| Document and Entity Information | May 06, 2022 |
| Document And Entity Information [Line Items] | |
| Entity Registrant Name | PERRIGO Co plc |
| Entity Tax Identification Number | 00-0000000 |
| Amendment Flag | false |
| Entity Central Index Key | 0001585364 |
| Document Type | 8-K |
| Document Period End Date | May 6, 2022 |
| Entity File Number | 001-36353 |
| Entity Incorporation State Country Code | L2 |
| Entity Address, Address Line One | The Sharp Building |
| Entity Address, Address Line Two | Hogan Place |
| Entity Address, City or Town | Dublin 2 |
| Entity Address, Country | IE |
| Entity Address, Postal Zip Code | D02 TY74 |
| City Area Code | 353 1 |
| Local Phone Number | 7094000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Ordinary shares, €0.001 par value |
| Trading Symbol | PRGO |
| Security Exchange Name | NYSE |
| M 4.000 Notes Due 2023 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 4.000% Notes due 2023 |
| Trading Symbol | PRGO23 |
| Security Exchange Name | NYSE |
| M 3.900 Notes Due 2024 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 3.900% Notes due 2024 |
| Trading Symbol | PRGO24 |
| Security Exchange Name | NYSE |
| M 4.375 Notes Due 2026 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 4.375% Notes due 2026 |
| Trading Symbol | PRGO26 |
| Security Exchange Name | NYSE |
| M 3.150 Notes Due 2030 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 3.15% Notes due 2030 |
| Trading Symbol | PRGO30 |
| Security Exchange Name | NYSE |
| M 5.300 Notes Due 2043 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 5.300% Notes due 2043 |
| Trading Symbol | PRGO43 |
| Security Exchange Name | NYSE |
| M 4.900 Notes Due 2044 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 4.900% Notes due 2044 |
| Trading Symbol | PRGO44 |
| Security Exchange Name | NYSE |
