UNILEVER PLC (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line	Label	Object Class	Period Type	Balance	Report ElementName
1	1001 - Document - Document and Entity Information	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DocumentandEntityInformation
2	Implied Table	Table	*	*	implied:Table
3	Document - Document and Entity Information [Abstract]	Abstract			ul:DocumentandEntityInformationAbstract
4	Document Type	Concept (Submission Type)	For Period		dei:DocumentType
5	Amendment Flag	Concept (Yes/No)	For Period		dei:AmendmentFlag
6	Document Period End Date	Concept (Date)	For Period		dei:DocumentPeriodEndDate
7	Document Fiscal Year Focus	Concept (Year)	For Period		dei:DocumentFiscalYearFocus
8	Document Fiscal Period Focus	Concept (Fiscal Period)	For Period		dei:DocumentFiscalPeriodFocus
9	Trading Symbol	Concept (Text/String)	For Period		dei:TradingSymbol
10	Entity Registrant Name	Concept (Text/String)	For Period		dei:EntityRegistrantName
11	Entity Central Index Key	Concept (CIK Number)	For Period		dei:EntityCentralIndexKey
12	Current Fiscal Year End Date	Concept (Month/Day)	For Period		dei:CurrentFiscalYearEndDate
13	Entity Well-known Seasoned Issuer	Concept (Yes/No)	For Period		dei:EntityWellKnownSeasonedIssuer
14	Entity Current Reporting Status	Concept (Yes/No)	For Period		dei:EntityCurrentReportingStatus
15	Entity Filer Category	Concept (Filer Category)	For Period		dei:EntityFilerCategory
16	Entity Common Stock, Shares Outstanding	Concept (Shares)	As Of		dei:EntityCommonStockSharesOutstanding
17	1003 - Statement - Consolidated Income Statement	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/StatementOfComprehensiveIncomeProfitOrLossByFunctionOfExpense-310000
18	Implied Table	Table	*	*	implied:Table
19	Profit or loss [abstract]	Abstract			ifrs-full:IncomeStatementAbstract
20	Turnover	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
21	Operating profit	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromOperatingActivities
22	After (charging)/crediting non-underlying items	Concept (Monetary)	For Period	Credit	ul:AfterChargingCreditingNonUnderlyingItems
23	Net finance costs	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncomeCost
24	Finance income	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncome
25	Finance costs	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
26	Pensions and similar obligations	Concept (Monetary)	For Period	Debit	ul:InterestOnPensionAndOtherSimilarObligations
27	Net finance cost non-underlying items	Concept (Monetary)	For Period	Debit	ul:NetFinanceCostNonunderlyingItems
28	Net monetary gain/(loss) arising from hyperinflationary economies	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnNetMonetaryPosition
29	Share of net profit/(loss) of joint ventures and associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
30	After crediting non-underlying items	Concept (Monetary)	For Period	Credit	ul:AfterCreditingNonunderlyingItemsInShareOfProfitLossOfJVsAndAssociates
31	Other income/(loss) from non-current investments and associates	Concept (Monetary)	For Period	Credit	ul:OtherIncomeLossFromNoncurrentInvestmentsAndAssociates
32	Profit before taxation	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
33	Taxation	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
34	After (charging)/crediting tax impact of non-underlying items	Concept (Monetary)	For Period	Debit	ul:AfterChargingCreditingTaxImpactOfNonunderlyingItems
35	Net profit	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
36	Attributable to:	Abstract			ifrs-full:ProfitLossAttributableToAbstract
37	Non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToNoncontrollingInterests
38	Shareholders' equity	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
39	Combined earnings per share	Abstract			ifrs-full:EarningsPerShareAbstract
40	Basic earnings per share (�)	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
41	Diluted earnings per share (�)	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShare
42	1004 - Statement - Consolidated Statement of Comprehensive Income	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/StatementOfComprehensiveIncomeOCIComponentsPresentedNetOfTax-410000
43	Implied Table	Table	*	*	implied:Table
44	Statement of comprehensive income [abstract]	Abstract			ifrs-full:StatementOfComprehensiveIncomeAbstract
45	Net profit	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
46	Other comprehensive income	Abstract			ifrs-full:OtherComprehensiveIncomeAbstract
47	Items that will not be reclassified to profit or loss, net of tax:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
48	Gains/(losses) on equity instruments measured at fair value through other comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments
49	Remeasurement of defined benefit pension plans	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
50	Items that may be reclassified subsequently to profit or loss, net of tax:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
51	Gains/(losses) on cash flow hedges	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxCashFlowHedges
52	Currency retranslation gains/(losses)	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
53	Fair value gains/(losses) on financial instruments	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
54	Total comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
55	Attributable to:	Abstract			ifrs-full:ComprehensiveIncomeAttributableToAbstract
56	Non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
57	Shareholders' equity	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
58	1005 - Statement - Consolidated Statement of Changes in Equity	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/StatementOfChangesInEquity-610000
59	Statement of changes in equity [table]	Table	*	*	ifrs-full:StatementOfChangesInEquityTable
60	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
61	Equity [member]	Member			ifrs-full:EquityMember
62	Called up share capital [member]	Member			ifrs-full:IssuedCapitalMember
63	Share Premium Account [member]	Member			ifrs-full:SharePremiumMember
64	Other reserves [member]	Member			ifrs-full:OtherReservesMember
65	Retained profit [member]	Member			ifrs-full:RetainedEarningsMember
66	Equity Attributable to Owners of Parent [member]	Member			ifrs-full:EquityAttributableToOwnersOfParentMember
67	Non-controlling Interests [member]	Member			ifrs-full:NoncontrollingInterestsMember
68	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
69	Currently stated [member]	Member			ifrs-full:RestatedMember
70	After Restatement [member]	Member			ul:AfterRestatementMember
71	Statement of changes in equity [line items]	LineItems			ifrs-full:StatementOfChangesInEquityLineItems
72	Beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
73	Profit or loss for the period	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
74	Other comprehensive income net of tax:	Abstract			ifrs-full:OtherComprehensiveIncomeAbstract
75	Fair value gains/(losses) on financial instruments	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax
76	Equity instruments	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments
77	Cash flow hedges	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxCashFlowHedges
78	Remeasurement of defined benefit pension plans net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
79	Currency retranslation gains/(losses)	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
80	Total comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
81	Dividends on ordinary capital	Concept (Monetary)	For Period	Debit	ul:DividendDistributed
82	Repurchase of shares	Concept (Monetary)	For Period	Credit	ul:RepurchaseOfShares
83	Cancellation of treasury shares	Concept (Monetary)	For Period	Credit	ifrs-full:CancellationOfTreasuryShares
84	Other movements in treasury shares	Concept (Monetary)	For Period	Credit	ul:IncreaseDecreaseThroughOtherTreasuryShareTransactionsEquity
85	Share-based payment credit	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
86	Dividends paid to non-controlling interests	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsRecognisedAsDistributionsToNoncontrollingInterests
87	Currency retranslation gains/(losses) net of tax	Concept (Monetary)	For Period	Credit	ul:AdjustmentToSharePremiumAccountCurrencyRetranslationGainsLosses
88	Hedging gain/(loss) transferred to non-financial assets	Concept (Monetary)	For Period	Credit	ul:HedgingGainLossTransferredToNonfinancialAssets
89	Other movements in equity	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity
90	Ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
91	Hyperinflation restatement at beginning of year	Concept (Monetary)	For Period	Credit	ul:HyperinflationaryOpeningBalanceRestatementRetainedProfit
92	1006 - Statement - Consolidated Statement of Changes in Equity (Parenthetical)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/StatementOfChangesInEquity-610000Parenthetical
93	Implied Table	Table	*	*	implied:Table
94	Statement of changes in equity [abstract]	Abstract			ifrs-full:StatementOfChangesInEquityAbstract
95	Number of PLC shares cancelled	Concept (Shares)	For Period		ul:CancelledShares
96	Premium paid for purchase of non-controlling interest in Unilever South Africa Remgro	Concept (Monetary)	For Period	Debit	ul:PremiumPaidForPurchaseOfNoncontrollingInterest
97	1007 - Statement - Consolidated Balance Sheet	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/StatementOfFinancialPositionCurrentNonCurrent-210000
98	Implied Table	Table	*	*	implied:Table
99	Statement of financial position [abstract]	Abstract			ifrs-full:StatementOfFinancialPositionAbstract
100	Assets	Abstract			ifrs-full:AssetsAbstract
101	Non-current assets	Abstract			ifrs-full:NoncurrentAssetsAbstract
102	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
103	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsOtherThanGoodwill
104	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
105	Pension asset for funded schemes in surplus	Concept (Monetary)	As Of	Debit	ifrs-full:RecognisedAssetsDefinedBenefitPlan
106	Deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
107	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentFinancialAssets
108	Other non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentAssets
109	Total non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
110	Current assets	Abstract			ifrs-full:CurrentAssetsAbstract
111	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
112	Trade and other current receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivables
113	Current tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTaxAssetsCurrent
114	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
115	Other financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentFinancialAssets
116	Assets held for sale	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners
117	Current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
118	Total assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
119	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
120	Current liabilities	Abstract			ifrs-full:CurrentLiabilitiesAbstract
121	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentFinancialLiabilities
122	Trade payables and other current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
123	Current tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentTaxLiabilitiesCurrent
124	Provisions	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentProvisions
125	Liabilities held for sale	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale
126	Total current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
127	Non-current liabilities	Abstract			ifrs-full:NoncurrentLiabilitiesAbstract
128	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentFinancialLiabilities
129	Non-current tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentTaxLiabilitiesNoncurrent
130	Pensions and post-retirement healthcare liabilities:	Abstract			ifrs-full:NoncurrentProvisionsAbstract
131	Funded schemes in deficit	Concept (Monetary)	As Of	Credit	ul:FundedBenefitObligation
132	Unfunded schemes	Concept (Monetary)	As Of	Credit	ul:UnfundedBenefitObligation
133	Provisions	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentProvisions
134	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
135	Other non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentLiabilities
136	Total non current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
137	Total liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
138	Shareholders' equity	Abstract			ifrs-full:EquityAbstract
139	Called up share capital	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
140	Share premium account	Concept (Monetary)	As Of	Credit	ifrs-full:SharePremium
141	Other reserves	Concept (Monetary)	As Of	Credit	ifrs-full:OtherReserves
142	Retained profit	Concept (Monetary)	As Of	Credit	ifrs-full:RetainedEarnings
143	Total equity attributable to owners of parent	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAttributableToOwnersOfParent
144	Non-controlling interests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
145	Total equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
146	Total liabilities and equity	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAndLiabilities
147	1008 - Statement - Consolidated Cash Flow Statement	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/StatementOfCashFlowsDirectMethod-510000
148	Implied Table	Table	*	*	implied:Table
149	Statement of cash flows [abstract]	Abstract			ifrs-full:StatementOfCashFlowsAbstract
150	Net profit	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
151	Taxation	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncomeTaxExpense
152	Share of net profit of joint ventures/associates and other income/(loss) from non-current investments and associates	Concept (Monetary)	For Period	Credit	ul:AdjustmentsForShareOfNetProfitOnJointVenturesOrAssociatesAndOtherIncomeLossFromNonCurrentInvestmentsAndAssociates
153	Net monetary gain arising from hyperinflationary economies	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnNetMonetaryPosition
154	Net finance costs	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForFinanceIncomeCost
155	Operating profit	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromOperatingActivities
156	Depreciation, amortisation and impairment	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
157	Changes in working capital:	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseInWorkingCapital
158	Inventories	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
159	Trade and other receivables	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
160	Trade payables and other liabilities	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
161	Pensions and similar obligations less payments	Concept (Monetary)	For Period	Debit	ul:AdjustmentsForPensionsAndSimilarObligationsNet
162	Provisions less payments	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForProvisions
163	Elimination of (profits)/losses on disposals	Concept (Monetary)	For Period	Debit	ul:AdjustmentsForLossesGainsOnPropertyPlantAndEquipmentDisposalAndBusinessDisposal
164	Non-cash charge for share-based compensation	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForSharebasedPayments
165	Other adjustments	Concept (Monetary)	For Period	Debit	ifrs-full:OtherAdjustmentsToReconcileProfitLoss
166	Cash flow from operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperations
167	Income tax paid	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities
168	Net cash flow from operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
169	Interest received	Concept (Monetary)	For Period	Debit	ifrs-full:InterestReceivedClassifiedAsInvestingActivities
170	Purchase of intangible assets	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
171	Purchase of property, plant and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
172	Disposal of property, plant and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
173	Acquisition of group companies, joint ventures and associates	Concept (Monetary)	For Period	Credit	ul:PurchaseOfInterestsInGroupCompaniesJointVenturesAndAssociates
174	Disposal of group companies, joint ventures and associates	Concept (Monetary)	For Period	Debit	ul:ProceedsFromSalesOfInterestsInGroupCompaniesJointVenturesAndAssociates
175	Acquisition of other non-current investments	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities
176	Disposal of other non-current investments	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromOtherLongtermAssetsClassifiedAsInvestingActivities
177	Dividends from joint ventures, associates and other non-current investments	Concept (Monetary)	For Period	Debit	ul:DividendsReceivedFromJointVenturesAssociatesAndOtherNonCurrentInvestmentsClassifiedAsInvestingActivities
178	(Purchase)/sale of financial assets	Concept (Monetary)	For Period	Credit	ul:PaymentsAndProceedsFromFinancialAssets
179	Net cash flow (used in)/from investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivities
180	Dividends paid on ordinary share capital	Concept (Monetary)	For Period	Credit	ifrs-full:DividendsPaidToEquityHoldersOfParentClassifiedAsFinancingActivities
181	Interest and preference dividends paid	Concept (Monetary)	For Period	Credit	ul:InterestAndPreferenceDividendsPaid
182	Net change in short-term borrowings	Concept (Monetary)	For Period	Debit	ul:CashFlowsFromUsedInIncreaseDecreaseInShortTermBorrowingsOfBankLoansBondAndOtherLoans
183	Additional financial liabilities	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
184	Repayment of financial liabilities	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
185	Capital element of finance lease rental payments	Concept (Monetary)	For Period	Credit	ifrs-full:PaymentsOfFinanceLeaseLiabilitiesClassifiedAsFinancingActivities
186	Buyback of preference shares	Concept (Monetary)	For Period	Credit	ul:BuyBackOfPreferredShares
187	Repurchase of shares	Concept (Monetary)	For Period	Credit	ul:CashPaidForRepurchaseOfSharesProgramme
188	Other movements on treasury shares	Concept (Monetary)	For Period	Debit	ul:OtherMovementsOnTreasuryShares
189	Other financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities
190	Net cash flow (used in)/from financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivities
191	Net increase/(decrease) in cash and cash equivalents	Concept (Monetary)	For Period	Debit	ul:NetIncreaseDecreaseInCashAndCashEquivalents
192	Cash and cash equivalents at beginning of year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
193	Effect of foreign exchange rate changes	Concept (Monetary)	For Period	Debit	ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
194	Cash and cash equivalents at end of year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
195	1009 - Statement - Consolidated Cash Flow Statement (Parenthetical)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/StatementOfCashFlowsDirectMethod-510000Parenthetical
196	Implied Table	Table	*	*	implied:Table
197	Statement of cash flows [abstract]	Abstract			ifrs-full:StatementOfCashFlowsAbstract
198	Non-cash credit from early settlement of contingent consideration	Concept (Monetary)	For Period	Credit	ul:CreditFromEarlySettlementOfContingentConsiderationBlueair
199	1010 - Disclosure - Accounting Information and Policies	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
200	Implied Table	Table	*	*	implied:Table
201	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
202	Accounting Information and Policies	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
203	1011 - Disclosure - Segment Information	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEntitysReportableSegmentsExplanatory
204	Implied Table	Table	*	*	implied:Table
205	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
206	Segment Information	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
207	1012 - Disclosure - Operating Costs and Non-underlying Items	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOperatingCostsAndNonUnderlyingItemsExplanatory
