Stock Options Outstanding (Detail) (Stock Option, USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options Outstanding	10,219
Weighted-Average Remaining Contractual Life, Options Outstanding	3 years 8 months 16 days	2 years 11 months 19 days	2 years 9 months 18 days	2 years 10 months 21 days
Weighted-Average Exercise Price, Options Outstanding	$ 24.64
Number of Exercisable Options	6,337
Weighted-Average Exercise Price, Exercisable Options	$ 23.87
Option Exercise Price Range Point 1
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices Range, Lower Range Limit	$ 3.60
Exercise Prices Range, Upper Range Limit	$ 19.28
Number of Options Outstanding	1,289
Weighted-Average Remaining Contractual Life, Options Outstanding	2 years 10 months 21 days
Weighted-Average Exercise Price, Options Outstanding	$ 16.58
Number of Exercisable Options	1,147
Weighted-Average Exercise Price, Exercisable Options	$ 16.63
Option Exercise Price Range Point 2
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices Range, Lower Range Limit	$ 19.32
Exercise Prices Range, Upper Range Limit	$ 21.10
Number of Options Outstanding	1,055
Weighted-Average Remaining Contractual Life, Options Outstanding	2 years 7 months 28 days
Weighted-Average Exercise Price, Options Outstanding	$ 20.82
Number of Exercisable Options	790
Weighted-Average Exercise Price, Exercisable Options	$ 20.76
Option Exercise Price Range Point 3
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices Range, Lower Range Limit	$ 21.18
Exercise Prices Range, Upper Range Limit	$ 23.39
Number of Options Outstanding	1,391
Weighted-Average Remaining Contractual Life, Options Outstanding	4 years 8 months 5 days
Weighted-Average Exercise Price, Options Outstanding	$ 22.03
Number of Exercisable Options	599
Weighted-Average Exercise Price, Exercisable Options	$ 21.76
Option Exercise Price Range Point 4
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices Range, Lower Range Limit	$ 23.45
Exercise Prices Range, Upper Range Limit	$ 26.09
Number of Options Outstanding	1,219
Weighted-Average Remaining Contractual Life, Options Outstanding	2 years 2 months 1 day
Weighted-Average Exercise Price, Options Outstanding	$ 24.71
Number of Exercisable Options	1,131
Weighted-Average Exercise Price, Exercisable Options	$ 24.68
Option Exercise Price Range Point 5
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices Range, Lower Range Limit	$ 26.17
Exercise Prices Range, Upper Range Limit	$ 26.56
Number of Options Outstanding	1,232
Weighted-Average Remaining Contractual Life, Options Outstanding	3 years 6 months 11 days
Weighted-Average Exercise Price, Options Outstanding	$ 26.40
Number of Exercisable Options	792
Weighted-Average Exercise Price, Exercisable Options	$ 26.32
Option Exercise Price Range Point 6
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices Range, Lower Range Limit	$ 26.66
Exercise Prices Range, Upper Range Limit	$ 27.14
Number of Options Outstanding	1,505
Weighted-Average Remaining Contractual Life, Options Outstanding	4 years 18 days
Weighted-Average Exercise Price, Options Outstanding	$ 27.04
Number of Exercisable Options	869
Weighted-Average Exercise Price, Exercisable Options	$ 27.05
Option Exercise Price Range Point 7
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices Range, Lower Range Limit	$ 27.43
Exercise Prices Range, Upper Range Limit	$ 29.62
Number of Options Outstanding	1,033
Weighted-Average Remaining Contractual Life, Options Outstanding	5 years 2 months 19 days
Weighted-Average Exercise Price, Options Outstanding	$ 27.88
Number of Exercisable Options	340
Weighted-Average Exercise Price, Exercisable Options	$ 28.29
Option Exercise Price Range Point 8
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices Range, Lower Range Limit	$ 29.80
Exercise Prices Range, Upper Range Limit	$ 40.56
Number of Options Outstanding	1,495
Weighted-Average Remaining Contractual Life, Options Outstanding	4 years 3 months 11 days
Weighted-Average Exercise Price, Options Outstanding	$ 30.54
Number of Exercisable Options	669
Weighted-Average Exercise Price, Exercisable Options	$ 31.16