XML 190 R153.htm IDEA: XBRL DOCUMENT
v3.19.1

Financial Instruments Fair Value Risk - Summary of Reconciliation of Movements in Level 3 Valuations (Detail) - Fair value [member] - Level 3 fair value measurements of financial assets and financial liabilities [member] - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure of Fair Value Measurement of Assets [Line Items] |  |
Assets and liabilities beginning balance | € (101) | € (106)
Gains and losses recognised in profit and loss | 272 | 26
Gains and losses recognised in other comprehensive income | (9) | 2
Purchases and new issues | 4 | (89)
Sales and settlements | 75 | (17)
Transfers into Level 3 |  | 83
Assets and liabilities ending balance | € 241 | € (101)

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfFairValueMeasurementOfAssetsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financial assets and financial liabilities at fair value. + References No definition available. + Details
Name: | ul_FinancialAssetsAndFinancialLiabilitiesAtFairValue
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Gains (losses) recognised in other comprehensive income, fair value measurement, Assets Liabilities. + References No definition available. + Details
Name: | ul_GainsLossesRecognisedInOtherComprehensiveIncomeFairValueMeasurementAssetsLiabilities
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Gains (losses) recognised in profit or loss, fair value measurement, assets and liabilities. + References No definition available. + Details
Name: | ul_GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssetsAndLiabilities
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Purchases and new issues, fair value measurement, assets and liabilities. + References No definition available. + Details
Name: | ul_PurchasesAndNewIssuesFairValueMeasurementAssetsAndLiabilities
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Sales and Settlements, fair value measurement, assets and liabilities. + References No definition available. + Details
Name: | ul_SalesAndSettlementsFairValueMeasurementAssetsAndLiabilities
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Transfers into Level3 of fair value hierarchy, assets (liabilities) + References No definition available. + Details
Name: | ul_TransfersIntoLevel3OfFairValueHierarchyAssetsLiabilities
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_MeasurementAxis=ifrs-full_AtFairValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ul_LevelFairValueMeasurementsOfFinancialAssetsAndFinancialLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |