Share-Based Compensation Expense (Details Textual) (USD $) In Millions, except Per Share data, unless otherwise specified	9 Months Ended				0 Months Ended			9 Months Ended
	Jul. 31, 2014 Stock Options	Jul. 31, 2013 Stock Options	Jul. 31, 2014 Restricted Stock Units (RSUs)	Jul. 31, 2013 Restricted Stock Units (RSUs)	Apr. 10, 2014 2008 Plan	Jul. 31, 2014 2008 Plan	Apr. 10, 2014 2008 Plan	Jul. 31, 2014 2008 Plan Employee Stock Options and Stock Appreciation Rights	Jul. 31, 2014 2003 Employee Stock Purchase Plan Employee Stock period	Jul. 31, 2014 Minimum Restricted Stock Units (RSUs)	Jul. 31, 2014 Maximum Restricted Stock Units (RSUs)	Jul. 31, 2014 Maximum 2003 Employee Stock Purchase Plan Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum expiration period of incentive awards								10 years
Minimum exercise price, percentage of fair market value on grant date								100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized					6.6
Shares authorized for issuance under plan (in shares)							25.1					8.2
Remaining authorized shares available for issuance (in shares)						9.4			6.8
Vesting period of service-based awards	4 years									3 years	4 years
Intrinsic value of option exercised	$ 1.0	$ 1.0
Total fair value of restricted stock units vested and converted into common stock			40.4	25.3
Weighted average fair value of each restricted stock unit granted (per share)			$ 21.96	$ 15.89
Offer period for ESPP									12 months
Number of purchase periods in offer period									2
Length of purchase period									6 months
ESPP discount percentage purchase date									85.00%
Maximum number of shares increase under ESPP (in shares)									0.6
Shares issued under ESPP (in shares)									0.9
Unrecognized share-based compensation			$ 64.5
Weighted-average period for recognition of share-based compensation (in years)			1 year 5 months 24 days