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Cover - USD ($)
 12 Months Ended
Dec. 31, 2019
Feb. 18, 2020
Jun. 28, 2019
Cover page.      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Entity File Number 001-33500    
Entity Registrant Name Jazz Pharmaceuticals plc    
Entity Incorporation, State or Country Code L2    
Entity Tax Identification Number 98-1032470    
Entity Address, Address Line One Fifth Floor, Waterloo Exchange    
Entity Address, Address Line Two Waterloo Road    
Entity Address, City or Town Dublin 4    
Entity Address, Country IE    
Entity Address, Postal Zip Code D04 E5W7    
Country Region 353    
City Area Code 1    
Local Phone Number 634-7800    
Title of 12(b) Security Ordinary shares, nominal value $0.0001 per share    
Trading Symbol  JAZZ    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Smaller Reporting Company false    
Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 7,869,781,340
Entity Common Stock, Shares Outstanding (in shares)   56,133,306  
Documents Incorporated by Reference
Certain information required by Part III, Items 10-14 of this Form 10‑K is incorporated by reference to the registrant’s definitive Proxy Statement for the 2020 Annual General Meeting of Shareholders to be filed with the Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this Form 10‑K, provided that if such Proxy Statement is not filed within such period, such information will be included in an amendment to this Form 10‑K to be filed within such 120-day period.
    
Amendment Flag false    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001232524    
Current Fiscal Year End Date --12-31