Net Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jan. 31, 2012		Jan. 31, 2011
Net Income Per Share [Abstract]
Net income	$ 56,694		$ 48,226
Weighted-average common shares for basic net income per share	143,882		149,016
Dilutive effect of common share equivalents from equity-based compensation	3,231		4,624
Weighted-average common shares for diluted net income per share	147,113		153,640
Basic	$ 0.39		$ 0.32
Diluted	$ 0.39		$ 0.31
Anti-dilutive employee stock-based awards excluded	3,876	[1]	3,561	[1]

[1] These stock options and unvested restricted stock units and restricted stock awards 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.