Other Intangible Assets (Details) (USD $)	9 Months Ended		12 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Oct. 31, 2010
Other Intangible Assets
Gross intangible	$ 786,794,000		$ 786,794,000
Accumulated Amortization	(436,949,000)		(360,382,000)
Net Intangible	349,845,000		426,412,000
Expected future amortization of finite-lived other intangible assets
2011			20,102,000
2012			73,564,000
2013			71,145,000
2014			56,987,000
2015			52,714,000
Thereafter			75,333,000
Total			349,845,000
Other Intangible Assets (Textuals) [Abstract]
Amortization expense of finite-lived other intangible assets	76,600,000	82,500,000
Developed Technology [Member]
Other Intangible Assets
Gross intangible	417,833,000		417,833,000
Accumulated Amortization	(222,327,000)		(186,129,000)
Net Intangible	195,506,000		231,704,000
Patents And Licenses [Member]
Other Intangible Assets
Gross intangible	45,388,000		45,388,000
Accumulated Amortization	(45,272,000)		(45,167,000)
Net Intangible	116,000		221,000
Customer Relationships Covenants Not To Compete Outstanding Purchase Orders And Contracts [Member]
Other Intangible Assets
Gross intangible	323,573,000		323,573,000
Accumulated Amortization	(169,350,000)		(129,086,000)
Net Intangible	$ 154,223,000		$ 194,487,000