Segment Information (Revenues By Geographic Location) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 732,476	$ 690,925	[1]	$ 2,172,033	$ 2,046,829	[1]
Operating Segments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	732,476	690,925	[2]	2,172,033	2,046,829	[2]
Operating Segments [Member] | Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	432,689	406,322	[1]	1,276,873	1,200,740	[1]
Operating Segments [Member] | EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	228,236	213,954	[1]	676,942	633,119	[1]
Operating Segments [Member] | APJ [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 71,551	$ 70,649	[1]	$ 218,218	$ 212,970	[1]

[1] Workspace Services revenues are primarily comprised of sales from the Company’s application virtualization solutions, which include XenDesktop and XenApp, the Company's enterprise mobility management solutions, which include XenMobile, and Citrix Workspace, and related license updates, maintenance and subscription offerings.

[2] Prior period amounts have not been adjusted under the modified retrospective method of adoption of the revenue recognition standard. See Note 2 for further information regarding the Company’s adoption of the revenue recognition standard.