Goodwill And Other Intangible Assets (Schedule Of Intangible Assets) (Details) (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013
Statement [Line Items]
Gross carrying amount	$ 1,141,631,000				$ 1,141,631,000				$ 1,160,427,000
Accumulated amortization	695,988,000				695,988,000				650,832,000
Amortization expense	64,840,000	[1]	34,860,000	[1]	101,600,000	[1]	69,987,000	[1]
Product Related Intangible Assets [Member]
Statement [Line Items]
Gross carrying amount	654,631,000				654,631,000				677,509,000
Accumulated amortization	451,062,000				451,062,000				428,418,000
Other [Member]
Statement [Line Items]
Gross carrying amount	487,000,000				487,000,000				482,918,000
Accumulated amortization	244,926,000				244,926,000				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
Enterprise and Service Provider Division [Member]
Statement [Line Items]
Non-cash impairment charges					29,600,000
Cost of net revenues [Member] | Product Related Intangible Assets [Member]
Statement [Line Items]
Amortization expense	54,400,000		24,300,000		78,700,000		49,100,000
Operating Expenses [Member] | Other [Member]
Statement [Line Items]
Amortization expense	10,400,000		10,500,000		22,900,000		20,900,000
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.