Corporate information	6 Months Ended
Jun. 30, 2026
Text Block1 [Abstract]
Corporate information	Note 1. Corporate Information Oatly Group AB (publ) (the “Company” or the “parent”) is a public limited company incorporated and domiciled in Sweden. The Company’s registered office is located at Ångfärjekajen 8, Malmö, Sweden. Oatly Group AB (publ) and its subsidiaries (together, the “Group”) manufacture, distribute and sell oat-based products.

The entire disclosure for general information about financial statements.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 128
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-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 51
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_51&doctype=Standard
-URIDate 2025-03-27

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Note 1. Corporate Information