized			400,000,000			400,000,000
Common Stock, Par or Stated Value Per Share			$ 0.01			$ 0.01
Preferred Stock, Shares Authorized			15,000,000			15,000,000
Preferred Stock, Par or Stated Value Per Share			$ 0.01			$ 0.01
Common Stock, Shares, Outstanding			157,200,000			157,200,000
Common Stock Reserved for Outstanding Stock Options and Restricted Stock Units			7,900,000			7,900,000
Preferred Stock, Shares Issued			0			0	0
Common Stock, Dividends, Per Share, Declared			$ 0.08	$ 0.08	$ 0.08
Authorization to repurchase shares									20,000,000	20,000,000
Treasury Stock, Shares, Acquired						7,694,000	13,652,000	1,665,000
Percentage of Ownership of Company's Common Stock for Restricts Certain Transfers						4.95%
Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.08
Treasury Stock, Shares, Acquired		4,200,000
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance			5,800,000			5,800,000
Dec 2017 Repurchase Program [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorization to repurchase shares	20,000,000
Treasury Stock, Shares, Acquired		1,100,000