208	Implied Table	Table	*	*	implied:Table
209	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
210	Operating Costs and Non-underlying Items	Concept (Text Block (HTML))	For Period		ul:DisclosureOfOperatingCostsAndNonUnderlyingItemsExplanatory
211	1013 - Disclosure - Employees	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEmployeeBenefitsExplanatory
212	Implied Table	Table	*	*	implied:Table
213	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
214	Employees	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
215	1014 - Disclosure - Net Finance Costs	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinanceIncomeExpenseExplanatory
216	Implied Table	Table	*	*	implied:Table
217	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
218	Net Finance Costs	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinanceIncomeExpenseExplanatory
219	1015 - Disclosure - Taxation	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIncomeTaxExplanatory
220	Implied Table	Table	*	*	implied:Table
221	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
222	Taxation	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIncomeTaxExplanatory
223	1016 - Disclosure - Combined Earnings Per Share	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEarningsPerShareExplanatory
224	Implied Table	Table	*	*	implied:Table
225	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
226	Combined Earnings Per Share	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEarningsPerShareExplanatory
227	1017 - Disclosure - Dividends on Ordinary Capital	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfDividendsExplanatory
228	Implied Table	Table	*	*	implied:Table
229	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
230	Dividends on Ordinary Capital	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDividendsExplanatory
231	1018 - Disclosure - Goodwill and Intangible Assets	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIntangibleAssetsAndGoodwillExplanatory
232	Implied Table	Table	*	*	implied:Table
233	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
234	Goodwill and Intangible Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIntangibleAssetsAndGoodwillExplanatory
235	1019 - Disclosure - Property, Plant and Equipment	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfPropertyPlantAndEquipmentExplanatory
236	Implied Table	Table	*	*	implied:Table
237	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
238	Property, Plant and Equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
239	1020 - Disclosure - Other Non-current Assets	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherNoncurrentAssetsExplanatory
240	Implied Table	Table	*	*	implied:Table
241	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
242	Other Non-current Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherNoncurrentAssetsExplanatory
243	1021 - Disclosure - Inventories	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfInventoriesExplanatory
244	Implied Table	Table	*	*	implied:Table
245	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
246	Inventories	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInventoriesExplanatory
247	1022 - Disclosure - Trade and Other Current Receivables	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfTradeAndOtherReceivablesExplanatory
248	Implied Table	Table	*	*	implied:Table
249	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
250	Trade and Other Current Receivables	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
251	1023 - Disclosure - Trade Payables and Other Liabilities	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfTradeAndOtherPayablesExplanatory
252	Implied Table	Table	*	*	implied:Table
253	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
254	Trade Payables and Other Liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory
255	1024 - Disclosure - Capital and Funding	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfShareCapitalReservesEquityAndFinancialLiabilitiesExplanatory
256	Implied Table	Table	*	*	implied:Table
257	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
258	Capital and Funding	Concept (Text Block (HTML))	For Period		ul:DisclosureOfShareCapitalReservesEquityAndFinancialLiabilitiesExplanatory
259	1025 - Disclosure - Treasury Risk Management	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfTreasuryRiskManagementWithManagingLiquidityInterestAndMarketRiskExplanatory
260	Implied Table	Table	*	*	implied:Table
261	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
262	Treasury Risk Management	Concept (Text Block (HTML))	For Period		ul:DisclosureOfTreasuryRiskManagementWithManagingLiquidityInterestAndMarketRiskExplanatory
263	1026 - Disclosure - Investment and Return	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfInvestmentAndReturnExplanatory
264	Implied Table	Table	*	*	implied:Table
265	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
266	Investment and Return	Concept (Text Block (HTML))	For Period		ul:DisclosureOfInvestmentAndReturnExplanatory
267	1027 - Disclosure - Financial Instruments Fair Value Risk	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFairValueMeasurementExplanatory
268	Implied Table	Table	*	*	implied:Table
269	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
270	Financial Instruments Fair Value Risk	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFairValueMeasurementExplanatory
271	1028 - Disclosure - Provisions	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfProvisionsExplanatory
272	Implied Table	Table	*	*	implied:Table
273	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
274	Provisions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfProvisionsExplanatory
275	1029 - Disclosure - Commitments and Contingent Liabilities	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
276	Implied Table	Table	*	*	implied:Table
277	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
278	Commitments and Contingent Liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
279	1030 - Disclosure - Acquisitions and Disposals	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfAcquisitionsAndDisposalsExplanatory
280	Implied Table	Table	*	*	implied:Table
281	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
282	Acquisitions and Disposals	Concept (Text Block (HTML))	For Period		ul:DisclosureOfAcquisitionsAndDisposalsExplanatory
283	1031 - Disclosure - Assets and Liabilities Held for Sale	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfNoncurrentAssetsHeldForSaleAndDiscontinuedOperationsExplanatory
284	Implied Table	Table	*	*	implied:Table
285	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
286	Assets and Liabilities Held for Sale	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNoncurrentAssetsHeldForSaleAndDiscontinuedOperationsExplanatory
287	1032 - Disclosure - Related Party Transactions	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfRelatedPartyExplanatory
288	Implied Table	Table	*	*	implied:Table
289	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
290	Related Party Transactions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRelatedPartyExplanatory
291	1033 - Disclosure - Share Buyback	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfShareBuybackTextBlock
292	Implied Table	Table	*	*	implied:Table
293	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
294	Share Buyback	Concept (Text Block (HTML))	For Period		ul:DisclosureOfShareBuybackTextBlock
295	1034 - Disclosure - Remuneration of Auditors	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfAuditorsRemunerationExplanatory
296	Implied Table	Table	*	*	implied:Table
297	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
298	Remuneration of Auditors	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAuditorsRemunerationExplanatory
299	1035 - Disclosure - Events After The Balance Sheet Date	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEventsAfterReportingPeriodExplanatory
300	Implied Table	Table	*	*	implied:Table
301	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
302	Events After The Balance Sheet Date	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
303	1036 - Disclosure - Significant Subsidiaries	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCompositionOfGroupExplanatory
304	Implied Table	Table	*	*	implied:Table
305	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
306	Significant Subsidiaries	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCompositionOfGroupExplanatory
307	1037 - Disclosure - Guarantor Statements	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfGuarantorStatementsExplanatory
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311	1038 - Disclosure - Accounting Information and Policies (Policies)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSummaryOfSignificantAccountingPoliciesExplanatoryPolicies
312	Implied Table	Table	*	*	implied:Table
313	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
314	UNILEVER	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForGroupExplanatory
315	BASIS OF CONSOLIDATION	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForBasisOfConsolidationExplanatory
316	COMPANIES LEGISLATION AND ACCOUNTING STANDARDS	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForCompaniesLegislationandAccountingStandardsExplanatory
317	ACCOUNTING POLICIES	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfOtherAccountingPoliciesRelevantToUnderstandingOfFinancialStatements
318	FOREIGN CURRENCIES	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
319	CLASSIFICATION OF ARGENTINA AS A HYPER-INFLATIONARY ECONOMY	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForHyperinflationaryEconomicEnvironmentsExplanatory
320	CRITICAL ACCOUNTING ESTIMATES AND JUDGEMENTS	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForCriticalAccountingEstimatesAndJudgementsExplanatory
321	RECENT ACCOUNTING DEVELOPMENTS ADOPTED BY THE GROUP	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForRecentAccountingDevelopmentExplanatory
322	SEGMENT INFORMATION	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
323	OPERATING COSTS AND NON-UNDERLYING ITEMS	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForOperatingCostsAndNonUnderlyingItemsExplanatory
324	PENSIONS AND SIMILAR OBLIGATIONS	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
325	SHARE-BASED COMPENSATION PLANS	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
326	NET FINANCE COSTS	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinanceCostsExplanatory
327	INCOME TAX	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
328	DEFERRED TAX	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory
329	TAX ON OTHER COMPREHENSIVE INCOME	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForIncomeTaxOnOtherComprehensiveIncomeExplanatory
330	COMBINED EARNINGS PER SHARE	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
331	DIVIDENDS ON ORDINARY CAPITAL	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForDividendsExplanatory
332	GOODWILL	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForGoodwillExplanatory
333	INTANGIBLE ASSETS	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory
334	PROPERTY, PLANT AND EQUIPMENT	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
335	OTHER NON-CURRENT ASSETS	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForOtherNoncurrentAssetsExplanatory
336	INVENTORIES	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
337	TRADE AND OTHER CURRENT RECEIVABLES	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory
338	TRADE PAYABLES AND OTHER LIABILITIES	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory
339	ORDINARY SHARES	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForOrdinarySharesExplanatory
340	INTERNAL HOLDINGS	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForInternalHoldingsExplanatory
341	SHARE-BASED COMPENSATION	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForShareBasedCompensationPlansExplanatory
342	OTHER RESERVES	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForOtherReservesExplanatory
343	SHARES HELD BY EMPLOYEE SHARE TRUSTS AND GROUP COMPANIES	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForSharesHeldByEmployeeShareTrustsAndGroupCompaniesExplanatory
344	FINANCIAL LIABILITIES	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory
345	DERIVATIVES AND HEDGE ACCOUNTING	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsAndHedgingExplanatory
346	CASH AND CASH EQUIVALENTS	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForCashAndCashEquivalentsExplanatory
347	OTHER FINANCIAL ASSETS	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForOtherFinancialAssetsExplanatory
348	Debt instruments	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForDebtInstrumentsExplanatory
349	Equity instruments	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForEquityInstrumentsExplanatory
350	IMPAIRMENT OF FINANCIAL ASSETS	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory
351	PROVISIONS	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
352	COMMITMENTS AND CONTINGENT LIABILITIES	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForCommitmentsAndContingentLiabilitiesExplanatory
353	ACQUISITIONS AND DISPOSALS	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForAcquisitionsAndDisposalsExplanatory
354	ASSETS AND LIABILITIES HELD FOR SALE	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForAssetsAndLiabilitiesClassifiedAsHeldForSaleExplanatory
355	RELATED PARTY TRANSACTIONS	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForTransactionsWithRelatedPartiesExplanatory
356	EVENTS AFTER THE BALANCE SHEET DATE	Concept (Text Block (HTML))	For Period		ul:DescriptionOfAccountingPolicyForEventsAfterReportingPeriodExplanatory
357	1039 - Disclosure - Segment Information (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEntitysReportableSegmentsExplanatoryTables
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360	Summary of Operating Results of Reportable Segments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOperatingSegmentsExplanatory
361	Summary of Operating Results by Geographical Areas	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfGeographicalAreasExplanatory
362	Summary of Additional Information by Geographies	Concept (Text Block (HTML))	For Period		ul:DisclosureOfAdditionalInformationByGeographiesExplanatory
363	1040 - Disclosure - Operating Costs and Non-underlying Items (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOperatingCostsAndNonUnderlyingItemsExplanatoryTables
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366	Gross Profit and Operating Cost	Concept (Text Block (HTML))	For Period		ul:DisclosureOfGrossProfitAndOperatingCostExplanatory
367	Non-underlying Items	Concept (Text Block (HTML))	For Period		ul:DisclosureOfSummaryOfNonUnderlyingItemsExplanatory
368	Other Significant Cost	Concept (Text Block (HTML))	For Period		ul:DisclosureOfOtherSignificantCostsExplanatory
369	1041 - Disclosure - Employees (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEmployeeBenefitsExplanatoryTables
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372	Summary of Staff Cost, Average Number of Employees and Key Management Compensation	Concept (Text Block (HTML))	For Period		ul:DisclosureOfStaffAndManagementCostsExplanatory
373	Summary of Assumptions, Weighted by Liabilities for Valuation of Defined Benefit Plans	Concept (Text Block (HTML))	For Period		ul:DisclosureOfActuarialAssumptionsUsedInDetermineBenefitLiabilityExplanatory
374	Summary of Charge to Operating Profit	Concept (Text Block (HTML))	For Period		ul:DisclosureOfDefinedBenefitAndDefinedContributionPensionCostsChargedToIncomeExplanatory
375	Summary of Amounts Recognised in Statement of Comprehensive Income on Remeasurement of Net Defined Benefit Liability	Concept (Text Block (HTML))	For Period		ul:DisclosureOfPensionCostsOnRemeasuresmentOfNetDefinedBenefitLiabilityIncludedInComprehensiveIncomeExplanatory
376	Summary of Assets, Liabilities and Surplus/ (Deficit) Position of Pension and Other Post-Employment Benefit Plans at Balance Sheet Date	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory
377	Summary of Movements in Assets	Concept (Text Block (HTML))	For Period		ul:DisclosureOfReconciliationOfChangeInDefinedBenefitPlanAssetExplanatory
378	Summary of Movements in Liabilities	Concept (Text Block (HTML))	For Period		ul:DisclosureOfReconciliationOfChangeInDefinedBenefitPlanLiabilityExplanatory
379	Summary of Movements in (Deficit)/Surplus	Concept (Text Block (HTML))	For Period		ul:DisclosureOfReconciliationOfChangeInDefinedBenefitPlanDeficitSurplusExplanatory
380	Summary of Principal Defined Benefit Liabilities and Split of Liabilities Between Different Categories of Plan Participants	Concept (Text Block (HTML))	For Period		ul:DisclosureOfPrincipalDefinedBenefitLiabilitiesAndSplitOfLiabilitiesBetweenDifferentCategoriesOfPlanExplanatoryTextBlock
381	Schedule of Fair Value of Plans Assets, Which Are Reported Net of Fund Liabilities That Are Not Employee Benefits	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFairValueOfPlanAssetsExplanatory
382	Schedule of Sensitivity of Pension Liabilities to Changes in the Weighted Key Assumptions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory
383	Schedule of Cash Flow in Respect of Pensions and Similar Post-employment Benefits	Concept (Text Block (HTML))	For Period		ul:DisclosureOfCashFlowInRespectOfPensionsAndSimilarPostEmploymentBenefitsExplanatory
384	Schedule of Income Statement Charge	Concept (Text Block (HTML))	For Period		ul:DisclosureOfExpenseFromShareBasedPaymentTransactionsWithEmployeesExplanatory
385	Summary of Status of Performance Share Plans, Related Changes and Share Award Value Information	Concept (Text Block (HTML))	For Period		ul:SummaryOfStatusOfPerformanceSharePlansRelatedChangesAndShareAwardValueInformationExplanatory
386	1042 - Disclosure - Net Finance Costs (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinanceIncomeExpenseExplanatoryTables
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390	1043 - Disclosure - Taxation (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIncomeTaxExplanatoryTables
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394	Summary of Reconciliation of Effective Tax Rate	Concept (Text Block (HTML))	For Period		ul:DisclosureOfReconciliationOfEffectiveTaxRateExplanatory
395	Summary of Movements in Deferred Tax Asset (Liability)	Concept (Text Block (HTML))	For Period		ul:DisclosureOfReconciliationOfChangesInDeferredTaxLiabilityAssetExplanatory
396	Summary of Deferred Tax Assets and Liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDeferredTaxesExplanatory
397	Summary of Tax Effects of Components of Other Comprehensive Income	Concept (Text Block (HTML))	For Period		ul:DisclosureOfTaxEffectsOfComponentsOfOtherComprehensiveIncomeExplanatory
398	1044 - Disclosure - Combined Earnings Per Share (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEarningsPerShareExplanatoryTables
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402	1045 - Disclosure - Dividends on Ordinary Capital (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfDividendsExplanatoryTables
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406	1046 - Disclosure - Goodwill and Intangible Assets (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIntangibleAssetsAndGoodwillExplanatoryTables
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408	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
409	Summary of Movements in Goodwill and Intangible Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory
410	Summary of Goodwill and Indefinite-life Intangible Assets Held in Significant CGUs	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesExplanatory
411	Summary of Key Assumptions Used in Discounted Cash Flow Projections	Concept (Text Block (HTML))	For Period		ul:DisclosureOfKeyAssumptionsUsedInDiscountedCashFlowProjectionsExplanatory
412	1047 - Disclosure - Property, Plant and Equipment (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfPropertyPlantAndEquipmentExplanatoryTables
