Goodwill And Other Intangible Assets (Schedule Of Change In Goodwill) (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013		Jul. 31, 2012
Goodwill [Roll Forward]
Balance at January 1, 2013		$ 1,518,219,000
Additions		249,393,000	[1]
Other		(4,898,000)
Balance at June 30, 2013	1,762,714,000	1,762,714,000
Infrastructure [Member]
Goodwill [Roll Forward]
Balance at January 1, 2013		1,158,580,000
Additions		249,393,000
Other		(2,025,000)	[2]
Balance at June 30, 2013	1,405,948,000	1,405,948,000
SaaS [Member]
Goodwill [Roll Forward]
Balance at January 1, 2013		359,639,000
Additions		0
Other		(2,873,000)	[3]
Balance at June 30, 2013	356,766,000	356,766,000
Bytemobile [Member]
Goodwill [Roll Forward]
Balance at January 1, 2013				223,908,000
Balance at June 30, 2013				223,908,000
Purchase accounting adjustments	400,000	1,400,000
Deferred tax assets and liabilities [Member] | Bytemobile [Member]
Goodwill [Roll Forward]
Purchase accounting adjustments		7,300,000
Deferred revenue, current [Member] | Bytemobile [Member]
Goodwill [Roll Forward]
Purchase accounting adjustments		$ 5,900,000

[1] Amount relates to Zenprise 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 $7.3 million, partially offset by a $5.9 million adjustment to current portion of deferred revenues.

[3] Amount primarily relates to foreign currency translation.