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Dividends on Ordinary Capital - Summary of Dividends on Ordinary Capital (Detail) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of Dividends [Line Items]      
Dividend on ordinary capital during the year € (3,916) € (3,600) € (3,404)
Unilever N.V. [member]      
Disclosure of Dividends [Line Items]      
Dividend on ordinary capital during the year (2,154) (1,974) (1,862)
Unilever PLC [member]      
Disclosure of Dividends [Line Items]      
Dividend on ordinary capital during the year € (1,762) € (1,626) € (1,542)