Contingencies (Details) € in Millions, $ in Millions, ₪ in Billions									3 Months Ended		6 Months Ended	9 Months Ended
	Nov. 05, 2021 lawsuit	Oct. 15, 2021 tender lawsuit	Sep. 30, 2021 complaint claim	Sep. 26, 2020 retailer lawsuit claim	May 31, 2019 individual	Jan. 16, 2019 genericPrescriptionPharmaceutical defendant	Jun. 28, 2017 USD ($) individual case genericPrescriptionPharmaceutical $ / ₪	Jun. 28, 2017 ILS (₪) individual case genericPrescriptionPharmaceutical $ / ₪	Mar. 30, 2019 brand case	Mar. 31, 2018 case	Jun. 27, 2020 case	Oct. 02, 2021 USD ($) defendant genericPrescriptionPharmaceutical lawsuit case individual complaint class	Oct. 08, 2021 individual manufacturer healthPlan	Aug. 30, 2021 pharmaceuticalCompany	Aug. 27, 2021 USD ($)	Aug. 27, 2021 EUR (€)	May 31, 2021 policyPeriod	Dec. 31, 2020 USD ($) manufacturer	Dec. 15, 2020 brand pharmaceuticalCompany manufacturer	Dec. 14, 2020 manufacturer	Dec. 11, 2020 manufacturer	Sep. 04, 2020 manufacturer	Aug. 27, 2020 manufacturer	Jul. 14, 2020 brand manufacturer case	Jul. 09, 2020 pharmaceuticalCompany	Jun. 10, 2020 employee pharmaceuticalProduct manufacturer plaintiffGroup	Jun. 09, 2020 manufacturer	May 31, 2020 individual manufacturer healthPlan	Mar. 01, 2020 defendant	Dec. 27, 2019 defendant	Dec. 23, 2019 defendant	Dec. 16, 2019 defendant	Dec. 11, 2019 defendant	Nov. 14, 2019 class	Jul. 18, 2019 healthPlan individual manufacturer	Apr. 30, 2019 genericPrescriptionPharmaceutical pharmaceuticalProduct manufacturer	Dec. 31, 2018 case	Dec. 21, 2018 genericPrescriptionPharmaceutical manufacturer	Aug. 03, 2018 genericPrescriptionPharmaceutical manufacturer	Jul. 31, 2018 individual	Jan. 22, 2018 supermarket manufacturer genericPrescriptionPharmaceutical	Dec. 31, 2017 USD ($)	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 | $												$ 96.9
Insurance recovery receivable | $												83.4
Insurance coverage available to defend and satisfy judgments, number of policy periods | policyPeriod																	1
Israel Tax Authority
Loss Contingencies [Line Items]
Payment to resolve tax liability indemnity | $												12.5
Level 3
Loss Contingencies [Line Items]
Guaranty liability | $												$ 0.6						$ 13.2																								$ 13.8
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, 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, 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
Price-fixing Lawsuit, Medicare Advantage Claims Recovery Company
Loss Contingencies [Line Items]
Number of co-defendants | defendant																																39
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, Healthcare Management Organization
Loss Contingencies [Line Items]
Number of co-defendants | defendant																														25
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, Westchester County, NY
Loss Contingencies [Line Items]
Number of other pharmaceutical companies | pharmaceuticalCompany														45
Price-fixing Lawsuit, Pennsylvania State Court | Subsequent Event
Loss Contingencies [Line Items]
Number of manufacturers													46
Number of health plans | healthPlan													20
Number of individuals | individual													24
Price-fixing Lawsuit, Harris County of Texas
Loss Contingencies [Line Items]
Number of co-defendants | defendant																													29
Price-fixing Lawsuit, Health Plans
Loss Contingencies [Line Items]
Number of manufacturers																																			53
Number of health plans | healthPlan																												7							87
Number of individuals | individual																												17							17
Number of dozens of manufacturers																												3
State Attorney General Complaint
Loss Contingencies [Line Items]
Number of manufacturers																										35
Number of generic prescription pharmaceuticals | pharmaceuticalProduct																										80
Number of additional states and territories | plaintiffGroup																										50
Number of former employees | employee																										1
Number of current employees | employee																										1
Canadian Class Action Complaint
Loss Contingencies [Line Items]
Number of manufacturers																		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
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 individuals | individual																																								11
Number of cases with similar factual allegations | case												2
Number of current or former directors and officers | individual												13
Number of defendants added | defendant												2
Number of defendants dismissed without prejudice | individual																																								8
Blackrock Global Complaint
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical												6
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
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							$ 760.0	₪ 2.7
Foreign currency exchange rate, remeasurement | $ / ₪							0.28	0.28
Claim Arising from the Omega Acquisition | Judicial Ruling | Damages Awarded
Loss Contingencies [Line Items]
Estimated litigation settlement receivable															$ 417.6	€ 355.0
Talcum Powder Litigation | Subsequent Event
Loss Contingencies [Line Items]
Number of lawsuits | lawsuit		57
Number of tenders accepted for a portion of the defense costs and liability from a retailer | tender		1
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 | complaint			1
Number of appeals of personal injury claims | claim			2
Ranitidine Litigation | Subsequent Event
Loss Contingencies [Line Items]
Number of personal injury lawsuits | lawsuit	280
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 the United States (Cases Related to Irish Tax Events)
Loss Contingencies [Line Items]
Number of defendants | individual					3
Number of defendants added | individual					1
In Israel (Cases Related to Irish Tax Events)
Loss Contingencies [Line Items]
Number of cases stayed | case											2
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