Document and Entity Information |
12 Months Ended |
|---|---|
|
Dec. 31, 2025
shares
| |
| Document Information [Line Items] | |
| Document Type | 20-F |
| Amendment Flag | false |
| Document Period End Date | Dec. 31, 2025 |
| Document Fiscal Year Focus | 2025 |
| Document Fiscal Period Focus | FY |
| Entity Registrant Name | Oatly Group AB |
| Entity Central Index Key | 0001843586 |
| Entity Current Reporting Status | Yes |
| Entity Voluntary Filers | No |
| Entity Interactive Data Current | Yes |
| Current Fiscal Year End Date | --12-31 |
| Entity Filer Category | Accelerated Filer |
| Entity Well-known Seasoned Issuer | No |
| Entity Common Stock, Shares Outstanding | 624,500,001 |
| Entity Shell Company | false |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-40401 |
| Entity Incorporation, State or Country Code | V7 |
| Contact Personnel Email Address | investors@oatly.com |
| Entity Address, Address Line One | Ångfärjekajen 8 |
| Entity Address, Postal Zip Code | 211 19 |
| Entity Address, City or Town | Malmö |
| Entity Address, Country | SE |
| ICFR Auditor Attestation Flag | true |
| Document Financial Statement Error Correction [Flag] | false |
| Document Annual Report | true |
| Document Transition Report | false |
| Document Shell Company Report | false |
| Document Registration Statement | false |
| Document Accounting Standard | International Financial Reporting Standards |
| Auditor Firm ID | 1433 |
| Auditor Name | Ernst & Young AB |
| Auditor Location | Stockholm, Sweden |
| Auditor Opinion [Text Block] | Opinion on the Financial Statements
We have audited the accompanying consolidated statement of financial position of Oatly Group AB (the Company) as of December 31, 2025 and 2024, the related consolidated statement of operations, comprehensive loss, changes in equity and cash flows for each of the three years in the period ended December 31, 2025, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2025, in conformity with IFRS Accounting Standards as issued by the International Accounting Standards Board. We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated March 13, 2026, expressed an unqualified opinion thereon. |
| American Depositary Shares | |
| Document Information [Line Items] | |
| Trading Symbol | OTLY |
| Title of 12(b) Security | American Depositary Shares, each representingtwenty ordinary shares |
| Security Exchange Name | NASDAQ |
| Ordinary Shares | |
| Document Information [Line Items] | |
| No Trading Symbol Flag | true |
| Title of 12(b) Security | Ordinary shares, par value $0.00018 per share |
| Business Contact | |
| Document Information [Line Items] | |
| Contact Personnel Name | Marie-José David |
| Entity Address, Address Line One | Ångfärjekajen 8 |
| Entity Address, Postal Zip Code | 211 19 |
| Entity Address, City or Town | Malmö |
| Entity Address, Country | SE |
| City Area Code | +46 418 |
| Local Phone Number | 47 55 00 |