Document and Entity Information Document	9 Months Ended
	Sep. 30, 2017 shares
Document and Entity Information [Abstract]
Entity registrant name	PERRIGO CO PLC
Entity central index key	0001585364
Current calendar year end date	--12-31
Entity filer category	Large Accelerated Filer
Document type	10-Q
Document period end date	Sep. 30, 2017
Document calendar year focus	2017
Document calendar period focus	Q3
Amendment flag	false
Entity common stock, shares outstanding	140,840,721
Entity well-known seasoned issuer	Yes
Entity voluntary filers	No
Entity current reporting status	Yes