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Capital and Funding - Summary of Treasury Shares Movements (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of classes of share capital [line items]      
1 January € (703) [1] € (10,181)  
Other purchases and utilisations 220 64  
Adjustment on translation of PLC's ordinary capital [2]   (148) € (150)
31 December [1] € (483) (703)  
Unilever PLC [member]      
Disclosure of classes of share capital [line items]      
Adjustment on translation of PLC's ordinary capital   (2)  
Unilever PLC [member] | Nv [Member]      
Disclosure of classes of share capital [line items]      
Cancellation of NV and PLC shares   € 9,416  
[1] Shortly before Unification 4,523,367 NV and PLC ordinary shares, 892,155 NV NYRSs and 468,989 PLC ADSs held by NV in connection with share-based compensation plans were transferred to an employee share ownership trust at their carrying value. See note 4C for details.
[2] Prior to Unification, a conversion rate of £1 = €5.143 was used in accordance with the Equalisation Agreement, which ceased to exist as a result of Unification. The ordinary share capital of PLC is now translated using the conversion rate at 29 November 2020 of £1 = € 1.121. The difference between the conversion rates was released through Other Reserves as presented in the “Other effects of Unification” line in the Statement of Changes in Equity.