Goodwill And Other Intangible Assets (Schedule Of Intangible Assets) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Gross carrying amount	$ 752,614,000		$ 747,398,000
Accumulated amortization	425,158,000		404,026,000
Estimated useful lives of intangible assets, minimum	3
Estimated useful lives of intangible assets, maximum	7
Product Related Intangible Assets [Member]
Gross carrying amount	482,592,000		472,582,000
Accumulated amortization	282,622,000		268,332,000
Amortization expense	16,500,000	12,700,000
Other Intangible Assets [Member]
Gross carrying amount	270,022,000		274,816,000
Accumulated amortization	142,536,000		135,694,000
Amortization expense	10,500,000	3,500,000
Patents [Member]
Estimated useful lives of intangible assets, maximum	10
Cloud.Com [Member] | Trade Names [Member]
Impairment of Intangible Assets (Excluding Goodwill)	5,200,000
Finite-lived intangible assets, net	$ 0