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Financial Instruments Fair Value Risk - Additional Information (Detail) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure of Detailed Information about Financial Instruments [Line Items] |  |
Assets | € 59,456 | € 60,285
Unlisted investments include of investment | 14 | 32
Level 3 [member] |  |
Disclosure of Detailed Information about Financial Instruments [Line Items] |  |
Impact in income statement due to Level 3 instruments | 272 | 26
Level 3 [member] | Unilever Ventures companies [Member] |  |
Disclosure of Detailed Information about Financial Instruments [Line Items] |  |
Unlisted investments include of investment | 254 | 195
Level 3 [member] | Split-Dollar Life Insurance [Member] | Fair value [member] |  |
Disclosure of Detailed Information about Financial Instruments [Line Items] |  |
Assets | € 17 | € 22

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