Goodwill And Other Intangible Assets (Schedule Of Intangible Assets) (Details) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Statement [Line Items]
Gross carrying amount	$ 1,142,413,000				$ 1,142,413,000				$ 1,160,427,000
Accumulated amortization	727,662,000				727,662,000				650,832,000
Amortization expense	33,915,000	[1]	34,716,000	[1]	135,515,000	[1]	104,703,000	[1]
Product Related Intangible Assets [Member]
Statement [Line Items]
Gross carrying amount	654,387,000				654,387,000				677,509,000
Accumulated amortization	471,191,000				471,191,000				428,418,000
Other [Member]
Statement [Line Items]
Gross carrying amount	488,026,000				488,026,000				482,918,000
Accumulated amortization	256,471,000				256,471,000				222,414,000
Minimum [Member]
Statement [Line Items]
Intangible asset life					3 years
Maximum [Member]
Statement [Line Items]
Intangible asset life					7 years
Maximum [Member] | Patents [Member]
Statement [Line Items]
Intangible asset life					10 years
Cost of net revenues [Member] | Product Related Intangible Assets [Member]
Statement [Line Items]
Amortization expense	24,000,000		24,300,000		102,700,000		73,400,000
Operating Expense [Member] | Other [Member]
Statement [Line Items]
Amortization expense	10,000,000		10,400,000		32,900,000		31,300,000
Amortization of product related intangibles [Member] | Enterprise and Service Provider Division [Member]
Statement [Line Items]
Non-cash impairment charges					$ 29,600,000

[1] Represents expenses presented to management on a consolidated basis only and not allocated to the operating segments.