Significant Accounting Policies - Reclassifications (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total net revenues		$ 732,476	$ 690,925	[1]	$ 2,172,033	$ 2,046,829	[1]
Amount Reclassified [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Software as a service			35,563			99,007
Total net revenues			0			0
Subscription [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total net revenues		111,539	81,373		325,493	225,060
Product and License [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total net revenues		170,952	168,716		523,707	529,990
Product and License [Member] | Amount Reclassified [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total net revenues	[2]		(23,386)			(64,718)
Support and Services [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total net revenues		$ 449,985	440,836	[3]	$ 1,322,833	1,291,779	[3]
Support and Services [Member] | Amount Reclassified [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total net revenues	[4]		19,885			59,045
Technology Service [Member] | Amount Reclassified [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total net revenues			(32,062)			(93,334)
As Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Software as a service			45,810			126,053
Total net revenues			690,925			2,046,829
As Previously Reported [Member] | Product and License [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total net revenues	[2]		192,102			594,708
As Previously Reported [Member] | Support and Services [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total net revenues	[4]		420,951			1,232,734
As Previously Reported [Member] | Technology Service [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total net revenues			$ 32,062			$ 93,334

[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] Product and licenses as previously reported included revenue from CSPs and on-premise subscriptions that are now included in Subscription. Current period presentation only includes revenues from perpetual offerings and hardware.

[3] Support and services includes revenues from license updates and maintenance from perpetual offerings as well as professional services.

[4] License updates and maintenance as previously reported included revenue from CSPs and on-premise license updates and maintenance that are now included in Subscription.