Contingencies (Details) $ in Millions					2 Months Ended	12 Months Ended
	Jan. 16, 2019 product defendant	Nov. 21, 2018 ILS (₪)	Jun. 28, 2017 USD ($) product defendant	Jun. 28, 2017 ILS (₪) product defendant	Nov. 30, 2011 application	Dec. 31, 2018 case	Mar. 30, 2019 dozens $ / ₪	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 complaint plaintiff case	Jan. 16, 2018 product defendant	Dec. 31, 2017 case	Nov. 01, 2017 defendant	Jun. 21, 2017 product individual	Dec. 28, 2013 product supermarket manufacturer	Dec. 31, 2011 product manufacturer
Loss Contingencies [Line Items]
Number of manufacturers | manufacturer																								27
Number of generic prescription pharmaceuticals | product																		6				6		15
Number of products manufactured by the Company | product																								2
Number of dozens of other drugs | dozens							2
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
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
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 additional plaintiffs | plaintiff								30
Number of opt out cases								12
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
Number of current or former directors and officers | defendant			11	11
Damages sought by plaintiff			$ 760.0	₪ 2,700,000,000
Foreign currency exchange rate, remeasurement | $ / ₪							0.28
Eltroxin Class Action
Loss Contingencies [Line Items]
Number of applications filed | application					9
Number of applications dismissed | application					1
Number of applications consolidated | application					8
Damages sought, value per patient | ₪		₪ 250