Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 26, 2021	Jun. 26, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
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
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 7,360,836,659
Entity Common Stock, Shares Outstanding		133,096,158
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
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false