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v3.20.4

Consolidated Cash Flow Statement (Parenthetical) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 EUR (€)
Blueair [member] |
Statement 1 [Line Items] |
Non-cash credit from early settlement of contingent consideration | € 277

X
- Definition Non-cash credit from early settlement of contingent consideration. + References No definition available. + Details
Name: | ul_NoncashCreditFromEarlySettlementOfContingentConsideration
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | ul_Statement1LineItems
Namespace Prefix: | ul_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=ul_BlueairMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |