Segment Information (Revenues By Product Grouping) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Segment Reporting Information [Line Items]
Net revenues	$ 758,994		$ 712,731		$ 2,291,373		$ 2,116,014
Enterprise and Service Provider Division [Member]
Segment Reporting Information [Line Items]
Net revenues	593,741		564,552		1,808,209		1,686,411
Enterprise and Service Provider Division [Member] | Mobile and Desktop Revenues [Member]
Segment Reporting Information [Line Items]
Net revenues	392,875	[1]	380,878	[1]	1,170,103	[1]	1,121,102	[1]
Enterprise and Service Provider Division [Member] | Networking and Cloud Revenues [Member]
Segment Reporting Information [Line Items]
Net revenues	155,388	[2]	146,474	[2]	501,231	[2]	458,753	[2]
Enterprise and Service Provider Division [Member] | Professional Services [Member]
Segment Reporting Information [Line Items]
Net revenues	42,322	[3]	33,725	[3]	126,775	[3]	96,653	[3]
Enterprise and Service Provider Division [Member] | Other [Member]
Segment Reporting Information [Line Items]
Net revenues	3,156		3,475		10,100		9,903
SaaS Division [Member]
Segment Reporting Information [Line Items]
Net revenues	$ 165,253		$ 148,179		$ 483,164		$ 429,603

[1] Mobile and Desktop revenues are primarily comprised of sales from the Company’s desktop and application virtualization products, XenDesktop and XenApp, and the Company's Mobility products, which include XenMobile and related license updates and maintenance and support.

[2] Networking and Cloud revenues are primarily comprised of sales from the Company’s cloud networking products, which include NetScaler, CloudBridge and Bytemobile Smart Capacity, and the Company’s cloud platform products which include XenServer, CloudPlatform and CloudPortal and related license updates and maintenance and support.

[3] Professional services revenues are primarily comprised of revenues from consulting services and product training and certification services.