413	Implied Table	Table	*	*	implied:Table
414	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
415	Summary of Movements in Property, Plant and Equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
416	1048 - Disclosure - Other Non-current Assets (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherNoncurrentAssetsExplanatoryTables
417	Implied Table	Table	*	*	implied:Table
418	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
419	Summary of Other Non-current Assets	Concept (Text Block (HTML))	For Period		ul:DisclosureOfDetailedInformationAboutOtherNoncurrentAssetsExplanatory
420	Movements in Interest in Joint Ventures and Associates	Concept (Text Block (HTML))	For Period		ul:DisclosureOfJointVenturesAndAssociatesExplanatory
421	1049 - Disclosure - Inventories (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfInventoriesExplanatoryTables
422	Implied Table	Table	*	*	implied:Table
423	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
424	Summary of Inventories	Concept (Text Block (HTML))	For Period		ul:DisclosureOfDetailedInformationAboutInventoriesExplanatory
425	1050 - Disclosure - Trade and Other Current Receivables (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfTradeAndOtherReceivablesExplanatoryTables
426	Implied Table	Table	*	*	implied:Table
427	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
428	Summary of Trade and Other Current Receivables	Concept (Text Block (HTML))	For Period		ul:DisclosureOfTradeAndOtherCurrentReceivableExplanatory
429	Summary of Ageing of Trade Receivables	Concept (Text Block (HTML))	For Period		ul:DisclosureOfDetailedInformationOfAgingAnalysisOfTradeReceivablesExplanatory
430	Summary of Impairment Provision for Trade and Other Receivables	Concept (Text Block (HTML))	For Period		ul:DisclosureOfReconciliationOfImpairmentProvisionForTradeAndOtherReceivablesCurrentAndNoncurrentImpairmentsExplanatory
431	1051 - Disclosure - Trade Payables and Other Liabilities (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfTradeAndOtherPayablesExplanatoryTables
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434	Summary of Trade Payables and Other Liabilities	Concept (Text Block (HTML))	For Period		ul:DisclosureOfDetailedInformationAboutTradeAndOtherPayablesExplanatory
435	1052 - Disclosure - Capital and Funding (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfShareCapitalReservesEquityAndFinancialLiabilitiesExplanatoryTables
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437	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
438	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
439	Bonds and Other Loans [Member]	Member			ul:BondsAndOtherLoansMember
440	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
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442	Summary Combined Financial Information in Relation to HUL	Concept (Text Block (HTML))	For Period		ul:DisclosureOfSubsidiariesWithSignificantNonControllingInterestsExplanatory
443	Summary of Consolidated Statement of Changes in Equity: Analysis of Other Reserves	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReservesAndOtherEquityInterestExplanatory
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445	Summary of Currency Retranslation Reserve	Concept (Text Block (HTML))	For Period		ul:DisclosureOfCurrencyRetranslationReserveExplanatory
446	Summary of Comprehensive Income: Other Comprehensive Income Reconciliation	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemExplanatory
447	Summary of Financial Liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialLiabilitiesExplanatory
448	Reconciliation of Liabilities Arising from Financing Activities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesExplanatory
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450	1053 - Disclosure - Treasury Risk Management (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfTreasuryRiskManagementWithManagingLiquidityInterestAndMarketRiskExplanatoryTables
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454	Summary of Derivative Cash Flow Hedges	Concept (Text Block (HTML))	For Period		ul:DisclosureOfDerivativeCashFlowHedgesExplanatory
455	Impact of Interest Rate Swaps and Cross-Currency Swaps	Concept (Text Block (HTML))	For Period		ul:DisclosureOfImpactOfInterestRateSwapsAndCrossCurrencySwapsExplanatory
456	Summary of Derivatives Used to Hedge	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutHedgesExplanatory
457	Summary of Financial Assets are Subject to Offsetting, Enforceable Master Netting Arrangements and Similar Agreements	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOffsettingOfFinancialAssetsExplanatory
458	Summary of Financial Liabilities are Subject to Offsetting, Enforceable Master Netting Arrangements and Similar Agreements	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOffsettingOfFinancialLiabilitiesExplanatory
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463	Schedule of Cash and Cash Equivalents Reconciliation to Cash Flow Statement	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
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469	Summary of Reconciliation of Movements in Level 3 Valuations	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFairValueMeasurementOfAssetsExplanatory
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474	1057 - Disclosure - Commitments and Contingent Liabilities (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCommitmentsAndContingentLiabilitiesExplanatoryTables
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478	Summary of Net Book Value of Property Plant and Equipment Under Lease Agreement	Concept (Text Block (HTML))	For Period		ul:DisclosureOfNetCarryingAmountOfPropertyPlantAndEquipmentUnderFinanceLeaseArrangementsExplanatory
479	Summary of Operating Lease and Other Commitments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsExplanatory
480	Summary of Contingent Liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfContingentLiabilitiesExplanatory
481	1058 - Disclosure - Acquisitions and Disposals (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfAcquisitionsAndDisposalsExplanatoryTables
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484	Effect of Acquisitions on Consolidated Balance Sheet	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory
485	Summary of Impact of Disposals	Concept (Text Block (HTML))	For Period		ul:DisclosureOfDetailedInformationAboutDisposalsExplanatory
486	1059 - Disclosure - Assets and Liabilities Held for Sale (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfNoncurrentAssetsHeldForSaleAndDiscontinuedOperationsExplanatoryTables
487	Implied Table	Table	*	*	implied:Table
488	Text block1 [abstract]	Abstract			ul:TextBlock1Abstract
489	Summary of Assets and Liabilities Classified as Held for Sale	Concept (Text Block (HTML))	For Period		ul:DisclosureOfAssetsAndLiabilitiesClassifiedAsHeldForSaleExplanatory
490	1060 - Disclosure - Related Party Transactions (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfRelatedPartyExplanatoryTables
491	Implied Table	Table	*	*	implied:Table
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493	Related Party Transactions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
494	1061 - Disclosure - Remuneration of Auditors (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfAuditorsRemunerationExplanatoryTables
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498	1062 - Disclosure - Significant Subsidiaries (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCompositionOfGroupExplanatoryTables
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502	1063 - Disclosure - Guarantor Statements (Tables)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfGuarantorStatementsExplanatoryTables
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506	Balance Sheet	Concept (Text Block (HTML))	For Period		ul:DisclosureOfGuarantorBalanceSheetExplanatory
507	Cash Flow	Concept (Text Block (HTML))	For Period		ul:DisclosureOfGuarantorCashFlowStatementExplanatory
508	1064 - Disclosure - Accounting Information and Policies - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureAccountingInformationAndPoliciesAdditionalInformation
509	Disclosure of summary of significant accounting policies [table]	Table	*	*	ul:DisclosureOfSummaryOfSignificantAccountingPoliciesTable
510	New IFRSs [axis]	Axis			ifrs-full:NewIFRSsAxis
511	New IFRSs [member]	Member			ifrs-full:NewIFRSsMember
512	IFRS sixteen [member]	Member			ul:IFRSSixteenMember
513	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
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516	Americas [member]	Member			us-gaap:AmericasMember
517	Asia/AMET/RUB [member]	Member			ul:AsiaAMETRUBMember
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519	Currently stated [member]	Member			ifrs-full:RestatedMember
520	Hyperinflation restatement [member]	Member			ul:HyperinflationRestatementMember
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522	Total assets	Concept (Monetary)	For Period	Debit	ul:HyperinflationaryRestatementAssets
523	Hyperinflationary adjustment, property, plant and equipment	Concept (Monetary)	For Period	Debit	ul:HyperinflationaryRestatementPropertyPlantAndEquipment
524	Increase in goodwill	Concept (Monetary)	For Period	Debit	ul:HyperinflationaryRestatementGoodwill
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526	Turnover	Concept (Monetary)	For Period	Debit	ul:HyperinflationaryAdjustmentToTurnover
527	Operating profit	Concept (Monetary)	For Period	Debit	ul:HyperinflationaryAdjustmentToOperatingProfit
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530	Estimated split in land and buildings	Concept (Monetary)	As Of	Debit	ul:ExpectedImpactToLandAndBuildingsFromAdoptionOfIFRSSixteenFromFirstJanuary2019
531	Estimated split in plant and machinery	Concept (Monetary)	As Of	Debit	ul:ExpectedImpactToPlantAndMachineryFromAdoptionOfIFRSSixteenFromFirstJanuary2019
532	Expected financial liabilities increase	Concept (Monetary)	For Period	Credit	ul:ExpectedImpactToFinancialLiabilitiesFromAdoptionOfIFRSSixteenFromFirstJanuary2019
533	Expected increase in depreciation	Concept (Monetary)	For Period	Debit	ul:ExpectedimpacttodepreciationfromadoptionofIFRSsixteenfromfirstJanuary2019
534	Reduction in operating lease expenses	Concept (Monetary)	For Period	Debit	ul:ExpectedImpactToOperatingLeaseExpensesFromAdoptionOfIFRSSixteenFromFirstJanuary2019
535	Increase in operating profit	Concept (Monetary)	For Period	Credit	ul:ExpectedImpactToOperatingProfitFromAdoptionOfIFRSSixteenFromFirstJanuary2019
536	Expected increase in finance cost	Concept (Monetary)	For Period	Credit	ul:ExpectedImpactToFinanceCostsFromAdoptionOfIfrsSixteenFromFirstJanuary2019
537	Increase cash flows from operating activities	Concept (Monetary)	For Period		ul:ExpectedImpactToCashFlowFromAdoptionofIFRSSixteenFromFirstJanuary2019
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539	Disclosure of Operating Segments [Table]	Table	*	*	ifrs-full:DisclosureOfOperatingSegmentsTable
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542	Beauty & Personal Care [member]	Member			ul:BeautyAndPersonalCareMember
543	Foods & Refreshment [member]	Member			ul:FoodsAndRefreshmentMember
544	Home Care [member]	Member			ul:HomeCareMember
545	Disclosure of Operating Segments [Line Items]	LineItems			ifrs-full:DisclosureOfOperatingSegmentsLineItems
546	Turnover	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
547	Operating profit	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromOperatingActivities
548	Non-underlying items	Concept (Monetary)	For Period	Credit	ul:IncomeExpenseNonUnderlyingItemsWithinOperatingProfitBeforeTax
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550	Share of net profit/(loss) of joint ventures and associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
551	Significant non-cash charges:	Abstract			ul:SignificantNonCashChargesAbstract
552	Significant non-cash charges within underlying operating profit:	Abstract			ul:SignificantNonCashChargesWithinUnderlyingOperatingProfitAbstract
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554	Share-based compensation and other non-cash charges	Concept (Monetary)	For Period	Debit	ul:ShareBasedCompensationAndOtherNonCashCharges
555	Significant non-cash charges within non-underlying items:	Abstract			ul:SignificantNonCashChargesWithinNonUnderlyingItemsAbstract
556	Impairment and other non-cash charges	Concept (Monetary)	For Period	Debit	ul:ImpairmentAndOtherNonCashCharges
557	1066 - Disclosure - Segment Information - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureSegmentInformationAdditionalInformation
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561	Description of turnover from other countries	Concept (Text/String)	For Period		ifrs-full:BasisForAttributingRevenuesFromExternalCustomersToIndividualCountries
562	1067 - Disclosure - Segment Information - Summary of Operating Results by Geographical Areas (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureSegmentInformationSummaryOfOperatingResultsByGeographicalAreas
563	Disclosure of geographical areas [table]	Table	*	*	ifrs-full:DisclosureOfGeographicalAreasTable
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565	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
566	Country of Domicile [Member]	Member			ifrs-full:CountryOfDomicileMember
567	United States [member]	Member			country:US
568	Others [Member]	Member			ul:OthersMember
569	Disclosure of geographical areas [line items]	LineItems			ifrs-full:DisclosureOfGeographicalAreasLineItems
570	Turnover	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
571	Non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts
572	1068 - Disclosure - Segment Information - Summary of Additional Information by Geographies (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureSegmentInformationSummaryOfAdditionalInformationByGeographies
573	Disclosure of geographical areas [table]	Table	*	*	ifrs-full:DisclosureOfGeographicalAreasTable
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575	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
576	Asia/AMET/RUB [member]	Member			ul:AsiaAfricaMiddleEastTurkeyRussiaUkraineAndBelarusMember
577	The Americas [member]	Member			ul:TheAmericasMember
578	Europe [member]	Member			us-gaap:EuropeMember
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580	Turnover	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
581	Operating profit	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromOperatingActivities
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584	Share of net profit/(loss) of joint ventures and associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
585	1069 - Disclosure - Operating Costs and Non-underlying Items - Analysis of expenses recognized in Profit or loss by function (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureOperatingCostsAndNonunderlyingItemsAnalysisOfExpensesRecognizedInProfitOrLossByFunction
586	Analysis of expenses recognized in profit or loss by function [Table]	Table	*	*	ul:AnalysisOfExpensesRecognizedInProfitOrLossByFunctionTable
587	Income Statement Location [Axis]	Axis			ul:IncomeStatementLocation1Axis
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589	Cost of Sales [Member]	Member			ul:CostOfSales1Member
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591	Analysis of expenses recognized in profit or loss by function [Line Items]	LineItems			ul:AnalysisOfExpensesRecognizedInProfitOrLossByFunctionLineItems
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593	Cost of sales	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfSales
594	Distribution costs	Concept (Monetary)	For Period	Debit	ifrs-full:DistributionCosts
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596	Selling and administrative expenses	Concept (Monetary)	For Period	Debit	ifrs-full:SellingGeneralAndAdministrativeExpense
597	Brand and marketing investment	Concept (Monetary)	For Period	Debit	ifrs-full:SalesAndMarketingExpense
598	Research and development	Concept (Monetary)	For Period	Debit	ifrs-full:ResearchAndDevelopmentExpense
599	Operating profit	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromOperatingActivities
600	1070 - Disclosure - Operating Costs and Non-underlying Items - Summary of Non-underlying Items Related to Gross Profit and Operating Costs (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureOperatingCostsAndNonunderlyingItemsSummaryOfNonunderlyingItemsRelatedToGrossProfitAndOperatingCosts
601	Implied Table	Table	*	*	implied:Table
602	Disclosure of non underlying items [Abstract]	Abstract			ul:DisclosureOfNonUnderlyingItemsAbstract
603	Non-underlying items within operating profit before tax	Concept (Monetary)	For Period	Credit	ul:IncomeExpenseNonUnderlyingItemsWithinOperatingProfitBeforeTax
604	Acquisition and disposal-related costs	Concept (Monetary)	For Period	Debit	ul:AcquisitionAndDisposalRelatedCosts
605	Gain/(loss) on disposal of group companies	Concept (Monetary)	For Period	Credit	ul:GainLossOnDisposalOfGroupCompanies
606	Restructuring costs	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseOfRestructuringActivities
607	Impairments and other one-off items	Concept (Monetary)	For Period	Debit	ul:ImpairmentsAndOtherOneoffItems
608	Tax on non-underlying items within operating profit	Concept (Monetary)	For Period	Debit	ul:TaxChargeCreditOnNonUnderlyingItemsWithinOperatingProfit
609	Non-underlying items within operating profit after tax	Concept (Monetary)	For Period	Credit	ul:IncomeExpenseNonUnderlyingItemsWithinOperatingProfitAfterTax
610	Non-underlying items not in operating profit but within net profit before tax	Concept (Monetary)	For Period	Debit	ul:NonUnderlyingItemsNotInOperatingProfitButWithinNetProfitBeforeTax
611	Premium paid on buyback of preference shares	Concept (Monetary)	For Period	Debit	ul:PremiumPaidOnBuyBackOfPreferenceShares
612	Share of gain on disposal of Spreads business in Portugal JV	Concept (Monetary)	For Period	Debit	ul:ShareOfGainOnDisposalOfSpreadsBusinessInJV
613	Net monetary gain arising from hyperinflationary economies	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnNetMonetaryPosition
614	Tax impact of non-underlying items not in operating profit but within net profit	Concept (Monetary)	For Period	Debit	ul:TaxChargeCreditOnNonUnderlyingItemsOutsideOperatingProfitButWithinNetProfit
615	Tax on premium paid on buyback of preference shares (non deductible)	Concept (Monetary)	For Period	Debit	ul:TaxOnPremiumPaidOnBuyBackOfPreferenceSharesNonDeductible
616	Impact of US tax reform	Concept (Monetary)	For Period	Debit	ul:TaxExpenseBenefitDueToChangeInUSATaxRates
617	Non-underlying items not in operating profit but within net profit after tax	Concept (Monetary)	For Period	Credit	ul:IncomeExpenseNonUnderlyingItemsNotInOperatingProfitButWithinNetProfitAfterTax
618	Non-underlying items after tax	Concept (Monetary)	For Period	Credit	ul:NonUnderlyingIncomeOrExpenseAfterTax
619	Attributable to:	Abstract			ul:NonUnderlyingChargesAndCreditsAfterTaxAttributableToAbstract
620	Non-controlling interest	Concept (Monetary)	For Period	Credit	ul:NonUnderlyingIncomeOrExpenseAfterTaxAttributableToNonControllingInterest
621	Shareholders' equity	Concept (Monetary)	For Period	Credit	ul:NonUnderlyingIncomeOrExpenseAfterTaxAttributableToParent
622	1071 - Disclosure - Operating Costs and Non-underlying Items - Summary of Non-underlying Items Related to Gross Profit and Operating Costs (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureOperatingCostsAndNonunderlyingItemsSummaryOfNonunderlyingItemsRelatedToGrossProfitAndOperatingCostsParenthetical
623	Disclosure of Acquisitions and Disposals [Table]	Table	*	*	ul:DisclosureOfAcquisitionsAndDisposalsTable
624	Country Name [Axis]	Axis			ul:CountryNameAxis
625	Country Name [Domain]	Member			ul:CountryNameDomain
626	Argentina [member]	Member			country:AR
627	United Kingdom [Member]	Member			country:GB
628	Litigation Case 1 [Axis]	Axis			ul:LitigationCase1Axis
629	Litigation Case [Domain]	Member			ul:LitigationCaseDomain
