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Dividends - Summary of Dividends on Ordinary Capital (Detail) | 3 Months Ended
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Jun. 30, 2018 € / shares | Jun. 30, 2018 £ / shares | Jun. 30, 2018 $ / shares | Mar. 31, 2018 € / shares | Mar. 31, 2018 £ / shares | Mar. 31, 2018 $ / shares
Unilever N.V. [member] | New York shares [member] |  |  |  |  |  |
Disclosure of Dividends [Line Items] |  |  |  |  |  |
Dividend per share |  |  | $ 0.4531 |  |  | $ 0.4789
Unilever N.V. [member] | Ordinary Shares [member] |  |  |  |  |  |
Disclosure of Dividends [Line Items] |  |  |  |  |  |
Dividend per share | € / shares | € 0.3872 |  |  | € 0.3872 |  |
Unilever PLC [member] | American Depositary Receipts [member] |  |  |  |  |  |
Disclosure of Dividends [Line Items] |  |  |  |  |  |
Dividend per share |  |  | $ 0.4531 |  |  | $ 0.4789
Unilever PLC [member] | Ordinary Shares [member] |  |  |  |  |  |
Disclosure of Dividends [Line Items] |  |  |  |  |  |
Dividend per share | £ / shares |  | £ 0.3435 |  |  | £ 0.3341 |

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