Goodwill And Other Intangible Assets (Schedule Of Change In Goodwill) (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013		Jul. 31, 2012
Goodwill [Roll Forward]
Balance at January 1, 2013		$ 1,518,219,000
Additions		251,766,000	[1]
Other		(3,083,000)
Balance at September 30, 2013	1,766,902,000	1,766,902,000
Infrastructure [Member]
Goodwill [Roll Forward]
Balance at January 1, 2013		1,158,580,000
Additions		249,392,000
Other		(4,683,000)	[2]
Balance at September 30, 2013	1,403,289,000	1,403,289,000
SaaS [Member]
Goodwill [Roll Forward]
Balance at January 1, 2013		359,639,000
Additions		2,374,000
Other		1,600,000	[3]
Balance at September 30, 2013	363,613,000	363,613,000
Bytemobile [Member]
Goodwill [Roll Forward]
Balance at January 1, 2013				221,251,000
Balance at September 30, 2013				221,251,000
Purchase accounting adjustments	2,700,000	4,100,000
Deferred tax assets and liabilities [Member] | Bytemobile [Member]
Goodwill [Roll Forward]
Purchase accounting adjustments		10,000,000
Deferred revenue, current [Member] | Bytemobile [Member]
Goodwill [Roll Forward]
Purchase accounting adjustments		$ 5,900,000

[1] Amounts relate to Zenprise and 2013 Other Acquisition. See Note 4 for more information regarding the Company’s acquisitions.

[2] Amount primarily relates to adjustments to the preliminary purchase price allocation associated with the Bytemobile acquisition, primarily related to adjustments of certain income tax assets and liabilities of $10.0 million, partially offset by a $5.9 million adjustment to current portion of deferred revenues.

[3] Amount primarily relates to foreign currency translation.