Contingencies (Details) $ in Millions, ₪ in Billions							1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 13, 2021 lawsuit tender	Apr. 11, 2021 complaint	May 31, 2019 individual	Jan. 16, 2019 defendant genericPrescriptionPharmaceutical	Jun. 28, 2017 ILS (₪) case individual genericPrescriptionPharmaceutical $ / ₪	Jun. 28, 2017 USD ($) case individual genericPrescriptionPharmaceutical $ / ₪	Sep. 30, 2020 lawsuit	Apr. 03, 2021 USD ($) claim case defendant genericPrescriptionPharmaceutical retailer complaint class appeal individual lawsuit	Dec. 31, 2019 case	Dec. 31, 2018 case brand	Dec. 31, 2017 case	Dec. 15, 2020 manufacturer brand pharmaceuticalCompany	Dec. 14, 2020 manufacturer	Dec. 11, 2020 manufacturer	Sep. 04, 2020 manufacturer	Aug. 27, 2020 manufacturer	Jul. 14, 2020 case brand manufacturer	Jul. 09, 2020 pharmaceuticalCompany	Jun. 30, 2020 manufacturer	Jun. 10, 2020 employee plaintiffGroup manufacturer	Jun. 09, 2020 manufacturer	May 31, 2020 individual manufacturer healthPlan	Mar. 01, 2020 defendant	Dec. 27, 2019 defendant	Dec. 23, 2019 defendant	Dec. 16, 2019 defendant	Dec. 11, 2019 defendant	Nov. 14, 2019 class	Jul. 18, 2019 individual manufacturer healthPlan	Apr. 30, 2019 manufacturer genericPrescriptionPharmaceutical pharmaceuticalProduct	Dec. 21, 2018 manufacturer genericPrescriptionPharmaceutical	Aug. 03, 2018 genericPrescriptionPharmaceutical manufacturer	Jul. 31, 2018 individual	Jan. 22, 2018 supermarket manufacturer genericPrescriptionPharmaceutical	Jun. 30, 2017 case	Jun. 21, 2017 individual genericPrescriptionPharmaceutical class
Loss Contingencies [Line Items]
Number of putative classes | class								3																				3								3
Number of sets of class action complaints | complaint								2
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical																																				6
Number of individuals | individual																																				11
Number of current or former directors and officers | individual																																				11
Loss accrual for litigation contingencies | $								$ 65.0
Insurance recovery receivable | $								$ 65.0
States' May 2019 Case Alleging Conspiracy (which does not Name Perrigo a Defendant)
Loss Contingencies [Line Items]
Number of products included in expedited cases | brand																	120
Number of manufacturers																	35
Overarching Conspiracy Class Actions
Loss Contingencies [Line Items]
Number of manufacturers																														27
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical																														135
Number of formulations of products manufactured by the Company | genericPrescriptionPharmaceutical																														2
Number of products manufactured by the Company | pharmaceuticalProduct																														1
Number of cases included in expedited schedule | case																	0
Price-Fixing Lawsuit, Drugstore Chain
Loss Contingencies [Line Items]
Number of manufacturers												45		45
Number of products manufactured by the Company | brand												63
Number of other pharmaceutical companies | pharmaceuticalCompany																		39
Price-Fixing Lawsuit, Suffolk County of New York
Loss Contingencies [Line Items]
Number of manufacturers																35
Price-Fixing Lawsuit, Drug Wholesaler and Distributor
Loss Contingencies [Line Items]
Number of manufacturers															39
State Attorney General Complaint
Loss Contingencies [Line Items]
Number of manufacturers																				35
Number of former employees | employee																				1
Number of current employees | employee																				1
Number of additional states and territories | plaintiffGroup																				50
Canadian Class Action Complaint
Loss Contingencies [Line Items]
Number of manufacturers																			29
Price-Fixing Lawsuit, Supermarket Chains
Loss Contingencies [Line Items]
Number of manufacturers													45																					35
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical																																		31
Number of supermarket chains | supermarket																																		3
Price-Fixing Lawsuit, Supermarket Chains, Amended Complaint
Loss Contingencies [Line Items]
Number of manufacturers																															39
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical																															33
Price-fixing Lawsuit, Managed Care Organization
Loss Contingencies [Line Items]
Number of manufacturers																																27
