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Dividends - Summary of Dividends on Ordinary Capital (Detail) - Unilever PLC [member] | Jun. 30, 2021 £ / shares | Jun. 30, 2021 € / shares | Jun. 30, 2021 $ / shares | Mar. 31, 2021 £ / shares | Mar. 31, 2021 € / shares | Mar. 31, 2021 $ / shares
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Ordinary Shares [member] | Traded On The London Stock Exchange [member] |  |  |  |  |  |
Disclosure of Dividends [Line Items] |  |  |  |  |  |
Dividend per share | £ / shares | £ 0.3693 |  |  | £ 0.3710 |  |
Ordinary Shares [member] | Traded On Euronext In Amsterdam [member] |  |  |  |  |  |
Disclosure of Dividends [Line Items] |  |  |  |  |  |
Dividend per share | € / shares |  | € 0.4268 |  |  | € 0.4268 |
American Depositary Receipts [member] |  |  |  |  |  |
Disclosure of Dividends [Line Items] |  |  |  |  |  |
Dividend per share | $ / shares |  |  | $ 0.5031 |  |  | $ 0.5159

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