Commitments and Contingencies - Securities Litigation (Details) $ in Millions, ₪ in Billions				3 Months Ended		6 Months Ended	9 Months Ended	12 Months Ended
	May 31, 2019 individual	Jun. 28, 2017 ILS (₪) individual case genericPrescriptionPharmaceutical $ / ₪	Jun. 28, 2017 USD ($) individual case genericPrescriptionPharmaceutical $ / ₪	Mar. 30, 2019 case	Mar. 31, 2018 case	Jun. 29, 2019 brand	Sep. 26, 2020 case	Dec. 31, 2021 case individual class genericPrescriptionPharmaceutical defendant lawsuit	Nov. 14, 2019 class	Dec. 31, 2018 case	Jul. 31, 2018 individual	Jun. 30, 2017 case	Jun. 21, 2017 genericPrescriptionPharmaceutical individual class
Loss Contingencies [Line Items]
Number of classes | class								3	3				3
Number of current or former directors and officers | individual													11
Number of individuals | individual													11
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical													6
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
Mason Capital, Pentwater and Similar Cases
Loss Contingencies [Line Items]
Number of current or former directors and officers								11
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical								6
Number of cases with similar factual allegations								8
Harel Insurance and TIAA-CREFF Cases
Loss Contingencies [Line Items]
Number of current or former directors and officers | individual								13
Number of individuals | individual											11
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical								6
Number of cases with similar factual allegations								2
Number of defendants added | defendant								2
Loss Contingency, Number of Defendants Dismissed without Prejudice | individual											8
Other Cases Related to Events in 2015-2017
Loss Contingencies [Line Items]
Number of cases with similar factual allegations												1
Number of overlapped cases												3
Blackrock Global Complaint
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical								6
First Manhattan and Similar Cases
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals								6
Israel Elec. Corp. Employees' Educ. Fund v. Perrigo Company plc, et al.
Loss Contingencies [Line Items]
Number of current or former directors and officers | individual		11	11
Number of generic prescription pharmaceuticals | genericPrescriptionPharmaceutical		6	6
Number of cases dismissed		2	2
Preliminary class damages		₪ 2.7	$ 760.0
Foreign currency exchange rate, remeasurement | $ / ₪		0.28	0.28
In the United States (Cases Related to Irish Tax Events)
Loss Contingencies [Line Items]
Number of defendants added | individual	1
Number of defendants | individual	3
Carmignac, First Manhattan and Similar Cases
Loss Contingencies [Line Items]
Number of cases with similar factual allegations								7
In Israel (Cases Related to Events in 2015-2017)
Loss Contingencies [Line Items]
Number of cases										3
Number of cases dismissed				1	1
Number of cases stayed | brand						1
In Israel (Cases Related to Irish Tax Events)
Loss Contingencies [Line Items]
Number of cases stayed							2