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical																																17
Price-fixing Lawsuit, Health Insurance Carrier
Loss Contingencies [Line Items]
Number of manufacturers																					25
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical				30
Number of defendants | defendant				30
Price-fixing Lawsuit, Healthcare Service Company
Loss Contingencies [Line Items]
Number of co-defendants | defendant																											38
Price-fixing Lawsuit, Medicare Advantage Claims Recovery Company
Loss Contingencies [Line Items]
Number of co-defendants | defendant																										39
Price-fixing Lawsuit, Several Counties in New York
Loss Contingencies [Line Items]
Number of other pharmaceutical companies | pharmaceuticalCompany												45
Number of co-defendants | defendant																									28
Price-fixing Lawsuit, Healthcare Management Organization
Loss Contingencies [Line Items]
Number of co-defendants | defendant																								25
Price-fixing Lawsuit, Harris County of Texas
Loss Contingencies [Line Items]
Number of co-defendants | defendant																							29
Highfields Capital I LP, et al. v. Perrigo Company plc, et al.
Loss Contingencies [Line Items]
Number of cases alleging only state law claims | lawsuit								1
Price-fixing Lawsuit, Health Plans
Loss Contingencies [Line Items]
Number of manufacturers																													53
Number of health plans | healthPlan																						7							87
Number of dozens of manufacturers																						3
Number of individuals | individual																						17							17
Blackrock Global Complaint
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical								6
Israel Elec. Corp. Employees' Educ. Fund v. Perrigo Company plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical					6	6
Number of cases voluntarily dismissed | case					2	2
Number of current or former directors and officers | individual					11	11
Damages sought by plaintiff					₪ 2.7	$ 760.0
Foreign currency exchange rate, remeasurement | $ / ₪					0.28	0.28
Ranitidine Litigation
Loss Contingencies [Line Items]
Number of master complaints | complaint								3
Number of master complaints naming the company | complaint								3
Number of appeals of master complaints | appeal								1
Number of appeals of personal injury claims | appeal								2
Carmignac, First Manhattan and Similar Cases
Loss Contingencies [Line Items]
Number of cases with similar factual allegations | case								7
First Manhattan and Similar Cases
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | case								6
Mason Capital, Pentwater and Similar Cases
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical								6
Number of cases with similar factual allegations | case								8
Number of current or former directors and officers | case								11
Harel Insurance and TIAA-CREF Cases
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical								6
Number of cases with similar factual allegations | case								2
Number of individuals | individual																																	11
Number of current or former directors and officers | individual								13
Number of defendants added | defendant								2
Other Cases Related to Events in 2015-2017
Loss Contingencies [Line Items]
Number of cases with similar factual allegations | case																																			1
Number of overlapped cases | case																																			3
In Israel (Cases Related to Events in 2015-2017)
Loss Contingencies [Line Items]
Number of cases | case										3
Number of cases voluntarily dismissed | case										1	1
Number of cases stayed | brand										1
In Israel (Cases Related to Irish Tax Events)
Loss Contingencies [Line Items]
Number of cases stayed | case									2
In the United States (Cases Related to Irish Tax Events)
Loss Contingencies [Line Items]
Number of defendants | individual			3
Number of defendants added | individual			1
Acetaminophen Litigation
Loss Contingencies [Line Items]
Number of lawsuits | lawsuit							1
Number of claims for indemnification or defense | claim								16
Number of retailers | retailer								10
Subsequent Event | Talcum Powder Litigation
Loss Contingencies [Line Items]
Number of lawsuits | lawsuit	51
Number of tenders accepted for a portion of the defense costs and liability from a retailer | tender	1
Subsequent Event | Ranitidine Litigation
Loss Contingencies [Line Items]
Number of personal injury lawsuits | complaint		187