Stock Based Benefit Plans (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2011 Year
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number Outstanding	12,968
Weighted Average Remaining Contractual Life , Options Outstanding	4.3
Weighted Average Exercise Price, Options Outstanding	$ 20.94
Number of options, Options exercisable, at October 31	10,365
Weighted Average Remaining Contractual Life Options Exercisable	3.4
Weighted Average Exercise Price, Options Exercisable	$ 21.24
Price range one [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price, Lower Range	$ 10.35
Range of Exercise Price, Upper Range	$ 10.88
Number Outstanding	2,484
Weighted Average Remaining Contractual Life , Options Outstanding	0.8
Weighted Average Exercise Price, Options Outstanding	$ 10.66
Number of options, Options exercisable, at October 31	2,484
Weighted Average Remaining Contractual Life Options Exercisable	0.8
Weighted Average Exercise Price, Options Exercisable	$ 10.66
Price range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price, Lower Range	$ 18.38
Range of Exercise Price, Upper Range	$ 20.21
Number Outstanding	5,249
Weighted Average Remaining Contractual Life , Options Outstanding	5.1
Weighted Average Exercise Price, Options Outstanding	$ 19.36
Number of options, Options exercisable, at October 31	3,489
Weighted Average Remaining Contractual Life Options Exercisable	3.3
Weighted Average Exercise Price, Options Exercisable	$ 19.57
Price range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price, Lower Range	$ 20.76
Range of Exercise Price, Upper Range	$ 22.18
Number Outstanding	2,376
Weighted Average Remaining Contractual Life , Options Outstanding	6.5
Weighted Average Exercise Price, Options Outstanding	$ 21.13
Number of options, Options exercisable, at October 31	1,648
Weighted Average Remaining Contractual Life Options Exercisable	2.3
Weighted Average Exercise Price, Options Exercisable	$ 21.06
Price range Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price, Lower Range	$ 31.82
Range of Exercise Price, Upper Range	$ 35.97
Number Outstanding	2,759
Weighted Average Remaining Contractual Life , Options Outstanding	4.0
Weighted Average Exercise Price, Options Outstanding	$ 33.04
Number of options, Options exercisable, at October 31	2,744
Weighted Average Remaining Contractual Life Options Exercisable	4.0
Weighted Average Exercise Price, Options Exercisable	$ 33.05