Commitments and Contingencies - Additional Details (Details) $ in Millions, ₪ in Billions					12 Months Ended
	May 31, 2019 plaintiff	Jan. 16, 2019 product defendant	Jun. 28, 2017 USD ($) product defendant	Jun. 28, 2017 ILS (₪) product defendant	Dec. 31, 2019 USD ($) $ / ₪	Dec. 31, 2018 USD ($) case	Dec. 31, 2017 USD ($) case	Feb. 12, 2020 product case	Dec. 27, 2019 defendant	Dec. 23, 2019 defendant	Dec. 20, 2019 product plaintiff case	Dec. 18, 2019 product plaintiff case	Dec. 16, 2019 defendant	Dec. 11, 2019 defendant	Nov. 14, 2019 class	Jul. 18, 2019 manufacturer individual health_plan	Feb. 22, 2019 product plaintiff case defendant	Feb. 14, 2019 defendant	Feb. 06, 2019 product case defendant	Jan. 31, 2019 product case defendant	Nov. 15, 2018 product case	Oct. 29, 2018 product case defendant	Aug. 03, 2018 product manufacturer	Apr. 20, 2018 product case	Feb. 16, 2018 case defendant	Feb. 13, 2018 product case defendant	Jan. 26, 2018 product plaintiff case complaint	Jan. 16, 2018 product defendant	Nov. 01, 2017 defendant	Jun. 21, 2017 product individual	Dec. 28, 2013 product manufacturer supermarket	Dec. 31, 2011 product manufacturer class
Loss Contingencies [Line Items]
Number of classes | class															3																	3
Future lease maturities | $					$ 158.2
Rent expense under all leases | $					48.8	$ 51.2	$ 50.9
Purchase obligation | $					$ 845.9
Number of manufacturers | manufacturer																																27
Number of generic prescription pharmaceuticals | product																											6			6		15
Number of individuals | individual																														11
Number of plaintiff groups | plaintiff																											2
Number of complaints | complaint																											2
Number of cases																											2
Number of overlapped cases																											2
Number of drugs | product																																2
Price-Fixing Lawsuit, Supermarket Chains
Loss Contingencies [Line Items]
Number of manufacturers | manufacturer																															35
Number of supermarket chains | supermarket																															3
Number of generic prescription pharmaceuticals | product																															31
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 | 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 co-defendants | defendant										28
Price-fixing Lawsuit, Healthcare Management Organization
Loss Contingencies [Line Items]
Number of co-defendants | defendant									25
Price-fixing Lawsuit, Health Plans
Loss Contingencies [Line Items]
Number of health plans | health_plan																87
Number of manufacturers | manufacturer																53
Number of individuals | individual																17
Carmignac Gestion, S.A. v. Perrigo Company plc, et al.
Loss Contingencies [Line Items]
Number of co-defendants | defendant																													3
Manning & Napier Advisors, LLC v. Perrigo Company plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product																												6
Number of co-defendants | defendant																												3
Harel Insurance Company, LTD., et al. v. Perrigo Company plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product																										6
Number of co-defendants | defendant																										2
Number of opt out cases																										4
First Manhattan Co. v. Perrigo Company plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals																									6
Number of co-defendants | defendant																									3
Number of opt out cases																									5
TIAA-CREF Investment Management, LLC., et al. v. Perrigo Company plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product																								6
Number of opt out cases																								6
Nationwide Mutual Funds, et al. v. Perrigo Company plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product																						6
Number of co-defendants | defendant																						2
Number of opt out cases																						7
WCM Alternative: Event-Drive Fund, et al. v. Perrigo Co., plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product																					6
Number of opt out cases																					8
Hudson Bay Master Fund Ltd., et al. v. Perrigo Co., plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals																					6
Number of opt out cases																					9
Schwab Capital Trust, et al. v. Perrigo Company plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product																				6
Number of co-defendants | defendant																				2
Number of opt out cases																				10
OZ Master Fund, Ltd., et al. v. Perrigo Company plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product																			6
Number of co-defendants | defendant																			2
Number of opt out cases																			11
Highfields Capital I LP, et al. v. Perrigo Company plc, et al.
Loss Contingencies [Line Items]
Number of co-defendants | defendant																		2
Aberdeen Canada Funds - Global Equity Fund, et al. v. Perrigo Company plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product																	6
Number of co-defendants | defendant																	2
Number of other entities | plaintiff																	30
Number of opt out cases																	12
Discovery Global Citizens Master Fund, Ltd., et al. v. Perrigo Co. plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product												6
Number of Other Funds in Same Plaintiff Group | plaintiff												3
Number of Cases with Similar Factual Allegations												4
Number of opt out cases												12
York Capital Management, L.P., et al. v. Perrigo Co. plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product											6
Number of Other Funds in Same Plaintiff Group | plaintiff											6
Number of Cases with Similar Factual Allegations											4
Number of opt out cases											13
Cases Filed in Israel
Loss Contingencies [Line Items]
Number of cases							3
Number of cases dismissed						1
Number of cases stayed						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
Foreign currency exchange rate, remeasurement | $ / ₪					0.28
Number of current or former directors and officers | defendant			11	11
Preliminary class damages			$ 760.0	₪ 2.7
In re Perrigo Company plc Sec. Litig.
Loss Contingencies [Line Items]
Number of defendants added | plaintiff	1
Subsequent Event | Burlington Loan Management DAC v. Perrigo Co. plc, et al.
Loss Contingencies [Line Items]
Number of generic prescription pharmaceuticals | product								6
Number of Cases with Similar Factual Allegations								6
Number of opt out cases								14