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Capital and funding - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Unilever PLC [member]
Disclosure of classes of share capital [Line Items]
Number of shares acquired	53,359,284	2,268,600
Number of treasury shares held	84,463,561	33,241,009
Unilever PLC [member] | Share based compensation [member]
Disclosure of classes of share capital [Line Items]
Number of treasury shares held	6,074,283
Unilever PLC [member] | Deferred stock [member]
Disclosure of classes of share capital [Line Items]
Dividend per annum	6.00%	6.00%
Unilever N.V. [member] | Ordinary Shares [member]
Disclosure of classes of share capital [Line Items]
Number of shares acquired	53,003,099	3,902,584
Number of treasury shares held	201,538,909	151,953,411
Unilever N.V. [member] | Ordinary Shares [member] | Share based compensation [member]
Disclosure of classes of share capital [Line Items]
Number of treasury shares held	9,728,181

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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- Definition

The number of shares in the entity held by the entity or by its subsidiaries or associates. [Refer: Associates [member]; Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2016-01-13
-Paragraph 79
-Subparagraph a
-Clause vi
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_79_a_vi&doctype=Standard
-URIDate 2016-03-31

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- Definition

Number of shares acquired during the period

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