Cover Page - shares	9 Months Ended
	Sep. 28, 2019	Nov. 01, 2019
Cover page.
Document type	10-Q
Document Quarterly Report	true
Document period end date	Sep. 28, 2019
Document Transition Report	false
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
Trading Symbol	PRGO
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity central index key	0001585364
Entity Interactive Data Current	Yes
Current calendar year end date	--12-31
Entity filer category	Large Accelerated Filer
Entity small business	false
Entity emerging growth company	false
Entity Shell Company	false
Entity common stock, shares outstanding		136,109,593
Entity File Number	001-36353
Document calendar year focus	2019
Document calendar period focus	Q3
Amendment flag	false