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Quarterly Financial Data (Unaudited) (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
Quarterly Financial Data (Textual) [Abstract]
Restructuring charges	$ 19,100	$ 6,200	$ 30,496	$ 26,746	$ 66,590
Acquisition related charges	$ 5,200	$ 7,100	$ 24,385	$ 27,176
Class A common stock [Member]
Number of stockholders'			423
Class B common stock [Member]
Number of stockholders'			104

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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