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Capital and funding - Narrative (Details) - shares
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of classes of share capital [line items]    
Number of shares acquired (in shares) 34,217,605 62,976,145
Number of ordinary shares held by other group companies in connection with share-based compensation plans (in shares) 2,727,097  
Unilever PLC    
Disclosure of classes of share capital [line items]    
Number of shares held by employee share ownership trust (in shares) 327,303  
Number of treasury shares held (in shares)   5,301,158