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Fair Value Measurements (Additional Information Regarding Fair Value Measurements) (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Convertible Senior Notes $ 1,300,872,000us-gaap_ConvertibleDebtNoncurrent $ 1,292,953,000us-gaap_ConvertibleDebtNoncurrent
Level 2 [Member] | Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Closing trading price per $100 as of the last day of trading for the quarter 100ctxs_ConvertibleDebtFairValueTradingPriceMultiple
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		  
Convertible Senior Notes 1,519,668,000us-gaap_ConvertibleDebtFairValueDisclosures
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		  
Senior Notes Due 2019 [Member] | Level 2 [Member] | Carrying Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Convertible Senior Notes $ 1,300,872,000us-gaap_ConvertibleDebtNoncurrent
/ us-gaap_DebtInstrumentAxis
= ctxs_SeniorNotesDue2019Member
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember