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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2019
Feb. 21, 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 001-36353    
Entity Registrant Name Perrigo Company plc    
Entity Incorporation, State or Country Code L2    
Entity Address, Address Line One The Sharp Building,    
Entity Address, Address Line Two Hogan Place,    
Entity Address, City or Town Dublin 2,    
Entity Address, Country IE    
Entity Address, Postal Zip Code D02 TY74    
Country Region 353    
City Area Code 1    
Local Phone Number 7094000    
Title of 12(b) Security Ordinary shares, €0.001 par value    
Trading Symbol PRGO    
Security Exchange Name NYSE    
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    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 6,477,490,316
Entity Common Stock, Shares Outstanding   136,126,977  
Documents Incorporated by Reference
Documents incorporated by reference:
The information called for by Part III will be incorporated by reference from the Registrant's definitive Proxy Statement for its Annual Meeting of Shareholders to be filed pursuant to Regulation 14A or will be included in an amendment to this Form 10-K.
    
Entity Central Index Key 0001585364    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false