630	Legal Cases in Relation to Investigations [Member]	Member			ul:LegalCasesInRelationToInvestigationsMember
631	Retirement Benefit Plans Type [Axis]	Axis			ul:RetirementBenefitPlansTypeAxis
632	Retirement benefit plans type [member]	Member			ul:RetirementBenefitPlansTypeMember
633	Pension obligation [member]	Member			ul:PensionObligationMember
634	Non-underlying Items [Line Items]	LineItems			ul:NonUnderlyingItemsLineItems
635	Credit from early settlement of contingent consideration	Concept (Monetary)	For Period	Credit	ul:CreditFromEarlySettlementOfContingentConsiderationBlueair
636	Gain on business disposal	Concept (Monetary)	For Period	Debit	ul:GainOnBusinessDisposal
637	Impairment of intangible asset	Concept (Monetary)	For Period	Debit	ul:ImpairmentOfIntangibleAssetBlueair
638	Litigation charges	Concept (Monetary)	For Period	Debit	ul:LitigationChargesNonunderlying
639	Foreign exchange losses resulting from remeasurement	Concept (Monetary)	For Period	Debit	ul:ForeignExchangeLossesResultingFromRemeasurement
640	Tax benefit recognized due to Tax Cuts and Jobs Act	Concept (Monetary)	For Period	Debit	ul:TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit
641	New US tax rate	Concept (Percent)	For Period		ul:NewUsTaxRate
642	1072 - Disclosure - Operating Costs and Non-underlying Items - Summary of Other Operating Income Expense (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureOperatingCostsAndNonunderlyingItemsSummaryOfOtherOperatingIncomeExpense
643	Disclosure Of Other Income (Expense) [Table]	Table	*	*	ul:DisclosureOfOtherIncomeExpenseTable
644	Type Of Exchange Gain Loss [Axis]	Axis			ul:TypeOfExchangeGainLossAxis
645	Type Of Exchange Gain Loss [Domain]	Member			ul:TypeOfExchangeGainLossDomain
646	On Underlying Transactions [Member]	Member			ul:OnUnderlyingTransactionsMember
647	On Covering Forward Contracts [Member]	Member			ul:OnCoveringForwardContractsMember
648	Disclosure of gross profit and operating costs [line items]	LineItems			ul:DisclosureOfGrossProfitAndOperatingCostsLineItems
649	Staff costs	Concept (Monetary)	For Period	Debit	ifrs-full:EmployeeBenefitsExpense
650	Raw and packaging materials and goods purchased for resale	Concept (Monetary)	For Period	Debit	ifrs-full:RawMaterialsAndConsumablesUsed
651	Amortisation of finite-life intangible assets and software	Concept (Monetary)	For Period	Debit	ifrs-full:AmortisationExpense
652	Depreciation of property, plant and equipment	Concept (Monetary)	For Period		ifrs-full:DepreciationPropertyPlantAndEquipment
653	Exchange gains/(losses)	Concept (Monetary)	For Period	Credit	ul:GainLossesOnExchangeDifferenceAmountsOnForwardContractsAndUnderlyingTransactions
654	Lease rentals	Concept (Monetary)	For Period	Debit	ifrs-full:LeaseAndSubleasePaymentsRecognisedAsExpense
655	Minimum operating lease payments	Concept (Monetary)	For Period	Debit	ifrs-full:MinimumOperatingLeasePayments
656	Less: Sub-lease income relating to operating lease agreements	Concept (Monetary)	For Period	Credit	ifrs-full:OperatingLeaseIncome
657	1073 - Disclosure - Employees - Summary of Staff Cost, Average Number of Employees and Key Management Compensation (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeesSummaryOfStaffCostAverageNumberOfEmployeesAndKeyManagementCompensation
658	Disclosure Of Staff And Management Costs [Table]	Table	*	*	ul:DisclosureOfStaffAndManagementCostsTable
659	Additional Information By Geographies [Axis]	Axis			ul:AdditionalInformationByGeographiesAxis
660	Additional Information By Geographies [Member]	Member			ul:AdditionalInformationByGeographiesMember
661	Asia/AMET/RUB [member]	Member			ul:AsiaAfricaMiddleEastTurkeyRussiaUkraineAndBelarusMember
662	The Americas [member]	Member			ul:TheAmericasMember
663	Europe [member]	Member			us-gaap:EuropeMember
664	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
665	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
666	Key management personnel of entity or parent [member]	Member			ifrs-full:KeyManagementPersonnelOfEntityOrParentMember
667	Key management personnel [axis]	Axis			ul:KeyManagementPersonnelAxis
668	Key Management Personnels [member]	Member			ul:KeyManagementPersonnelsMember
669	Executive Directors [Member]	Member			ul:ExecutiveDirectorMember
670	Other [Member]	Member			ul:OtherLeadershipExecutiveExcludingExecutiveDirectorMember
671	Non-Executive Directors [Member]	Member			ul:NonExecutiveDirectorsMember
672	Disclosure Of Staff And Management Costs [Line Items]	LineItems			ul:DisclosureOfStaffAndManagementCostsLineItems
673	Wages and salaries	Concept (Monetary)	For Period	Debit	ifrs-full:WagesAndSalaries
674	Social security costs	Concept (Monetary)	For Period	Debit	ifrs-full:SocialSecurityContributions
675	Other pension costs	Concept (Monetary)	For Period	Debit	ul:PostEmploymentBenefitCosts
676	Share-based compensation costs	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
677	Gross staff costs	Concept (Monetary)	For Period	Debit	ifrs-full:EmployeeBenefitsExpense
678	Average number of employees during the year	Concept (Decimal)	For Period		ifrs-full:AverageNumberOfEmployees
679	Salaries and short-term employee benefits	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
680	Post-employment benefits	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits
681	Share-based benefits	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
682	Key management compensation excluding non-executive director's fee	Concept (Monetary)	For Period	Debit	ul:KeyManagementCompensationExcludingNonExecutiveDirectorsFee
683	Key management compensation	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensation
684	1074 - Disclosure - Employees - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeesAdditionalInformation
685	Disclosure Of Pension Plans [Table]	Table	*	*	ul:DisclosureOfPensionPlansTable
686	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
687	Net Defined Benefit Liability (Asset) [Member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
688	Liabilities [Member]	Member			ifrs-full:PresentValueOfDefinedBenefitObligationMember
689	Retirement Benefit Plans Type [Axis]	Axis			ul:RetirementBenefitPlansTypeAxis
690	Retirement benefit plans type [member]	Member			ul:RetirementBenefitPlansTypeMember
691	Other Post-Employment Benefit Plans [Member]	Member			ul:OtherPostEmploymentBenefitPlansMember
692	Range [axis]	Axis			ifrs-full:RangeAxis
693	Ranges [member]	Member			ifrs-full:RangesMember
694	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
695	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
696	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
697	Defined Benefit Plans [Member]	Member			ul:DefinedBenefitPlanMember
698	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
699	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
700	United Kingdom [Member]	Member			country:GB
701	Netherlands [Member]	Member			country:NL
702	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
703	Other [Member]	Member			ifrs-full:FinancialAssetsMember
704	Special Benefits Trust [Member]	Member			ul:SpecialBenefitsTrustMember
705	Escrow [Member]	Member			ul:EscrowMember
706	Classes of liabilities [axis]	Axis			ifrs-full:ClassesOfLiabilitiesAxis
707	Liabilities [member]	Member			ifrs-full:LiabilitiesMember
708	Pension liabilities [Member]	Member			ul:PensionLiabilitiesMember
709	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
710	Risks [member]	Member			ifrs-full:TypesOfRisksMember
711	Interest rate risk [Member]	Member			ifrs-full:InterestRateRiskMember
712	Inflation rate risk [member]	Member			ul:InflationRateRiskMember
713	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
714	Equity [member]	Member			ifrs-full:EquityMember
715	Unilever securities [Member]	Member			ul:UnileverSecuritiesMember
716	Property, plant and equipment by operating lease status [axis]	Axis			ifrs-full:PropertyPlantAndEquipmentByOperatingLeaseStatusAxis
717	Property, plant and equipment by operating lease status [member]	Member			ifrs-full:PropertyPlantAndEquipmentByOperatingLeaseStatusMember
718	Property and Leases Occupied by Unilever [Member]	Member			ul:PropertyAndLeasesOccupiedByUnileverMember
719	Disclosure Of Pension Plans [Line Items]	LineItems			ul:DisclosureOfPensionPlansLineItems
720	Defined benefit liabilities	Concept (Percent)	For Period		ul:PercentageOfDefinedBenefitPensionLiabilitiesValuedAnnually
721	Defined benefit liabilities	Concept (Percent)	For Period		ul:PercentageOfDefinedBenefitPensionLiabilitiesUpdatedAnnually
722	Rate of level of medical cost inflation	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfMedicalCostTrendRates
723	Period of level of medical cost inflation	Concept (xbrli:durationItemType)	For Period		ul:ActuarialAssumptionOfMedicalCostTrendPeriod
724	Percentage of long term trend future improvements	Concept (Percent)	For Period		ul:PercentageOfLongTermTrendFutureImprovements
725	2016 CMI core projections (Sk)	Concept (Decimal)	As Of		ul:DescriptionOfGrowthRateUsedToForecastCashFlowProjections
726	Actual return on plan assets	Concept (Monetary)	For Period	Debit	ifrs-full:ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset
727	Actual return on plan assets	Concept (Monetary)	For Period	Debit	ul:AssetReturns
728	Interest income	Concept (Monetary)	For Period	Credit	ul:InterestIncomeOnPlanAssets
729	Defined benefit liabilities	Concept (Percent)	For Period		ul:PrincipalDefinedBenefitPlansAsPercentageOfDefinedBenefitsPlans
730	Degree of hedging of liabilities, percentage	Concept (Percent)	For Period		ul:DegreeOfHedgingOfLiabilitiesPercentage
731	Equity securities	Concept (Monetary)	As Of	Debit	ifrs-full:EquityInstrumentsHeld
732	Property and leases	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyAmountContributedToFairValueOfPlanAssets
733	Percentage of plan assets in equity securities	Concept (Percent)	As Of		ul:PercentageOfPlanAssets
734	Excluded plan assets	Concept (Monetary)	As Of	Debit	ul:ExcludedPensionAssets
735	Current estimated group employer contributions, payable in 2016 excluding UK pension fund deficit contributions	Concept (Monetary)	For Period	Credit	ifrs-full:EmployerContributions
736	1075 - Disclosure - Employees - Summary of Assumptions, Weighted by Liabilities for Valuation of Defined Benefit Plans Which cover Approximately 96% of Total Pension Plan (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeesSummaryOfAssumptionsWeightedByLiabilitiesForValuationOfDefinedBenefitPlansWhichCoverApproximately96OfTotalPensionPlan
737	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
738	Retirement Benefit Plans Type [Axis]	Axis			ul:RetirementBenefitPlansTypeAxis
739	Retirement benefit plans type [member]	Member			ul:RetirementBenefitPlansTypeMember
740	Other Post-Employment Benefit Plans [Member]	Member			ul:OtherPostEmploymentBenefitPlansMember
741	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
742	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
743	Defined benefit pension plans [Member]	Member			ul:DefinedBenefitPensionPlansMember
744	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
745	Discount rate	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfDiscountRates
746	Inflation	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflation
747	Rate of increase in salaries	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
748	Rate of increase for pensions in payment (where provided)	Concept (Percent)	As Of		ul:ActuarialAssumptionOfIncreaseForPensionsInPaymentWhereProvided
749	Rate of increase for pensions in deferment (where provided)	Concept (Percent)	As Of		ul:ActuarialAssumptionOfIncreaseForPensionsInDefermentWhereProvided
750	Long-term medical cost inflation	Concept (Percent)	As Of		ul:ActuarialAssumptionOfLongTermMedicalCostInflation
751	1076 - Disclosure - Employees - Summary of Assumptions for Pension Plans Representing Approximately 68% of Defined Benefit Pension Liability (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeesSummaryOfAssumptionsForPensionPlansRepresentingApproximately68OfDefinedBenefitPensionLiability
752	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
753	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
754	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
755	United Kingdom [Member]	Member			ul:UKMember
756	Netherlands [Member]	Member			country:NL
757	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
758	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
759	Pensions in payment [Member]	Member			ul:PensionsInPaymentMember
760	Pensions in deferment [Member]	Member			ul:PensionsInDefermentMember
761	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
762	Discount rate	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfDiscountRates
763	Inflation	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflation
764	Rate of increase in salaries	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
765	Rate of increase for pensions in payment (where provided)	Concept (Percent)	As Of		ul:ActuarialAssumptionOfIncreaseForPensionsInPaymentWhereProvided
766	Rate of increase for pensions in deferment (where provided)	Concept (Percent)	As Of		ul:ActuarialAssumptionOfIncreaseForPensionsInDefermentWhereProvided
767	Number of years a current pensioner is expected to live beyond age 65 - Men	Concept (Decimal)	For Period		ul:LongevityForCurrentPensionersMales
768	Number of years a current pensioner is expected to live beyond age 65 - Women	Concept (Decimal)	For Period		ul:LongevityForCurrentPensionersFemales
769	Number of years a future pensioner currently aged 45 is expected to live beyond age 65 - Men	Concept (Decimal)	For Period		ul:LongevityForFuturePensionersMales
770	Number of years a future pensioner currently aged 45 is expected to live beyond age 65 - Women	Concept (Decimal)	For Period		ul:LongevityForFuturePensionersFemales
771	1077 - Disclosure - Employees - Summary of Charge to Operating Profit (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeesSummaryOfChargeToOperatingProfit
772	Implied Table	Table	*	*	implied:Table
773	Disclosure of defined benefit plans [abstract]	Abstract			ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
774	Current service cost	Concept (Monetary)	For Period	Credit	ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
775	Employee contributions	Concept (Monetary)	For Period	Credit	ifrs-full:EmployeeContributions
776	Special termination benefits	Concept (Monetary)	For Period	Debit	ifrs-full:TerminationBenefitsExpense
777	Past service cost including (losses)/gains on curtailments	Concept (Monetary)	For Period	Credit	ifrs-full:PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset
778	Settlements	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset
779	Defined contribution plans	Concept (Monetary)	For Period	Debit	ifrs-full:PostemploymentBenefitExpenseDefinedContributionPlans
780	Total operating cost	Concept (Monetary)	For Period	Debit	ul:PostEmploymentBenefitCosts
781	Finance income/(cost)	Concept (Monetary)	For Period	Credit	ul:FinanceIncomeCostRelatedToEmployeeBenefitExpense
782	Net impact on the income statement (before tax)	Concept (Monetary)	For Period	Debit	ul:NetEffectOnOperatingProfitBeforeTax
783	1078 - Disclosure - Employees - Summary of Amounts Recognised in Statement of Comprehensive Income on Remeasurement of Net Defined Benefit Liability (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeesSummaryOfAmountsRecognisedInStatementOfComprehensiveIncomeOnRemeasurementOfNetDefinedBenefitLiability
784	Implied Table	Table	*	*	implied:Table
785	Disclosure of defined benefit plans [abstract]	Abstract			ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
786	Return on plan assets excluding amounts included in net finance income/(cost)	Concept (Monetary)	For Period	Debit	ul:AssetReturns
787	Actuarial gains/(losses) arising from changes in demographic assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset
788	Actuarial gains/(losses) arising from changes in financial assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
789	Experience gains/(losses) arising on pension plan and other benefit plan liabilities	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset
790	Total of defined benefit costs recognised in other comprehensive income	Concept (Monetary)	For Period	Debit	ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset
791	1079 - Disclosure - Employees - Summary of Assets, Liabilities and Surplus/ (Deficit) Position of Pension and Other Post-Employment Benefit Plans at Balance Sheet Date (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeesSummaryOfAssetsLiabilitiesAndSurplusDeficitPositionOfPensionAndOtherPostEmploymentBenefitPlansAtBalanceSheetDate
792	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
793	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
794	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
795	Pension Plans [Member]	Member			ul:PensionPlansMember
796	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
797	Net Defined Benefit Liability (Asset) [Member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
798	Assets [Member]	Member			ul:DefinedBenefitPlanAssetsMember
799	Liabilities [Member]	Member			ul:DefinedBenefitPlanLiabilitiesMember
800	Retirement Benefit Plans Type [Axis]	Axis			ul:RetirementBenefitPlansTypeAxis
801	Retirement benefit plans type [member]	Member			ul:RetirementBenefitPlansTypeMember
802	Other Post-Employment Benefit Plans [Member]	Member			ul:OtherPostEmploymentBenefitPlansMember
803	Assets and liabilities [axis]	Axis			ifrs-full:AssetsAndLiabilitiesAxis
804	Assets and liabilities [member]	Member			ifrs-full:AssetsAndLiabilitiesMember
805	Funded Pension Plans in Surplus [Member]	Member			ul:FundedPensionPlansInSurplusMember
806	Funded Pension Plans in Deficit [Member]	Member			ul:FundedPensionPlansInDeficitMember
807	Unfunded Pension Plans [Member]	Member			ul:UnfundedPensionPlansMember
808	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
809	Fair value of assets	Concept (Monetary)	As Of	Debit	ifrs-full:PlanAssetsAtFairValue
810	Present value of liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DefinedBenefitObligationAtPresentValue
811	Pension liability net of assets	Concept (Monetary)	As Of	Debit	ifrs-full:SurplusDeficitInPlan
812	1080 - Disclosure - Employees - Summary of Movements in Assets (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeesSummaryOfMovementsInAssets
813	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
814	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
815	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
816	Assets [Member]	Member			ifrs-full:PlanAssetsMember
817	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
818	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
819	United Kingdom [Member]	Member			country:GB
820	Netherlands [Member]	Member			country:NL
821	All other countries [member]	Member			ul:AllOtherCountriesMember
822	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
823	Beginning balance	Concept (Monetary)	As Of	Debit	ifrs-full:PlanAssetsAtFairValue
824	Employee contributions	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset
825	Settlements	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset
826	Actual return on plan assets (excluding amounts in net finance income/charge)	Concept (Monetary)	For Period	Debit	ul:AssetReturns
827	Interest income	Concept (Monetary)	For Period	Credit	ul:IncomeAsReturnOnPlanAssets
828	Employer contributions	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset
829	Benefit payments	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
830	Currency retranslation	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
831	Others	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
832	Ending balance	Concept (Monetary)	As Of	Debit	ifrs-full:PlanAssetsAtFairValue
833	1081 - Disclosure - Employees - Summary of Movements in Liabilities (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeesSummaryOfMovementsInLiabilities
834	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
835	Classes of liabilities [axis]	Axis			ifrs-full:ClassesOfLiabilitiesAxis
836	Liabilities [member]	Member			ifrs-full:LiabilitiesMember
