Document and Entity Information Document	6 Months Ended
	Jul. 01, 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	Jul. 01, 2017
Document calendar year focus	2017
Document calendar period focus	Q2
Amendment flag	false
Entity common stock, shares outstanding	142,611,088
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes