Net Income Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2012		Oct. 31, 2011		Oct. 31, 2010
Net Income Loss Per Common Share [Line Items]
Net income	$ 182,402		$ 221,364		$ 237,063
Weighted average common shares for basic net income per share	146,887		146,573		148,013
Dilutive effect of common share equivalents from equity-based compensation	3,393		3,794		3,898
Weighted average common shares for diluted net income per share	150,280		150,367		151,911
Basic	$ 1.24		$ 1.51		$ 1.60
Diluted	$ 1.21		$ 1.47		$ 1.56
Anti-dilutive employee stock-based awards excluded	3,314	[1]	4,669	[1]	10,999	[1]

[1] These stock options and unvested restricted stock units were anti-dilutive for the respective periods and are excluded in calculating diluted net income per share. While such awards were anti-dilutive for the respective periods, they could be dilutive in the future.