Contingencies (Details) $ in Millions, ₪ in Billions						1 Months Ended		9 Months Ended	12 Months Ended
	Oct. 06, 2020 lawsuit	May 31, 2019 defendant	Jan. 16, 2019 product defendant	Jun. 28, 2017 USD ($) product case defendant	Jun. 28, 2017 ILS (₪) product case defendant	Sep. 26, 2020 lawsuit case retailer claim individual defendant $ / ₪	Feb. 29, 2020 complaint	Sep. 26, 2020 lawsuit case tender individual defendant $ / ₪	Dec. 31, 2019 case	Dec. 31, 2018 case	Dec. 31, 2017 case	Sep. 04, 2020 manufacturer	Aug. 27, 2020 manufacturer	Jul. 14, 2020 product case	Jul. 09, 2020 pharmaceutical_company	Jun. 27, 2020 manufacturer	Jun. 10, 2020 defendant manufacturer plaintiff	Jun. 09, 2020 manufacturer	May 31, 2020 manufacturer health_plan defendant	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 manufacturer individual health_plan	Apr. 30, 2019 product manufacturer	Dec. 21, 2018 product manufacturer	Aug. 03, 2018 product manufacturer	Jul. 31, 2018 defendant	Jul. 27, 2018 product	Jan. 22, 2018 product manufacturer supermarket	Jun. 21, 2017 product individual class	May 31, 2017 product	Apr. 30, 2017 product	Dec. 31, 2011 class
Loss Contingencies [Line Items]
Number of putative classes | class																									3								3			3
Number of sets of class action complaints | class																																				2
Number of generic prescription pharmaceuticals | product																															6		6
Number of individuals | individual																																	11
States' May 2019 Case Alleging Conspiracy (which does not Name Perrigo a Defendant)
Loss Contingencies [Line Items]
Number of products included in expedited cases | product														120
Overarching Conspiracy Class Actions
Loss Contingencies [Line Items]
Number of manufacturers | manufacturer																		25									27
Number of generic prescription pharmaceuticals | product																											135
Number of formulations of products manufactured by the company | product																											2
Number of products manufactured by the Company | product																											1
Number of cases included in expedited schedule | case														0
Price-Fixing Lawsuit, Drugstore Chain
Loss Contingencies [Line Items]
Number of Other Pharmaceutical Companies | pharmaceutical_company															39
Price-Fixing Lawsuit, Suffolk County of New York
Loss Contingencies [Line Items]
Number of manufacturers | manufacturer													35
Price-Fixing Lawsuit, Drug Wholesaler and Distributor
Loss Contingencies [Line Items]
Number of manufacturers | manufacturer												39
State Attorney General Complaint
Loss Contingencies [Line Items]
Number of manufacturers | manufacturer																	35
Number of former employees																	1
Number of current employees																	1
Number of additional states and territories | plaintiff																	50
Canadian Class Action Complaint
Loss Contingencies [Line Items]
Number of manufacturers | manufacturer																29
Price-Fixing Lawsuit, Supermarket Chains
Loss Contingencies [Line Items]
Number of manufacturers | manufacturer																																35
Number of generic prescription pharmaceuticals | product																																31
Number of supermarket chains | supermarket																																3
Price-Fixing Lawsuit, Supermarket Chains, Amended Complaint
Loss Contingencies [Line Items]
Number of manufacturers | manufacturer																												39
Number of generic prescription pharmaceuticals | product																												33
Price-fixing Lawsuit, Managed Care Organization
Loss Contingencies [Line Items]
Number of manufacturers | manufacturer																													27
Number of generic prescription pharmaceuticals | product																													17
Price-fixing Lawsuit, Health Insurance Carrier
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product			30
Number of defendants			30
Price-fixing Lawsuit, Healthcare Service Company
Loss Contingencies [Line Items]
Number of co-defendants																								38
Price-fixing Lawsuit, Medicare Advantage Claims Recovery Company
Loss Contingencies [Line Items]
Number of co-defendants																							39
Price-fixing Lawsuit, Several Counties in New York
Loss Contingencies [Line Items]
Number of co-defendants																						28
Price-fixing Lawsuit, Healthcare Management Organization
Loss Contingencies [Line Items]
Number of co-defendants																					25
Price-fixing Lawsuit, Harris County of Texas
Loss Contingencies [Line Items]
Number of co-defendants																				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		1
Price-fixing Lawsuit, Health Plans
Loss Contingencies [Line Items]
Number of manufacturers | manufacturer																										53
Number of health plans | health_plan																										87
Number of individuals | individual																										17
BlackRock Global Allocation Fund, et al. v. Perrigo Co. plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product																																		6
Cases Filed in Israel
Loss Contingencies [Line Items]
Number of cases | case										3
Number of cases voluntarily dismissed | case										1	1
Number of cases stayed | case										1
Israel Elec. Corp. Employees' Educ. Fund v. Perrigo Company plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product				6	6
Number of cases voluntarily dismissed | case				2	2
Number of current or former directors and officers				11	11
Damages sought by plaintiff				$ 760.0	₪ 2.7
Foreign currency exchange rate, remeasurement | $ / ₪						0.28		0.28
In re Perrigo Company plc Sec. Litig.
Loss Contingencies [Line Items]
Number of individuals		3
Number of defendants added		1
Talcum Powder Litigation
Loss Contingencies [Line Items]
Number of lawsuits | lawsuit								32
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							2
Carmignac, First Manhattan and Similar Cases
Loss Contingencies [Line Items]
Number of cases with similar factual allegations | case						7		7
First Manhattan and Similar Cases
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product																																		6
Mason Capital, Pentwater and Similar Cases
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product																																		6
Number of cases with similar factual allegations | case						8		8
Number of individuals | individual						11		11
Harel Insurance and TIAA-CREFF Cases
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product																																			6
Number of cases with similar factual allegations | case						2		2
Number of current or former directors and officers						13		13
Number of defendants added								2
Number of defendants dismissed without prejudice																														8
Roofers' Pension Fund
Loss Contingencies [Line Items]
Number of current or former directors and officers																														11
Other Cases Related to Events in 2015-2017
Loss Contingencies [Line Items]
Number of cases with similar factual allegations | case						3		3
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						14
Loss Contingency, Number of Retailers | retailer						9
Pending Litigation
Loss Contingencies [Line Items]
Number of health plans | health_plan																			7
Number of dozens of manufacturers | manufacturer																			3
Number of individuals																			17
Subsequent Event | Ranitidine Litigation
Loss Contingencies [Line Items]
Number of lawsuits | lawsuit	42