v3.26.1
Document and Entity Information
6 Months Ended
Jun. 30, 2026
Cover [Abstract]  
Document Type 6-K
Amendment Flag false
Document Period End Date Jun. 30, 2026
Current Fiscal Year End Date --12-31
Entity Central Index Key 0001843586
Entity Registrant Name Oatly Group AB (publ)
Entity File Number 001-40401
Entity Address, Address Line One Ångfärjekajen 8
Entity Address, Postal Zip Code 211 19
Entity Address, City or Town Malmö
Entity Address, Country SE