837	Liabilities [Member]	Member			ifrs-full:PresentValueOfDefinedBenefitObligationMember
838	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
839	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
840	United Kingdom [Member]	Member			country:GB
841	Netherlands [Member]	Member			country:NL
842	All other countries [member]	Member			ul:AllOtherCountriesMember
843	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
844	Beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:DefinedBenefitObligationAtPresentValue
845	Current service cost	Concept (Monetary)	For Period	Credit	ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
846	Employee contributions	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset
847	Special termination benefits	Concept (Monetary)	For Period	Debit	ifrs-full:TerminationBenefitsExpense
848	Past service costs including (losses)/gains on curtailments	Concept (Monetary)	For Period	Credit	ifrs-full:PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset
849	Settlements	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset
850	Interest cost	Concept (Monetary)	For Period	Debit	ul:InterestCostRelatedToEmployeeBenefitExpense
851	Actuarial gain/(loss) arising from changes in demographic assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset
852	Actuarial gain/(loss) arising from changes in financial assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
853	Actuarial gain/(loss) arising from experience adjustments	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset
854	Benefit payments	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
855	Currency retranslation	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
856	Others	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
857	Ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:DefinedBenefitObligationAtPresentValue
858	1082 - Disclosure - Employees - Summary of Movements in (Deficit)/Surplus (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeesSummaryOfMovementsInDeficitSurplus
859	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
860	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
861	Equity [member]	Member			ifrs-full:EquityMember
862	Assets net of liabilities [member]	Member			ul:AssetsNetOfLiabilitiesMember
863	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
864	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
865	United Kingdom [Member]	Member			country:GB
866	Netherlands [Member]	Member			country:NL
867	All other countries [member]	Member			ul:AllOtherCountriesMember
868	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
869	Beginning balance	Concept (Monetary)	As Of	Debit	ifrs-full:SurplusDeficitInPlan
870	Current service cost	Concept (Monetary)	For Period	Credit	ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
871	Employee contributions	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset
872	Special termination benefits	Concept (Monetary)	For Period	Debit	ifrs-full:TerminationBenefitsExpense
873	Past service costs including (losses)/gains on curtailments	Concept (Monetary)	For Period	Credit	ifrs-full:PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset
874	Settlements	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset
875	Actual return on plan assets (excluding amounts in net finance income/charge)	Concept (Monetary)	For Period	Debit	ul:AssetReturns
876	Interest cost	Concept (Monetary)	For Period	Debit	ul:InterestCostRelatedToEmployeeBenefitExpense
877	Interest income	Concept (Monetary)	For Period	Credit	ul:InterestIncomeOnPlanAssets
878	Actuarial gain/(loss) arising from changes in demographic assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset
879	Actuarial gain/(loss) arising from changes in financial assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
880	Actuarial gain/(loss) arising from experience adjustments	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset
881	Employer contributions	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset
882	Benefit payments	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
883	Currency retranslation	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
884	Others	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
885	Ending balance	Concept (Monetary)	As Of	Debit	ifrs-full:SurplusDeficitInPlan
886	1083 - Disclosure - Employees - Summary of Principal Defined Benefit Liabilities and Split of Liabilities Between Different Categories of Plan Participants (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeesSummaryOfPrincipalDefinedBenefitLiabilitiesAndSplitOfLiabilitiesBetweenDifferentCategoriesOfPlanParticipants
887	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
888	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
889	Net Defined Benefit Liability (Asset) [Member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
890	Active members [Member]	Member			ul:ActiveEmployeesMember
891	Deferred members [Member]	Member			ul:DeferredEmployeesMember
892	Retired members [Member]	Member			ul:RetiredEmployeesMember
893	Range [axis]	Axis			ifrs-full:RangeAxis
894	Ranges [member]	Member			ifrs-full:RangesMember
895	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
896	Top of range [member]	Member			ifrs-full:TopOfRangeMember
897	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
898	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
899	United Kingdom [Member]	Member			country:GB
900	Netherlands [Member]	Member			country:NL
901	All other countries [member]	Member			ul:AllOtherCountriesMember
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905	1084 - Disclosure - Employees - Schedule of Fair Value of Plans Assets, Which Are Reported Net of Fund Liabilities That Are Not Employee Benefits (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeesScheduleOfFairValueOfPlansAssetsWhichAreReportedNetOfFundLiabilitiesThatAreNotEmployeeBenefits
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920	Investment Grade Corporate Bonds [Member]	Member			ul:InvestmentGradeCorporateBondsMember
921	Other fixed income [Member]	Member			ul:OtherFixedIncomeMember
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924	Equities total	Concept (Monetary)	As Of	Debit	ifrs-full:EquityInstrumentsAmountContributedToFairValueOfPlanAssets
925	Fixed income total	Concept (Monetary)	As Of	Debit	ifrs-full:DebtInstrumentsAmountContributedToFairValueOfPlanAssets
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927	Property and real estate	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyAmountContributedToFairValueOfPlanAssets
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930	Other plans	Concept (Monetary)	As Of	Debit	ul:AmountContributedToOtherFairValueOfPlanAssets
931	Derivatives	Concept (Monetary)	As Of	Debit	ifrs-full:DerivativesAmountContributedToFairValueOfPlanAssets
932	1085 - Disclosure - Employees - Schedule of Sensitivity of Pension Liabilities to Changes in the Weighted Key Assumptions (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeesScheduleOfSensitivityOfPensionLiabilitiesToChangesInTheWeightedKeyAssumptions
933	Disclosure of sensitivity analysis for actuarial assumptions [table]	Table	*	*	ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable
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937	Inflation Rate [Member]	Member			ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflationMember
938	Life expectancy [Member]	Member			ul:ActuarialAssumptionOfLifeExpectancyMember
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940	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
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943	Netherlands [Member]	Member			country:NL
944	Disclosure of sensitivity analysis for actuarial assumptions [line items]	LineItems			ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems
945	Change in assumption	Concept (Text/String)	For Period		ifrs-full:DescriptionOfChangesInMethodsAndAssumptionsUsedInPreparingSensitivityAnalysisForActuarialAssumptions
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948	Disclosure Of Employee Benefit Plan [Table]	Table	*	*	ul:DisclosureOfEmployeeBenefitPlanTable
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950	Non-adjusting events after reporting period [member]	Member			ifrs-full:NonadjustingEventsMember
951	Future estimate [member]	Member			ul:FutureEstimateMember
952	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
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959	Group cash flow in respect of pensions and similar benefits	Concept (Monetary)	For Period	Debit	ul:CashFlowInRespectOfPensionsAndSimilarBenefits
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961	Disclosure Of Share Based Compensation Plans [Table]	Table	*	*	ul:DisclosureOfShareBasedCompensationPlansTable
962	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
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964	Performance share plans [Member]	Member			ul:PerformanceSharePlansMember
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966	Disclosure of Share Based Compensation Plans [Line Items]	LineItems			ul:DisclosureOfShareBasedCompensationPlansLineItems
967	Income statement charge	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
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969	Disclosure Of Share Based Compensation Plans [Table]	Table	*	*	ul:DisclosureOfShareBasedCompensationPlansTable
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974	Key management personnel [axis]	Axis			ul:KeyManagementPersonnelAxis
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978	Disclosure of Share Based Compensation Plans [Line Items]	LineItems			ul:DisclosureOfShareBasedCompensationPlansLineItems
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980	Maximum percentage of annual bonus that managers are entitled to invest in shares under MCIP	Concept (Percent)	For Period		ul:MaximumPercentageOfAnnualBonusThatManagersAreEntitledToInvestInMcipShares
981	Shares and options outstanding in respect of share-based compensation plans	Concept (Shares)	As Of		ul:SharesAndOptionsHeldInRespectOfSharebasedCompensationPlans
982	Number of ordinary shares held by NV group companies to satisfy options granted	Concept (Shares)	As Of		ul:NumberOfOrdinarySharesHeldToSatisfyOptionsGranted
983	Shares acquired to called up share capital, percentage	Concept (Percent)	For Period		ul:SharesAcquiredToCalledUpShareCapitalPercentage
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986	Market value of shares held in respect of share-based compensation plans eliminated on consolidation	Concept (Monetary)	As Of	Credit	ul:MarketValueOfSharesHeldInRespectOfSharebasedCompensationPlansEliminatedOnConsolidation
987	PLC option with exercise price above market price	Concept (Shares)	As Of		ul:NumberOfOptionsWithExercisePriceAboveMarketPrice
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989	Performance share plan : Number of shares vested between 31/12/2018 and 21/02/2019	Concept (Shares)	For Period		ul:PerformanceSharePlansNumberOfSharesVested
990	Performance share plan : Number of shares forfeited between 31/12/2018 and 21/02/2019	Concept (Shares)	For Period		ul:PerformanceSharePlansNumberOfSharesForfeited
991	1089 - Disclosure - Employees - Summary of Status of Performance Share Plans and Related Changes (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeesSummaryOfStatusOfPerformanceSharePlansAndRelatedChanges
992	Disclosure Of Share Based Compensation Plans [Table]	Table	*	*	ul:DisclosureOfShareBasedCompensationPlansTable
993	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
994	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
995	Performance share plans [Member]	Member			ul:PerformanceSharePlansMember
996	Disclosure of Share Based Compensation Plans [Line Items]	LineItems			ul:DisclosureOfShareBasedCompensationPlansLineItems
997	Outstanding at 1 January	Concept (Decimal)	As Of		ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
998	Awarded	Concept (Decimal)	For Period		ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
999	Vested	Concept (Decimal)	For Period		ifrs-full:NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
1000	Forfeited	Concept (Decimal)	For Period		ifrs-full:NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
1001	Outstanding at 31 December	Concept (Decimal)	As Of		ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1002	Fair value per share award during the year	Concept (Share)	As Of		ul:FairValuePerShareAwardDuringYear
1003	1090 - Disclosure - Net Finance Cost - Summary of Net Finance Costs (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureNetFinanceCostSummaryOfNetFinanceCosts
1004	Disclosure Of Detailed Information About Finance Income Expense [table]	Table	*	*	ul:DisclosureOfDetailedInformationAboutFinanceIncomeExpenseTable
1005	Trading Activity By Type 1 [Axis]	Axis			ul:TradingActivityByType1Axis
1006	Trading Activity By Type 1 [Domain]	Member			ul:TradingActivityByType1Domain
1007	Foreign exchange derivatives [member]	Member			ul:ForeignExchangeDerivativesMember
1008	Exchange Differences On Underlying Items [Member]	Member			ul:ExchangeDifferencesOnTranslationMember
1009	Disclosure of detailed information about finance income expense [Line Items]	LineItems			ul:DisclosureOfDetailedInformationAboutFinanceIncomeExpenseLineItems
1010	Finance costs	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
1011	Bank loans and overdrafts	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpenseOnBankLoansAndOverdrafts
1012	Interest on bonds and other loans	Concept (Monetary)	For Period	Debit	ul:InterestExpenseOnBondsAndOtherLoans
1013	Dividends paid on preference shares	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaidOtherShares
1014	Net gain/(loss) on transactions for which hedge accounting is not applied	Concept (Monetary)	For Period	Credit	ul:NetGainsLossesOnTransactionsForWhichHedgeAccountingIsNotApplied
1015	Finance income	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncome
1016	Pensions and similar obligations	Concept (Monetary)	For Period	Debit	ul:InterestOnPensionsAndOtherSimilarObligations
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1018	Premium paid on buyback of preference shares	Concept (Monetary)	For Period	Debit	ul:PremiumPaidOnBuyBackOfPreferenceShares
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1021	Implied Table	Table	*	*	implied:Table
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1024	Provision for interest on indirect tax	Concept (Monetary)	For Period	Debit	ul:ProvisionForInterestOnIndirectTax
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1026	Implied Table	Table	*	*	implied:Table
1027	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
1028	Current tax	Abstract			ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriodsAbstract
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1032	Deferred tax	Abstract			ifrs-full:DeferredTaxExpenseIncomeAbstract
1033	Origination and reversal of temporary differences	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences
1034	Changes in tax rates	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes
1035	Recognition of previously unrecognised losses brought forward	Concept (Monetary)	For Period	Credit	ifrs-full:TaxBenefitArisingFromPreviouslyUnrecognisedTaxLossTaxCreditOrTemporaryDifferenceOfPriorPeriodUsedToReduceDeferredTaxExpense
1036	Deferred tax expense (income)	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncome
1037	Total tax expense (income)	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
1038	1093 - Disclosure - Taxation - Summary of Reconciliation of Effective Tax Rate (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTaxationSummaryOfReconciliationOfEffectiveTaxRate
1039	Implied Table	Table	*	*	implied:Table
1040	Reconciliation of average effective tax rate and applicable tax rate [abstract]	Abstract			ifrs-full:ReconciliationOfAverageEffectiveTaxRateAndApplicableTaxRateAbstract
1041	Computed rate of tax(a)	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
1042	Incentive tax credits	Concept (Percent)	For Period		ul:TaxRateEffectOfIncentiveTaxCredits
1043	Withholding tax on dividends	Concept (Percent)	For Period		ul:TaxRateEffectOfWithholdingTaxOnDividends
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1045	Irrecoverable withholding tax	Concept (Percent)	For Period		ul:TaxRateEffectOfIrrecoverableWitholdingTax
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1047	Transfer to/(from) unrecognised deferred tax assets	Concept (Percent)	For Period		ul:TaxRateEffectOfTransferToFromUnrecognisedDeferredTaxAssets
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1050	Non-underlying items within operating profit(b)	Concept (Percent)	For Period		ul:TaxRateEffectOfNonunderlyingItemsWithinOperatingProfit
1051	Premium paid on Buyback of preference shares(b)	Concept (Percent)	For Period		ul:TaxRateEffectOfPremiumPaidOnBuyBackOfPreferenceShares
1052	Impact of US tax reform(b)	Concept (Percent)	For Period		ul:TaxRateEffectImpactOfUsFederalTaxReform
1053	Impact of Spreads disposal(b)	Concept (Percent)	For Period		ul:TaxRateEffectImpactOfSpreadsDisposal
1054	Effective tax rate	Concept (Percent)	For Period		ifrs-full:AverageEffectiveTaxRate
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1056	Disclosure of temporary difference, unused tax losses and unused tax credits [table]	Table	*	*	ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
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1059	Pensions and similar obligations [Member]	Member			ul:PensionsAndSimilarObligationsMember
1060	Provisions and accruals [member]	Member			ul:ProvisionsAndAccrualsMember
1061	Goodwill and intangible assets [Member]	Member			ul:GoodwillAndIntangibleAssetsMember
1062	Accelerated tax depreciation [Member]	Member			ul:AcceleratedTaxDepreciationMember
1063	Tax losses [Member]	Member			ul:TaxLossesMember
1064	Fair value gains [Member]	Member			ul:FairValueGainsMember
1065	Fair value losses [Member]	Member			ul:FairValueLossesMember
1066	Share-based payments [Member]	Member			ul:SharebasedPaymentsMember
1067	Other [Member]	Member			ifrs-full:OtherTemporaryDifferencesMember
1068	Disclosure of temporary difference, unused tax losses and unused tax credits [line items]	LineItems			ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
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1074	Implied Table	Table	*	*	implied:Table
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1077	Unused tax credits for which deferred tax asset recognised or not	Concept (Monetary)	As Of	Debit	ul:UnusedTaxCreditsForWhichDeferredTaxAssetRecognisedOrNot
1078	Unused tax losses for which no deferred tax asset recognised	Concept (Monetary)	As Of		ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1079	Unused tax credits for which no deferred tax asset recognised	Concept (Monetary)	As Of		ifrs-full:UnusedTaxCreditsForWhichNoDeferredTaxAssetRecognised
1080	Tax losses and credits for which deferred tax has not been recognized and which have a date to expire	Concept (Monetary)	For Period	Debit	ul:TaxLossesAndCreditsForWhichNoDeferredTaxAssetRecognisedAndWhichHaveDateToExpire
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1082	Aggregate amount of temporary differences associated with undistributed earnings of subsidiaries for which deferred tax liabilities have not been recognised	Concept (Monetary)	As Of		ifrs-full:TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures
1083	1096 - Disclosure - Taxation - Summary of Deferred Tax Assets and Liabilities (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTaxationSummaryOfDeferredTaxAssetsAndLiabilities
1084	Disclosure of temporary difference, unused tax losses and unused tax credits [table]	Table	*	*	ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
1085	Temporary difference, unused tax losses and unused tax credits [axis]	Axis			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1086	Temporary difference, unused tax losses and unused tax credits [member]	Member			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1087	Pensions and similar obligations [Member]	Member			ul:PensionsAndSimilarObligationsMember
1088	Provisions and accruals [member]	Member			ul:ProvisionsAndAccrualsMember
1089	Goodwill and intangible assets [Member]	Member			ul:GoodwillAndIntangibleAssetsMember
1090	Accelerated tax depreciation [Member]	Member			ul:AcceleratedTaxDepreciationMember
1091	Tax losses [Member]	Member			ul:TaxLossesMember
1092	Fair value gains [Member]	Member			ul:FairValueGainsMember
1093	Fair value losses [Member]	Member			ul:FairValueLossesMember
1094	Share-based payments [Member]	Member			ul:SharebasedPaymentsMember
1095	Other [Member]	Member			ifrs-full:OtherTemporaryDifferencesMember
1096	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1097	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1098	More than 1 year [Member]	Member			ifrs-full:LaterThanOneYearMember
1099	Disclosure of temporary difference, unused tax losses and unused tax credits [line items]	LineItems			ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
1100	Assets	Concept (Monetary)	As Of	Debit	ul:DeferredTaxAssetsNet1
1101	Liabilities	Concept (Monetary)	As Of	Credit	ul:DeferredTaxLiabilitiesNet
1102	Total	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
1103	1097 - Disclosure - Taxation - Tax Effects of Components of Other Comprehensive Income (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTaxationTaxEffectsOfComponentsOfOtherComprehensiveIncome
1104	Implied Table	Table	*	*	implied:Table
1105	Income tax relating to components of other comprehensive income [abstract]	Abstract			ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeAbstract
1106	Before tax	Abstract			ul:OtherComprehensiveIncomeBeforeTaxAbstract
1107	Gains/(losses) on equity instruments at fair value through other comprehensive income, Before tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesFromInvestmentsInEquityInstruments
1108	Gains/(losses) on cash flow hedges, Before tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxCashFlowHedges
1109	Gains/(losses) on other financial instruments, Before tax	Concept (Monetary)	For Period	Credit	ul:GainsLossesOnOtherFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeBeforeTax
1110	Remeasurements of defined benefit pension plans, Before tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
1111	Currency retranslation gains/(losses), Before tax	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationBeforeTax
1112	Other comprehensive income, Before tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTax
1113	Tax (charge)/credit	Abstract			ul:OtherComprehensiveIncomeTaxAbstract
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1115	Gains/(losses) on cash flow hedges, Tax (charge)/credit	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome
1116	Gains/(losses) on other financial instruments, Tax (charge)/credit	Concept (Monetary)	For Period	Credit	ul:IncomeTaxRelatingToOtherFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
1117	Remeasurements of defined benefit pension plans, Tax (charge)/credit	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome
1118	Currency retranslation gains/(losses),Tax (charge)/credit	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome
1119	Other comprehensive income, Tax (charge)/credit	Concept (Monetary)	For Period		ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
1120	After tax	Abstract			ul:OtherComprehensiveIncomeNetOfTaxAbstract
1121	Gains/(losses) on equity instruments at fair value through other comprehensive income, After tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments
1122	Gains/(losses) on cash flow hedges, After tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxCashFlowHedges
1123	Gains/(losses) on other financial instruments, After tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
1124	Remeasurements of defined benefit pension plans, After tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
1125	Currency retranslation gains/(losses), After tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
1126	Other comprehensive income, After tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
1127	1098 - Disclosure - Combined Earnings Per Share - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCombinedEarningsPerShareAdditionalInformation
1128	Implied Table	Table	*	*	implied:Table
1129	Earnings per share [abstract]	Abstract			ifrs-full:EarningsPerShareAbstract
1130	Description on diluted earnings per share and underlying earnings per share calculation	Concept (Text/String)	For Period		ifrs-full:ExplanationOfAdjustmentsBetweenDenominatorsUsedToCalculateBasicAndDilutedEarningsPerShare
1131	1099 - Disclosure - Combined Earnings Per Share - Summary of Computation of Earnings Per Share (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCombinedEarningsPerShareSummaryOfComputationOfEarningsPerShare
1132	Earnings per share [table]	Table	*	*	ifrs-full:EarningsPerShareTable
1133	Parent Companies of the Group [axis]	Axis			ul:ParentCompaniesOfTheGroupAxis
1134	Parent Companies of the Group [Domain]	Member			ul:ParentCompaniesOfTheGroupDomain
1135	Unilever N.V. [member]	Member			ul:UnileverNVMember
1136	Unilever PLC [member]	Member			ul:UnileverPLCMember
1137	Earnings per share [line items]	LineItems			ifrs-full:EarningsPerShareLineItems
1138	Basic earnings per share	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
1139	Diluted earnings per share	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShare
1140	Underlying earnings per share	Concept (Share)	For Period		ul:UnderlyingEarningsPerShare
1141	Less treasury shares held by employee share trusts and companies	Concept (Shares)	As Of		ul:SharesHeldByEmployeeShareTrustsAndCompanies
1142	Combined average number of share units	Concept (Shares)	For Period		ifrs-full:WeightedAverageShares
1143	Add dilutive effect of share-based compensation plans	Concept (Shares)	For Period		ifrs-full:DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares
1144	Diluted combined average number of share units - used for diluted and underlying earnings per share	Concept (Shares)	For Period		ifrs-full:AdjustedWeightedAverageShares
1145	Net profit	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
1146	Non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToNoncontrollingInterests
1147	Net profit attributable to shareholders' equity - used for basic and diluted earnings per share	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
1148	Post tax impact of non-underlying items	Concept (Monetary)	For Period	Credit	ul:NonUnderlyingIncomeOrExpenseAfterTaxAttributableToParent
1149	Underlying profit attributable to shareholders' equity - used for underlying earnings per share	Concept (Monetary)	For Period	Credit	ul:UnderlyingEarningsAttributableToParentToShareholdersEquity
1150	1100 - Disclosure - Dividends on Ordinary Capital - Summary of Dividends on Ordinary Capital (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureDividendsOnOrdinaryCapitalSummaryOfDividendsOnOrdinaryCapital
1151	Disclosure of Dividends [Table]	Table	*	*	ul:DisclosureOfDividendsTable
1152	Parent Companies of the Group [axis]	Axis			ul:ParentCompaniesOfTheGroupAxis
1153	Parent Companies of the Group [Domain]	Member			ul:ParentCompaniesOfTheGroupDomain
1154	Unilever N.V. [member]	Member			ul:UnileverNVMember
1155	Unilever PLC [member]	Member			ul:UnileverPLCMember
1156	Disclosure of Dividends [Line Items]	LineItems			ul:DisclosureOfDividendsLineItems
1157	Dividend on ordinary capital during the year	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaid
1158	1101 - Disclosure - Dividends on Ordinary Capital - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureDividendsOnOrdinaryCapitalAdditionalInformation
1159	Disclosure of Dividends [Table]	Table	*	*	ul:DisclosureOfDividendsTable
1160	Parent Companies of the Group [axis]	Axis			ul:ParentCompaniesOfTheGroupAxis
1161	Parent Companies of the Group [Domain]	Member			ul:ParentCompaniesOfTheGroupDomain
1162	Unilever N.V. [member]	Member			ul:UnileverNVMember
1163	Unilever PLC [member]	Member			ul:UnileverPLCMember
1164	Disclosure of Dividends [Line Items]	LineItems			ul:DisclosureOfDividendsLineItems
1165	Dividend declared and paid during the year	Concept (Share)	For Period		ifrs-full:DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwnersPerShare
1166	Dividend declared and paid during the year	Concept (Share)	For Period		ifrs-full:DividendsPaidOrdinarySharesPerShare
1167	Dividends declared per ordinary share	Concept (Share)	For Period		ul:DividendDeclaredForPeriod
1168	1102 - Disclosure - Goodwill and Intangible Assets - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsAdditionalInformation
1169	Disclosure of detailed information about intangible assets [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsTable
1170	Range [axis]	Axis			ifrs-full:RangeAxis
1171	Ranges [member]	Member			ifrs-full:RangesMember
1172	Top of range [member]	Member			ifrs-full:TopOfRangeMember
1173	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
1174	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
1175	Blueair [member]	Member			ul:BlueairMember
1176	Assets and liabilities classified as held for sale [axis]	Axis			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis
1177	Assets and liabilities not classified as held for sale [member]	Member			ifrs-full:AssetsAndLiabilitiesNotClassifiedAsHeldForSaleMember
1178	Disposal Groups Held for Sale [member]	Member			ifrs-full:DisposalGroupsClassifiedAsHeldForSaleMember
1179	Effect of overlay approach reclassification [axis]	Axis			ifrs-full:EffectOfOverlayApproachReclassificationAxis
1180	In accordance with IFRS 9 [member]	Member			ifrs-full:InAccordanceWithIFRS9Member
1181	IAS 29 [member]	Member			ul:IASTwentyNineMember
1182	Disclosure of detailed information about intangible assets [line items]	LineItems			ifrs-full:DisclosureOfIntangibleAssetsLineItems
1183	Number of divisions included in cash generating units	Concept (Integer)	For Period		ul:NumberOfDivisionsIncludedInCashGeneratingUnits
1184	Number of geographical areas included in cash generating units	Concept (Integer)	For Period		ul:NumberOfGeographicalAreasIncludedInCashGeneratingUnits
1185	Number of cash generating units	Concept (Integer)	For Period		ul:NumberOfCashGeneratingUnits
1186	Amortisation period of finite-life intangible assets	Concept (Text/String)	For Period		ifrs-full:UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwill
1187	Increase in goodwill	Concept (Monetary)	For Period	Debit	ifrs-full:ChangesInGoodwill
1188	Non-cash credit from early settlement of contingent consideration	Concept (Monetary)	For Period	Debit	ul:NoncashCreditFromEarlySettlementOfContingentConsideration
1189	Impairment of intangible asset	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill
1190	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
1191	Indefinite-life intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsWithIndefiniteUsefulLife
1192	Pre-tax discount rate	Concept (Percent)	As Of		ifrs-full:DescriptionOfDiscountRatesAppliedToCashFlowProjections
1193	Projection period	Concept (xbrli:durationItemType)	For Period		ul:DiscountedCashFlowProjectionPeriod
1194	1103 - Disclosure - Goodwill and Intangible Assets - Summary of Net Book Value Goodwill and Intangible Assets (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsSummaryOfNetBookValueGoodwillAndIntangibleAssets
1195	Disclosure of reconciliation of changes in intangible assets and goodwill [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable
1196	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
1197	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
1198	Goodwill [member]	Member			ifrs-full:GoodwillMember
1199	Indefinite-life intangible assets [Member]	Member			ul:IndefiniteLifeIntangibleAssetsMember
1200	Finite-life intangible assets [Member]	Member			ul:FiniteLifeIntangibleAssetsMember
1201	Software [Member]	Member			ifrs-full:ComputerSoftwareMember
1202	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1203	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1204	Cost [Member]	Member			ifrs-full:GrossCarryingAmountMember
1205	Accumulated depreciation, amortisation and impairment [member]	Member			ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
1206	Disclosure of reconciliation of changes in intangible assets and goodwill [line items]	LineItems			ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems
1207	Beginning balance	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
1208	Hyperinflation restatement to 1 January 2018	Concept (Monetary)	For Period	Credit	ul:HyperinflationaryOpeningBalanceRestatementIntangibleAssetsAndGoodwill
1209	Acquisitions of group companies	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill
1210	Amortisation/impairment for the year	Concept (Monetary)	For Period		ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
1211	Disposals of group companies	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughLossOfControlOfSubsidiaryIntangibleAssetsAndGoodwill
1212	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsIntangibleAssetsOtherThanGoodwill
1213	Reclassification to held for sale	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughClassifiedAsHeldForSaleIntangibleAssetsAndGoodwill
1214	Reclassification from held for sale	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughTransfersIntangibleAssetsAndGoodwill
1215	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
1216	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsIntangibleAssetsAndGoodwill
1217	Currency retranslation	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill
1218	Hyperinflationary adjustment	Concept (Monetary)	For Period	Debit	ul:HyperinflationaryAdjustmentIntangibleAssetsAndGoodwill
1219	Ending balance	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
1220	1104 - Disclosure - Goodwill and Intangible Assets - Summary of Net Book Value Goodwill and Intangible Assets (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsSummaryOfNetBookValueGoodwillAndIntangibleAssetsParenthetical
1221	Disclosure of reconciliation of changes in intangible assets and goodwill [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable
1222	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
1223	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
1224	Knorr [member]	Member			ul:KnorrMember
1225	Carver Korea [member]	Member			ul:CarverKoreaMember
1226	Hellmann's [member]	Member			ul:HellmannMember
1227	Assets and liabilities classified as held for sale [axis]	Axis			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis
1228	Assets and liabilities not classified as held for sale [member]	Member			ifrs-full:AssetsAndLiabilitiesNotClassifiedAsHeldForSaleMember
1229	Disposal Groups Held for Sale [member]	Member			ifrs-full:DisposalGroupsClassifiedAsHeldForSaleMember
1230	Disclosure of reconciliation of changes in intangible assets and goodwill [line items]	LineItems			ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems
1231	Goodwill and intangible assets reclassified as held for sale	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughClassifiedAsHeldForSaleIntangibleAssetsAndGoodwill
1232	Indefinite-life intangible assets that have significant carrying value	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
1233	1105 - Disclosure - Goodwill and Intangible Assets - Summary of Goodwill and Indefinite-life Intangible Assets Held in Significant CGUs (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsSummaryOfGoodwillAndIndefinitelifeIntangibleAssetsHeldInSignificantCGUs
1234	Disclosure of detailed information about intangible assets [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsTable
1235	Cash-generating units [axis]	Axis			ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
1236	Entity's total for cash-generating units [member]	Member			ifrs-full:EntitysTotalForCashgeneratingUnitsMember
1237	Food and Refreshment [Member]	Member			ul:FoodAndRefreshmentMember
1238	Beauty & Personal Care [member]	Member			ul:BeautyAndPersonalCareMember
1239	Foods (excluding Spreads) [member]	Member			ul:FoodsExcludingSpreadsMember
1240	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1241	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1242	Europe [member]	Member			us-gaap:EuropeMember
1243	The Americas [member]	Member			ul:TheAmericasMember
1244	Asia/AMET/RUB [member]	Member			ul:AsiaAfricaMiddleEastTurkeyRussiaUkraineAndBelarusMember
1245	Disclosure of detailed information about intangible assets [line items]	LineItems			ifrs-full:DisclosureOfIntangibleAssetsLineItems
1246	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
1247	Indefinite-life intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsWithIndefiniteUsefulLife
1248	1106 - Disclosure - Goodwill and Intangible Assets - Summary of Key Assumptions Used in Discounted Cash Flow (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsSummaryOfKeyAssumptionsUsedInDiscountedCashFlow
1249	Disclosure of detailed information about intangible assets [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsTable
1250	Cash-generating units [axis]	Axis			ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
1251	Entity's total for cash-generating units [member]	Member			ifrs-full:EntitysTotalForCashgeneratingUnitsMember
1252	Food and Refreshment [Member]	Member			ul:FoodAndRefreshmentMember
1253	Beauty & Personal Care [member]	Member			ul:BeautyAndPersonalCareMember
1254	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1255	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1256	Europe [member]	Member			us-gaap:EuropeMember
1257	The Americas [member]	Member			ul:TheAmericasMember
1258	Asia/AMET/RUB [member]	Member			ul:AsiaAfricaMiddleEastTurkeyRussiaUkraineAndBelarusMember
1259	Disclosure of detailed information about intangible assets [line items]	LineItems			ifrs-full:DisclosureOfIntangibleAssetsLineItems
1260	Longer-term sustainable growth rates	Concept (Percent)	For Period		ul:LongTermSustainableGrowthRateUsedToDiscountedCashFlowProjections
1261	Average near-term nominal growth rates	Concept (Percent)	For Period		ul:AverageNearTermNominalGrowthRateUsedToDiscountedCashFlowProjections
1262	Average operating margins	Concept (Percent)	For Period		ul:AverageOperatingMarginsUsedToDiscountedCashFlowProjections
1263	1107 - Disclosure - Property, Plant and Equipment - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentAdditionalInformation
1264	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1265	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1266	Property, plant and equipment [member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1267	Freehold buildings [Member]	Member			ul:FreeholdBuildingsMember
1268	Leasehold land and buildings [Member]	Member			ul:LeaseholdLandAndBuildingsMember
1269	Plant and equipment [Member]	Member			ul:PlantAndEquipmentMember
1270	Disclosure of Detailed Information about Property, Plant and Equipment [Line Items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1271	Estimated useful lives	Concept (Text/String)	For Period		ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
1272	Commitments to purchase property, plant and equipment	Concept (Monetary)	As Of	Credit	ifrs-full:ContractualCommitmentsForAcquisitionOfPropertyPlantAndEquipment
1273	1108 - Disclosure - Property, Plant and Equipment - Summary of Movements in Property, Plant and Equipment (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentSummaryOfMovementsInPropertyPlantAndEquipment
1274	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1275	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1276	Property, plant and equipment [member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1277	Land and buildings [Member]	Member			ifrs-full:LandAndBuildingsMember
1278	Plant and equipment [Member]	Member			ul:PlantAndEquipmentMember
1279	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1280	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1281	Cost [Member]	Member			ifrs-full:GrossCarryingAmountMember
1282	Accumulated depreciation [Member]	Member			ifrs-full:AccumulatedDepreciationAndAmortisationMember
1283	Disclosure of Detailed Information about Property, Plant and Equipment [Line Items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1284	Beginning balance	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1285	Hyperinflation restatement at the beginning of the year	Concept (Monetary)	As Of	Debit	ul:HyperinflationaryOpeningBalanceRestatementPropertyPlantAndEquipment
1286	Acquisitions of group companies	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment
1287	Disposals of group companies	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughLossOfControlOfSubsidiaryPropertyPlantAndEquipment
1288	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
1289	Depreciation charge for the year	Concept (Monetary)	For Period		ifrs-full:DepreciationPropertyPlantAndEquipment
1290	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsPropertyPlantAndEquipment
1291	Hyperinflationary adjustment	Concept (Monetary)	For Period	Debit	ul:HyperinflationaryAdjustmentForPropertyPlantAndEquipment
1292	Currency retranslation	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
1293	Reclassification as held for sale	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughClassifiedAsHeldForSalePropertyPlantAndEquipment
1294	Ending balance	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1295	Includes capital expenditures for assets under construction	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentExpendituresRecognisedForConstructions
1296	1109 - Disclosure - Property, Plant and Equipment - Summary of Movements in Property, Plant and Equipment (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentSummaryOfMovementsInPropertyPlantAndEquipmentParenthetical
1297	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1298	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1299	Property, plant and equipment [member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1300	Freehold land [Member]	Member			ul:FreeholdLandMember
1301	Spreads business [member]	Member			ul:SpreadsBusinessMember
1302	Disclosure of Detailed Information about Property, Plant and Equipment [Line Items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1303	Property, plant and equipment, net	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1304	1110 - Disclosure - Other Non-Current Assets - Summary of Other Non-current Assets (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureOtherNonCurrentAssetsSummaryOfOtherNoncurrentAssets
1305	Implied Table	Table	*	*	implied:Table
1306	Miscellaneous non-current assets [abstract]	Abstract			ifrs-full:MiscellaneousNoncurrentAssetsAbstract
1307	Interest in net assets of joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVentures
1308	Interest in net assets of associates	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInAssociates
1309	Long-term trade and other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentReceivables
1310	Operating lease prepayments for land	Concept (Monetary)	As Of	Debit	ul:OperatingLeaseRelatedPrepaymentsNonCurrent
1311	Fair value of biological assets	Concept (Monetary)	As Of	Debit	ifrs-full:BiologicalAssets
1312	Other non-current assets	Concept (Monetary)	As Of	Debit	ul:OtherMiscellaneousNoncurrentAssets
1313	Total other non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentAssets
1314	1111 - Disclosure - Other Non-Current Assets - Movements in Interest in Joint Ventures and Associates (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureOtherNonCurrentAssetsMovementsInInterestInJointVenturesAndAssociates
1315	Disclosure Of Joint Ventures And Associates [Table]	Table	*	*	ul:DisclosureOfJointVenturesAndAssociatesTable
1316	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1317	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1318	Joint ventures [member]	Member			ifrs-full:JointVenturesMember
1319	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
1320	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
1321	Associates [member]	Member			ifrs-full:AssociatesMember
1322	Disclosure Of Joint Ventures And Associates [Line Items]	LineItems			ul:DisclosureOfJointVenturesAndAssociatesLineItems
1323	Beginning balance	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentAssets
1324	Additions	Concept (Monetary)	For Period	Debit	ul:IncreaseDecreaseInOtherNoncurrentAssets1
1325	Dividend received/reductions	Concept (Monetary)	For Period	Debit	ul:DividendsReceivedAndCapitalReductionsInJV
1326	Share of net profit/(loss)	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod
1327	Share of net profit/(loss)	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
1328	Currency retranslation	Concept (Monetary)	For Period	Debit	ul:IncreaseDecreaseThroughNetExchangeDifferencesOnForeignCurrencyTranslationInJointVentures
1329	Currency retranslation	Concept (Monetary)	For Period	Debit	ul:IncreaseDecreaseThroughNetExchangeDifferencesOnForeignCurrencyTranslationInAssociates
1330	Ending balance	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentAssets
1331	1112 - Disclosure - Other Non-Current Assets - Movements in Interest in Joint Ventures and Associates (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureOtherNonCurrentAssetsMovementsInInterestInJointVenturesAndAssociatesParenthetical
1332	Disclosure Of Joint Ventures And Associates [Table]	Table	*	*	ul:DisclosureOfJointVenturesAndAssociatesTable
1333	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1334	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1335	Unilever FIMA LDA [member]	Member			ul:UnileverFimaLdaMember
1336	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1337	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1338	Joint ventures [member]	Member			ifrs-full:JointVenturesMember
1339	Disclosure Of Joint Ventures And Associates [Line Items]	LineItems			ul:DisclosureOfJointVenturesAndAssociatesLineItems
1340	Capital reduction in Joint venture	Concept (Monetary)	For Period	Debit	ul:CapitalReductionInJointVenture
1341	1113 - Disclosure - Other Non-current Assets - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureOtherNoncurrentAssetsAdditionalInformation
1342	Implied Table	Table	*	*	implied:Table
1343	Miscellaneous non-current assets [abstract]	Abstract			ifrs-full:MiscellaneousNoncurrentAssetsAbstract
1344	Contingent liabilities incurred in relation to interests in joint ventures	Concept (Monetary)	As Of	Credit	ifrs-full:ContingentLiabilitiesIncurredByVenturerInRelationToInterestsInJointVentures
1345	Contingent liabilities incurred in relation to interests in associates	Concept (Monetary)	As Of	Credit	ifrs-full:ContingentLiabilitiesIncurredInRelationToInterestsInAssociates
1346	Capital commitments to joint ventures	Concept (Monetary)	As Of	Credit	ifrs-full:CommitmentsInRelationToJointVentures
1347	1114 - Disclosure - Inventories - Summary of Inventories (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureInventoriesSummaryOfInventories
1348	Implied Table	Table	*	*	implied:Table
1349	Classes of current inventories [abstract]	Abstract			ifrs-full:ClassesOfInventoriesAbstract
1350	Raw materials and consumables	Concept (Monetary)	As Of	Debit	ul:CurrentRawMaterialsPackingAndOtherMaterialsAndWorkInProgressNetOfProvisions
1351	Finished goods and goods for resale	Concept (Monetary)	As Of	Debit	ifrs-full:FinishedGoods
1352	Total inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
1353	1115 - Disclosure - Inventories - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureInventoriesAdditionalInformation
1354	Implied Table	Table	*	*	implied:Table
1355	Classes of current inventories [abstract]	Abstract			ifrs-full:ClassesOfInventoriesAbstract
1356	Inventories carried at net realisable value	Concept (Monetary)	As Of	Debit	ifrs-full:InventoriesAtNetRealisableValue
1357	Damaged, obsolete and lost inventories	Concept (Monetary)	For Period		ifrs-full:InventoryWritedown2011
1358	Inventory provisions utilised or released to income statement	Concept (Monetary)	For Period	Debit	ul:InventoryProvisionsUtilisedOrReleased
1359	1116 - Disclosure - Trade and Other Current Receivables - Summary of Trade and Other Current Receivables (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTradeAndOtherCurrentReceivablesSummaryOfTradeAndOtherCurrentReceivables
1360	Implied Table	Table	*	*	implied:Table
1361	Trade and other current receivables [abstract]	Abstract			ifrs-full:TradeAndOtherCurrentReceivablesAbstract
1362	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
1363	Prepayments and accrued income	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentPrepaymentsAndCurrentAccruedIncome
1364	Other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentReceivables
1365	Total trade and other current receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivables
1366	1117 - Disclosure - Trade and Other Current Receivables - Summary of Trade and Other Current Receivables (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTradeAndOtherCurrentReceivablesSummaryOfTradeAndOtherCurrentReceivablesParenthetical
1367	Trade and Other Current Receivables [Table]	Table	*	*	ul:TradeAndOtherCurrentReceivablesTable
1368	Trade and other current receivables [axis]	Axis			ul:TradeAndOtherCurrentReceivablesAxis
1369	Trade and other current receivables [domain]	Member			ul:TradeAndOtherCurrentReceivablesDomain
1370	KKR [member]	Member			ul:KKRMember
1371	Trade and Other Current Receivables [Line Items]	LineItems			ul:TradeAndOtherCurrentReceivablesLineItems
1372	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
1373	1118 - Disclosure - Trade and Other Current Receivables - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTradeAndOtherCurrentReceivablesAdditionalInformation
1374	Trade and Other Current Receivables [Table]	Table	*	*	ul:TradeAndOtherCurrentReceivablesTable
1375	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1376	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1377	Financial asset [Member]	Member			ul:FinancialAssetMember
1378	Non Financial Asset [Member]	Member			ul:NonFinancialAssetMember
1379	Rebates Payable To Customers [Member]	Member			ul:RebatesPayableToCustomersMember
1380	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
1381	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
1382	Current trade receivables [member]	Member			ul:CurrentTradeReceivablesMember
1383	Other Current Receivables [member]	Member			ul:OtherCurrentReceivablesMember
1384	Non Current Trade And Other Receivables [Member]	Member			ul:NonCurrentTradeAndOtherReceivablesMember
1385	Trade and Other Current Receivables [Line Items]	LineItems			ul:TradeAndOtherCurrentReceivablesLineItems
1386	Other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentReceivables
1387	Current trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
1388	Impairment provision	Concept (Monetary)	As Of	Credit	ul:ProvisionForImpairmentOfTradeAndOtherReceivables
1389	1119 - Disclosure - Trade and Other Current Receivables - Summary of Aging of Trade Receivables (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTradeAndOtherCurrentReceivablesSummaryOfAgingOfTradeReceivables
1390	Aging Of Trade Receivables [Table]	Table	*	*	ul:AgingOfTradeReceivablesTable
1391	Past due status [axis]	Axis			ifrs-full:PastDueStatusAxis
1392	Past due status [member]	Member			ifrs-full:PastDueStatusMember
1393	Not overdue [Member]	Member			ul:NotOverDueMember
1394	Past due less than three months [Member]	Member			ul:PastDueLessThanThreeMonthsMember
1395	Past due more than three months but less than six months [Member]	Member			ul:PastDueMoreThanThreeMonthsButLessThanSixMonthsMember
1396	Past due more than six months but less than one year [Member]	Member			ul:PastDueMoreThanSixMonthsButLessThanOneYearMember
1397	Past due more than one year [Member]	Member			ul:PastDueMoreThanOneYearMember
1398	Aging Of Current Trade Receivables [line items]	LineItems			ul:AgingOfCurrentTradeReceivablesLineItems
1399	Total trade receivables	Concept (Monetary)	As Of	Debit	ul:GrossCurrentTradeReceivables
1400	Less impairment provision for trade receivables	Concept (Monetary)	As Of	Debit	ul:ImpairmentProvisionForCurrentTradeReceivables
1401	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
1402	1120 - Disclosure - Trade and Other Current Receivables - Summary of Impairment Provision for Trade and Other Receivables - Current and Non-Current Impairments (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTradeAndOtherCurrentReceivablesSummaryOfImpairmentProvisionForTradeAndOtherReceivablesCurrentAndNonCurrentImpairments
1403	Implied Table	Table	*	*	implied:Table
1404	Trade and other receivables [abstract]	Abstract			ifrs-full:TradeAndOtherReceivablesAbstract
1405	Beginning balance	Concept (Monetary)	As Of	Credit	ul:ProvisionForImpairmentOfTradeAndOtherReceivables
1406	Charge to income statement	Concept (Monetary)	For Period	Debit	ul:ImpairmentProvisionOfTradeAndOtherReceivablesChargeToIncomeStatement
1407	Reduction/releases	Concept (Monetary)	For Period	Debit	ul:ReductionOrReleaseOfImpairmentProvisionOfTradeAndOtherReceivables
1408	Currency translations	Concept (Monetary)	For Period	Debit	ul:CurrencyTranslationsOnImpairmentProvisionOfTradeAndOtherReceivables
1409	Ending balance	Concept (Monetary)	As Of	Credit	ul:ProvisionForImpairmentOfTradeAndOtherReceivables
1410	1121 - Disclosure - Trade Payables and Other Liabilities - Summary of Trade Payables and Other Liabilities (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTradePayablesAndOtherLiabilitiesSummaryOfTradePayablesAndOtherLiabilities
1411	Implied Table	Table	*	*	implied:Table
1412	Trade and other payables [abstract]	Abstract			ifrs-full:TradeAndOtherPayablesAbstract
1413	Current: due within one year	Abstract			ifrs-full:TradeAndOtherCurrentPayablesAbstract
1414	Trade payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
1415	Accruals	Concept (Monetary)	As Of	Credit	ifrs-full:AccrualsAndDeferredIncomeClassifiedAsCurrent
1416	Social security and sundry taxes	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax
1417	Deferred consideration	Concept (Monetary)	As Of	Credit	ul:DeferredConsiderationCurrent
1418	Others	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentPayables
1419	Trade and other current payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
1420	Non-current: due after more than one year	Abstract			ifrs-full:NoncurrentPayablesAbstract
1421	Accruals	Concept (Monetary)	As Of	Credit	ifrs-full:AccrualsAndDeferredIncomeClassifiedAsNoncurrent
1422	Deferred consideration	Concept (Monetary)	As Of	Credit	ul:DeferredConsiderationNonCurrent
1423	Others	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentPayables
1424	Non current payables	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPayables
1425	Total trade	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayables
1426	1122 - Disclosure - Trade Payables and Other Liabilities - Summary of Trade Payables and Other Liabilities (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTradePayablesAndOtherLiabilitiesSummaryOfTradePayablesAndOtherLiabilitiesParenthetical
1427	Disclosure of trade and other payables [Table]	Table	*	*	ul:DisclosureOfTradeAndOtherPayablesTable
1428	Trade and other current payables [axis]	Axis			ul:TradeAndOtherCurrentPayablesAxis
1429	Trade and other current payables [domain]	Member			ul:TradeAndOtherCurrentPayablesDomain
1430	KKR [member]	Member			ul:KKRMember
1431	Disclosure of trade and other payables [Line Items]	LineItems			ul:DisclosureOfTradeAndOtherPayablesLineItems
1432	Trade payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
1433	1123 - Disclosure - Trade Payables and Other Liabilities - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTradePayablesAndOtherLiabilitiesAdditionalInformation
1434	Disclosure of trade and other payables [Table]	Table	*	*	ul:DisclosureOfTradeAndOtherPayablesTable
1435	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
1436	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
1437	Blueair [member]	Member			ul:BlueairMember
1438	Disclosure of trade and other liabilities [line items]	LineItems			ul:DisclosureOfTradeAndOtherLiabilitiesLineItems
1439	Deferred consideration	Concept (Monetary)	As Of	Credit	ul:DeferredConsiderationForAcquisitionsDiscountedValue
1440	Balance for deferred contingent consideration	Concept (Monetary)	As Of	Credit	ul:DeferredContingentConsiderationForAcquisitionsDiscountedValue
1441	Maximum possible total payment	Concept (Monetary)	As Of	Credit	ul:DeferredContingentConsiderationForAcquisitionsMaximumPossiblePaymentUntil2024
1442	Non-cash credit to operating profit	Concept (Monetary)	For Period	Credit	ul:CreditFromEarlySettlementOfContingentConsiderationBlueair
1443	cash payment for contingent consideration	Concept (Monetary)	For Period	Credit	ul:CashPaymentFromEarlySettlementOfContingentConsiderationBlueair
1444	1124 - Disclosure - Capital and Funding - Summary of Share Capital (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingSummaryOfShareCapital
1445	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
1446	Parent Companies of the Group [axis]	Axis			ul:ParentCompaniesOfTheGroupAxis
1447	Parent Companies of the Group [Domain]	Member			ul:ParentCompaniesOfTheGroupDomain
1448	Unilever PLC [member]	Member			ul:UnileverPLCMember
1449	Unilever N.V. [member]	Member			ul:UnileverNVMember
1450	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
1451	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
1452	Ordinary Shares [member]	Member			ifrs-full:OrdinarySharesMember
1453	Ordinary Special Shares [member]	Member			ul:OrdinarySpecialSharesMember
1454	Internal Holdings Eliminated on Consolidation [Member]	Member			ul:InternalHoldingsEliminatedOnConsolidationMember
1455	Deferred Stock [Member]	Member			ul:DeferredStockMember
1456	Cancellation of Treasury shares [member]	Member			ul:CancellationOfTreasurySharesMember
1457	Disclosure of classes of share capital [line items]	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1458	Issued, called up and fully paid	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
1459	Authorised	Concept (Monetary)	As Of	Credit	ul:AuthorisedCapital
1460	1125 - Disclosure - Capital and Funding - Summary of Share Capital (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingSummaryOfShareCapitalParenthetical
1461	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
1462	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
1463	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
1464	Ordinary Shares [member]	Member			ifrs-full:OrdinarySharesMember
1465	Ordinary Special Shares [member]	Member			ul:OrdinarySpecialSharesMember
1466	Deferred Stock [Member]	Member			ul:DeferredStockMember
1467	Special Shares [Member]	Member			ul:SpecialSharesMember
1468	Parent Companies of the Group [axis]	Axis			ul:ParentCompaniesOfTheGroupAxis
1469	Parent Companies of the Group [Domain]	Member			ul:ParentCompaniesOfTheGroupDomain
1470	Unilever PLC [member]	Member			ul:UnileverPLCMember
1471	Unilever N.V. [member]	Member			ul:UnileverNVMember
1472	Disclosure of classes of share capital [line items]	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1473	Par value per share	Concept (Share)	As Of		ifrs-full:ParValuePerShare
1474	Number of authorised shares	Concept (Shares)	As Of		ifrs-full:NumberOfSharesAuthorised
1475	Number of shares issued	Concept (Shares)	As Of		ifrs-full:NumberOfSharesIssued
1476	Cancellation of shares	Concept (Shares)	For Period		ul:CancelledShares
1477	Treasury shares	Concept (Shares)	As Of		ul:NumberOfTreasuryShares
1478	Conversion rate for ordinary shares nominal value	Concept (Share)	For Period		ul:PLCSharePriceConversionRateToEuro
1479	Description of conversion of currency	Concept (Text/String)	For Period		ul:DescriptionOfConversionOfCurrency
1480	1126 - Disclosure - Capital and funding - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingAdditionalInformation
1481	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
1482	Parent Companies of the Group [axis]	Axis			ul:ParentCompaniesOfTheGroupAxis
