Cover Page Document - USD ($)	12 Months Ended
	Dec. 31, 2019	Feb. 07, 2020	Jun. 30, 2019
Cover page.
Document Type	10-K
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock, par value $.001 per share
Trading Symbol	CTXS
City Area Code	954
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	851 West Cypress Creek Road
Entity Address, City or Town	Fort Lauderdale
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33309
Entity File Number	0-27084
Document Transition Report	false
Document Annual Report	true
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Registrant Name	CITRIX SYSTEMS, INC.
Entity Central Index Key	0000877890
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		122,358,166
Entity Well-known Seasoned Issuer	Yes
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 11,868,735,433
Entity Tax Identification Number	75-2275152
Local Phone Number	267-3000
Security Exchange Name	NASDAQ
Documents Incorporated by Reference	The registrant intends to file a definitive proxy statement pursuant to Regulation 14A within 120 days of the end of the fiscal year ended December 31, 2019. Portions of such definitive proxy statement are incorporated by reference into Part III of this Annual Report on Form 10-K.