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Capital and funding - Summary of Share Capital (Details) - Unilever PLC
€ in Millions, £ in Millions
 11 Months Ended
Nov. 28, 2020
€ / £
Dec. 31, 2022
GBP (£)
shares
Dec. 31, 2022
EUR (€)
shares
Dec. 31, 2021
GBP (£)
shares
Dec. 31, 2021
EUR (€)
shares
Disclosure of classes of share capital [line items]          
Issued, called up and fully paid | €     € 91   € 92
Conversion rate for ordinary shares nominal value (in euro per GBP) | € / £ 1.121        
PLC ordinary shares          
Disclosure of classes of share capital [line items]          
Issued, called up and fully paid | £   £ 81.8   £ 81.8  
Number of shares issued (in shares) | shares   2,629,243,772 2,629,243,772 2,629,243,772,000,000 2,629,243,772,000,000