Segment Information (Revenues By Product Grouping) (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenue		$ 732,476	$ 690,925	[1]	$ 2,172,033	$ 2,046,829	[1]
Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue		732,476	690,925	[2]	2,172,033	2,046,829	[2]
Operating Segments [Member] | Workspace Services revenues [Member]
Segment Reporting Information [Line Items]
Revenue	[1]	462,101	431,592	[2]	1,329,584	1,255,728	[2]
Operating Segments [Member] | Networking revenues [Member]
Segment Reporting Information [Line Items]
Revenue	[3]	195,421	185,539	[2]	611,386	575,827	[2]
Operating Segments [Member] | Content Collaboration revenues [Member]
Segment Reporting Information [Line Items]
Revenue	[4]	46,605	41,632	[2]	137,503	121,566	[2]
Operating Segments [Member] | Professional Services [Member]
Segment Reporting Information [Line Items]
Revenue	[5]	$ 28,349	$ 32,162	[2]	$ 93,560	$ 93,708	[2]

[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.

[3] Networking revenues primarily include NetScaler ADC and NetScaler SD-WAN and related license updates, maintenance and subscription offerings.

[4] Content Collaboration revenues primarily include ShareFile, Podio and related subscriptions.

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