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Financial Instruments Fair Value Risk - Additional Information (Detail) - EUR (€) € in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of Detailed Information about Financial Instruments [Line Items] |  |  |
Assets | € 60,285 | € 56,429 |
De-recognised asset | 36 | 43 | € 41
Proceed from disposal | 45 |  |
Profit (loss) on disposal of investment | 9 |  |
Unlisted investments include of investment | 32 | 36 |
Level 3 [Member] |  |  |
Disclosure of Detailed Information about Financial Instruments [Line Items] |  |  |
Impact in income statement due to Level 3 instruments | 26 | 94 |
Level 3 [Member] | Unilever Ventures companies [Member] |  |  |
Disclosure of Detailed Information about Financial Instruments [Line Items] |  |  |
Unlisted investments include of investment | 195 | 172 |
Level 3 [Member] | Split-Dollar Life Insurance [Member] | Fair value [Member] |  |  |
Disclosure of Detailed Information about Financial Instruments [Line Items] |  |  |
Assets | € 22 | € 25 |

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