Summary Of Significant Accounting Policies (Reconciliation Of Weighted Average Common Shares Used To Calculate Net Income Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2011		Oct. 31, 2010		Oct. 31, 2009
Summary Of Significant Accounting Policies [Abstract]
Net income	$ 221,364		$ 237,063		$ 167,681
Weighted average common shares for basic net income per share	146,573		148,013		143,752
Dilutive effect of common share equivalents from equity-based compensation	3,794		3,898		2,105
Weighted average common shares for diluted net income per share	150,367		151,911		145,857
Basic	$ 1.51		$ 1.60		$ 1.17
Diluted	$ 1.47		$ 1.56		$ 1.15
Anti-dilutive employee stock-based awards excluded	4,669	[1]	10,999	[1]	17,288	[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.