Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2013	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014	Dec. 16, 2014	Nov. 07, 2013	Sep. 05, 2012
Share Repurchase Program
Number of shares purchased		13,652,000	1,665,000	2,947,000
Average price per share		$ 28.77	$ 34.17	$ 30.80
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased		15,838,000	18,535,000	5,321,000
Stockholders' Equity (Textual) [Abstract]
Common Stock, Shares Authorized		400,000,000
Common Stock, Par or Stated Value Per Share		$ 0.01
Preferred Stock, Shares Authorized		15,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.01
Common Stock, Shares, Outstanding		161,800,000
Common Stock Reserved for Outstanding Stock Options and Restricted Stock Units		10,200,000
Additional common share if convertible debt exchanged		5,900,000
Debt Instrument, Interest Rate, Stated Percentage							0.50%
Preferred Stock, Shares Issued		0	0
Stock Issued During Period, Shares, New Issues	7,200,000
Sale of Stock, Price Per Share						$ 32.00
Proceeds from Issuance of Common Stock				$ 220,365
Authorization to repurchase shares					20,000,000
Rights Issued Pursuant to Rights Plan Description		The rights issued pursuant to the 2007 Rights Plan will become exercisable upon the earlier of (i) 10 days following a public announcement that a person or group of affiliated or associated persons has acquired, or obtained the right to acquire, beneficial ownership of 15% or more of the outstanding shares of our common stock, or (ii) 10 business days following the commencement of a tender offer or exchange offer that would result in a person or group beneficially owning 15% or more of the outstanding shares of common stock. No rights were exercisable at October 31, 2016.
Percentage of Ownership of Company's Common Stock for Restricts Certain Transfers		4.95%
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance		6,800,000
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance		501,000