1483	Parent Companies of the Group [Domain]	Member			ul:ParentCompaniesOfTheGroupDomain
1484	Unilever N.V. [member]	Member			ul:UnileverNVMember
1485	Unilever PLC [member]	Member			ul:UnileverPLCMember
1486	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
1487	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
1488	Ordinary Shares [member]	Member			ifrs-full:OrdinarySharesMember
1489	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1490	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1491	Share Based Compensation [Member]	Member			ul:ShareBasedCompensationMember
1492	Disclosure of classes of share capital [line items]	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1493	Nominal dividend paid on the deferred stock of PLC	Concept (Percent)	For Period		ul:NominalDividendPaidOnTheDeferredStockOfPLC
1494	Number of shares acquired	Concept (Shares)	For Period		ul:NumberOfSharesAcquiredDuringThePeriod
1495	Number of treasury shares held	Concept (Shares)	As Of		ul:NumberOfTreasurySharesHeld
1496	Number of treasury shares held	Concept (Shares)	As Of		ifrs-full:SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates
1497	Number of shares cancelled	Concept (Shares)	For Period		ul:CancelledShares
1498	1127 - Disclosure - Capital and Funding - Subsidiaries With Significant Non-Controlling Interests (HUL) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingSubsidiariesWithSignificantNonControllingInterestsHUL
1499	Significant Non Controlling Interests [Table]	Table	*	*	ul:SignificantNonControllingInterestsTable
1500	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1501	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1502	Subsidiaries with material non-controlling interests [member]	Member			ifrs-full:SubsidiariesWithMaterialNoncontrollingInterestsMember
1503	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1504	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1505	Hindustan Unilever Limited [Member]	Member			ul:HindustanUnileverLimitedMember
1506	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
1507	Equity [member]	Member			ifrs-full:EquityMember
1508	Non-controlling Interests [member]	Member			ifrs-full:NoncontrollingInterestsMember
1509	Significant Non Controlling Interests [Line Items]	LineItems			ul:SignificantNonControllingInterestsLineItems
1510	Beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1511	Non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
1512	Current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
1513	Total current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
1514	Total non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
1515	Turnover	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
1516	Profit after tax	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
1517	Other comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
1518	Total comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
1519	Dividend paid to the non-controlling interest	Concept (Monetary)	For Period	Credit	ifrs-full:DividendsPaidToNoncontrollingInterests
1520	Net increase/(decrease) in cash and cash-equivalents	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
1521	Other changes in equity	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity
1522	Currency translation	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax
1523	Ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1524	1128 - Disclosure - Capital and Funding - Summary of Consolidated Statement of Changes in Equity: Analysis of Other Reserves (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingSummaryOfConsolidatedStatementOfChangesInEquityAnalysisOfOtherReserves
1525	Implied Table	Table	*	*	implied:Table
1526	Disclosure of reserves within equity [abstract]	Abstract			ifrs-full:DisclosureOfReservesWithinEquityAbstract
1527	Fair value reserves	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfGainsAndLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
1528	Equity instruments	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfGainsAndLossesFromInvestmentsInEquityInstruments
1529	Cash flow hedges	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfCashFlowHedges
1530	Available-for-sale financial assets	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssets
1531	Currency retranslation of group companies - see following table	Concept (Monetary)	As Of	Credit	ul:ReserveOfCurrencyRetranslationOfGroupCompanies
1532	Adjustment on translation of PLC's ordinary capital at 31/9p = �0.16	Concept (Monetary)	As Of	Credit	ul:ReserveOfAdjustmentOnTranslationOfOrdinaryShares
1533	Capital redemption reserve	Concept (Monetary)	As Of	Credit	ifrs-full:CapitalRedemptionReserve
1534	Book value of treasury shares - see following table	Concept (Monetary)	As Of	Debit	ifrs-full:TreasuryShares
1535	Hedging gains/(losses) transferred to non-financial assets(a)	Concept (Monetary)	For Period	Credit	ul:HedgingGainLossTransferredToNonfinancialAssets
1536	Other	Concept (Monetary)	As Of	Credit	ul:OtherMiscellaneousReserves
1537	Other reserves	Concept (Monetary)	As Of	Credit	ifrs-full:OtherReserves
1538	1129 - Disclosure - Capital and Funding - Summary of Consolidated Statement of Changes in Equity: Analysis of Other Reserves (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingSummaryOfConsolidatedStatementOfChangesInEquityAnalysisOfOtherReservesParenthetical
1539	Disclosure of reserves within equity [table]	Table	*	*	ifrs-full:DisclosureOfReservesWithinEquityTable
1540	Parent Companies of the Group [axis]	Axis			ul:ParentCompaniesOfTheGroupAxis
1541	Parent Companies of the Group [Domain]	Member			ul:ParentCompaniesOfTheGroupDomain
1542	Unilever N.V. [member]	Member			ul:UnileverNVMember
1543	Unilever PLC [member]	Member			ul:UnileverPLCMember
1544	Disclosure of reserves within equity [line items]	LineItems			ifrs-full:DisclosureOfReservesWithinEquityLineItems
1545	Par value per share	Concept (Share)	As Of		ifrs-full:ParValuePerShare
1546	1130 - Disclosure - Capital and Funding - Summary of Treasury Shares Movements (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingSummaryOfTreasurySharesMovements
1547	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
1548	Parent Companies of the Group [axis]	Axis			ul:ParentCompaniesOfTheGroupAxis
1549	Parent Companies of the Group [Domain]	Member			ul:ParentCompaniesOfTheGroupDomain
1550	Unilever PLC [member]	Member			ul:UnileverPLCMember
1551	Disclosure of classes of share capital [line items]	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1552	1 January	Concept (Monetary)	As Of	Debit	ifrs-full:TreasuryShares
1553	Repurchase of shares (see note 24)	Concept (Monetary)	For Period	Credit	ul:RepurchaseOfShares
1554	Cancellation of NV and PLC shares	Concept (Monetary)	For Period	Debit	ul:SharesCancelled
1555	Other purchases and utilisations	Concept (Monetary)	For Period	Debit	ul:OtherPurchasesAndUtilisationsOfTreasuryShares
1556	31 December	Concept (Monetary)	As Of	Debit	ifrs-full:TreasuryShares
1557	1131 - Disclosure - Capital and Funding - Summary of Currency Retranslation Reserve (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingSummaryOfCurrencyRetranslationReserve
1558	Implied Table	Table	*	*	implied:Table
1559	Movement in foreign currency translation reserve [abstract]	Abstract			ul:MovementInForeignCurrencyTranslationReserveAbstract
1560	Currency retranslation reserve beginning balance	Concept (Monetary)	As Of	Credit	ul:ReserveOfCurrencyRetranslationOfGroupCompanies
1561	Currency retranslation during the year	Concept (Monetary)	For Period	Credit	ul:ReserveOfCurrencyRetranslationMovement
1562	Movement in net investment hedges and exchange differences in net investments in foreign operations	Concept (Monetary)	For Period	Credit	ul:GainLossInNetInvestmentHedgesAndExchangeDifferencesInNetInvestmentsInForeignOperations
1563	Recycled to income statement	Concept (Monetary)	For Period	Debit	ul:FairValueMovementsOnAvailableForSaleInvestmentsRecycledToIncomeStatementGroup
1564	Currency retranslation reserve ending balance	Concept (Monetary)	As Of	Credit	ul:ReserveOfCurrencyRetranslationOfGroupCompanies
1565	1132 - Disclosure - Capital and Funding - Summary of Comprehensive Income: Other Comprehensive Income Reconciliation (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingSummaryOfComprehensiveIncomeOtherComprehensiveIncomeReconciliation
1566	Implied Table	Table	*	*	implied:Table
1567	Disclosure of analysis of other comprehensive income by item [abstract]	Abstract			ifrs-full:DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemAbstract
1568	Fair value gains/(losses) beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfGainsAndLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
1569	Equity instruments	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments
1570	Cash flow hedges	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxCashFlowHedges
1571	Available for sale financial assets	Concept (Monetary)	For Period	Credit	ul:OtherComprehensiveIncomeMovementsInGainsOrLossesFromAvailableForSaleFinancialAssets
1572	Fair value gains/(losses) ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfGainsAndLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
1573	Remeasurement of defined benefit pension plans beginning balance	Concept (Monetary)	As Of	Credit	ul:RemeasurementOfDefinedBenefitPensionPlansNetOfTax
1574	Movement during the year	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
1575	Remeasurement of defined benefit pension plans ending balance	Concept (Monetary)	As Of	Credit	ul:RemeasurementOfDefinedBenefitPensionPlansNetOfTax
1576	Currency retranslation gains/(losses) beginning balance	Concept (Monetary)	As Of	Credit	ul:CurrencyRetranslationValue
1577	Other reserves	Concept (Monetary)	For Period	Credit	ul:CurrencyRetranslationMovementOtherReserves
1578	Retained profit	Concept (Monetary)	For Period	Credit	ul:CurrencyRetranslationMovementRetainedProfit
1579	Non-controlling interest	Concept (Monetary)	For Period	Credit	ul:CurrencyRetranslationMovementNoncontrollingInterest
1580	Currency retranslation gains/(losses) ending balance	Concept (Monetary)	As Of	Credit	ul:CurrencyRetranslationValue
1581	1133 - Disclosure - Capital and Funding - Summary of Financial Liabilities (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingSummaryOfFinancialLiabilities
1582	Implied Table	Table	*	*	implied:Table
1583	Disclosure of financial liabilities [abstract]	Abstract			ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
1584	Bank loans and overdrafts, Current	Concept (Monetary)	As Of	Credit	ul:CurrentPortionOfBankLoansReceived
1585	Bonds and other loans, Current	Concept (Monetary)	As Of	Credit	ul:CurrentPortionOfNoncurrentBondsIssued
1586	Finance lease creditors, Current	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentFinanceLeaseLiabilities
1587	Derivatives, Current	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentDerivativeFinancialLiabilities
1588	Other financial liabilities, Current	Concept (Monetary)	As Of	Credit	ifrs-full:OtherFinancialLiabilities
1589	Current financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentFinancialLiabilities
1590	Bank loans and overdrafts, Non-current	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPortionOfNoncurrentLoansReceived
1591	Bonds and other loans, Non-current	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPortionOfNoncurrentBondsIssued
1592	Finance lease creditors, Non-current	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentFinanceLeaseLiabilities
1593	Derivatives, Non-current	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentDerivativeFinancialLiabilities
1594	Other financial liabilities, Non-current	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentFinancialLiabilities
1595	Non-current financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentFinancialLiabilities
1596	Bank loans and overdrafts	Concept (Monetary)	As Of	Credit	ifrs-full:LoansReceived
1597	Bonds and other loans	Concept (Monetary)	As Of	Credit	ifrs-full:BondsIssued
1598	Finance lease creditors	Concept (Monetary)	As Of	Credit	ifrs-full:FinanceLeaseLiabilities
1599	Derivatives	Concept (Monetary)	As Of	Credit	ifrs-full:DerivativeFinancialLiabilities
1600	Other financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentLiabilities
1601	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
1602	1134 - Disclosure - Capital and Funding - Summary of Financial Liabilities (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingSummaryOfFinancialLiabilitiesParenthetical
1603	Implied Table	Table	*	*	implied:Table
1604	Disclosure of financial liabilities [abstract]	Abstract			ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
1605	Secured liabilities	Concept (Monetary)	As Of	Credit	ul:SecuredLiabilities
1606	1135 - Disclosure - Capital and Funding - Reconciliation of Liabilities Arising from Financing Activities (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingReconciliationOfLiabilitiesArisingFromFinancingActivities
1607	Disclosure of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFinancialLiabilitiesTable
1608	Types of financial liabilities [axis]	Axis			ifrs-full:TypesOfFinancialLiabilitiesAxis
1609	Financial liabilities, type [member]	Member			ifrs-full:FinancialLiabilitiesTypeMember
1610	Bank Loans and Overdrafts [Member]	Member			ul:BankLoansAndOverdraftsMember
1611	Bonds and Other Loans [Member]	Member			ul:BondsAndOtherLoansMember
1612	Finance lease creditors [Member]	Member			ul:FinanceLeaseCreditorsMember
1613	Derivatives [Member]	Member			ul:DerivativeLiabilitiesMember
1614	Other Financials Liabilities [member]	Member			ul:OtherFinancialsLiabilitiesMember
1615	Preferred Shares Liabilities [Member]	Member			ul:PreferredSharesLiabilitiesMember
1616	Disclosure of financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1617	Opening balance	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
1618	Cash Movement	Concept (Monetary)	For Period	Credit	ul:CashAdjustmentsInFinancialLiabilities
1619	Business acquisitions/ disposals	Concept (Monetary)	For Period	Credit	ul:AdjustmentsDueToBusinessAcquisitionsOrDisposals
1620	Foreign exchange changes	Concept (Monetary)	For Period	Credit	ul:AdjustmentsDueToForeignExchangeChanges
1621	Fair value changes	Concept (Monetary)	For Period	Credit	ul:AdjustmentForFairValueChanges
1622	Other movements	Concept (Monetary)	For Period	Debit	ul:AdjustmentForOtherNonCashMovements
1623	Closing balance	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
1624	1136 - Disclosure - Capital and Funding - Reconciliation of Liabilities Arising from Financing Activities (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingReconciliationOfLiabilitiesArisingFromFinancingActivitiesParenthetical
1625	Disclosure of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFinancialLiabilitiesTable
1626	Types of financial liabilities [axis]	Axis			ifrs-full:TypesOfFinancialLiabilitiesAxis
1627	Financial liabilities, type [member]	Member			ifrs-full:FinancialLiabilitiesTypeMember
1628	Overdrafts [member]	Member			ul:OverdraftsMember
1629	Disclosure of financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1630	Cash movement	Concept (Monetary)	For Period	Credit	ul:CashAdjustmentsInFinancialLiabilities
1631	1137 - Disclosure - Capital and Funding - Summary of Analysis of Bonds and Other Loans (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingSummaryOfAnalysisOfBondsAndOtherLoans
1632	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1633	Parent Companies of the Group [axis]	Axis			ul:ParentCompaniesOfTheGroupAxis
1634	Parent Companies of the Group [Domain]	Member			ul:ParentCompaniesOfTheGroupDomain
1635	Unilever PLC [member]	Member			ul:UnileverPLCMember
1636	Unilever N.V. [member]	Member			ul:UnileverNVMember
1637	Other Group Companies [member]	Member			ul:OtherGroupCompaniesMember
1638	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1639	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1640	Switzerland [Member]	Member			country:CH
1641	United States [member]	Member			country:US
1642	Other Countries [Member]	Member			ul:OtherCountriesMember
1643	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
1644	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
1645	Floating Interest Rate [Member]	Member			ifrs-full:FloatingInterestRateMember
1646	Currency [Axis]	Axis			us-gaap:CurrencyAxis
1647	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1648	Euro [Member]	Member			currency:EUR
1649	United Kingdom, Pounds [Member]	Member			currency:GBP
1650	United States of America, Dollars [Member]	Member			currency:USD
1651	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1652	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1653	Floating Rate Notes 2018 [Member]	Member			ul:NotesTwoThousandEighteenMember
1654	1.750% Bonds 2020 [Member]	Member			ul:OnePointSevenFiveZeroPercentageBondsTwoThousandTwentyMemberMember
1655	0.500% Notes 2022 [Member]	Member			ul:ZeroPointFiveZeroZeroPercentageNotesTwoThousandTwentyTwoMember
1656	1.375% Notes 2029 [member]	Member			ul:OnePointThreeSevenFivePercentageBondsTwoThousandTwentyNineMember
1657	1.125% Bonds 2028 [Member]	Member			ul:OnePointOneTwoFivePercentageBondsTwoThousandTwentyEightMember
1658	0.875% Notes 2025 [member]	Member			ul:ZeroPointEightSevenFivePercentageBondsTwoThousandTwentyFiveMember
1659	0.375% Notes 2023 [member]	Member			ul:ZeroPointThreeSevenFivePercentageBondsTwoThousandTwentyThreeMember
1660	1.000% Notes 2027 [member]	Member			ul:OnePointZeroZeroZeroPercentageNotesTwoThousandTwentySevenMember
1661	1.000% Notes 2023 [member]	Member			ul:OnePointZeroPercentageNotesTwoThousandTwentyThreeMember
1662	0.000% Notes 2021 [member]	Member			ul:ZeroPointZeroZeroZeroPercentageNotesTwoThousandTwentyOneMember
1663	0.500% Notes 2024 [Member]	Member			ul:ZeroPointFiveZeroZeroPercentageNotesTwoThousandTwentyFourMember
1664	0.000% Notes 2020 [Member]	Member			ul:ZeroPointZeroZeroZeroPercentageNotesTwoThousandTwentyMember
1665	Commercial Paper [Member]	Member			ul:CommercialPaper1Member
1666	Bonds and Other Loans [Member]	Member			ul:BondsAndOtherLoansMember
1667	1.125% Notes 2022 [member]	Member			ul:OnePointOneTwoFivePercentageBondsTwoThousandTwentyTwoMember
1668	2.000% Notes 2018 [Member]	Member			ul:TwoPointZeroZeroZeroPercentageNotesTwoThousandEighteenMember
1669	1.375% Notes 2024 [member]	Member			ul:OnePointThreeSevenFivePercentageBondsTwoThousandTwentyFourMember
1670	1.875% Notes 2029 [member]	Member			ul:OnePointEightSevenFivePercentageBondsTwoThousandTwentyNineMember
1671	Other Loans [Member]	Member			ul:OtherLoansMember
1672	4.250% Notes 2021 [Member]	Member			ul:FourPointTwoFiveZeroPercentageNotesTwoThousandTwentyOneMember
1673	5.900% Bonds 2032 [Member]	Member			ul:FivePointNineZeroZeroPercentageBondsTwoThousandThirtyTwoMember
1674	2.900% Notes 2027 [member]	Member			ul:TwoPointNineZeroZeroPercentageNotesTwoThousandTwentySevenMember
1675	2.200% Notes 2022 [member]	Member			ul:TwoPointTwoZeroZeroPercentageNotesTwoThousandTwentyTwoMember
1676	1.800% Notes 2020 [member]	Member			ul:OnePointEightZeroZeroPercentageNotesTwoThousandTwentyMember
1677	4.800% Bonds 2019 [Member]	Member			ul:FourPointEightZeroZeroPercentageBondsTwoThousandNineteenMember
1678	2.200% Notes 2019 [Member]	Member			ul:TwoPointTwoZeroZeroPercentageNotesTwoThousandNineteenMember
1679	2.000% Notes 2026 [Member]	Member			ul:TwoPointZeroZeroZeroPercentageNotesTwoThousandTwentySixMember
1680	1.375% Notes 2021 [Member]	Member			ul:OnePointThreeSevenFivePercentageNotesTwoThousandTwentyOneMember
1681	2.100% Notes 2020 [Member]	Member			ul:TwoPointOneZeroZeroPercentageNotesTwoThousandTwentyMember
1682	3.100% Notes 2025 [Member]	Member			ul:ThreePointOneZeroZeroPercentageNotesTwoThousandTwentyFiveMember
1683	2.600% Notes 2024 [member]	Member			ul:TwoPointSixZeroZeroPercentageNotesTwoThousandTwentyFourMember
1684	7.250% Bonds 2026 [Member]	Member			ul:SevenPointTwoFiveZeroPercentageBondsTwoThousandTwentySixMember
1685	6.625% Bonds 2028 [Member]	Member			ul:SixPointSixTwoFivePercentageBondsTwoThousandTwentyEightMember
1686	5.150% Notes 2020 [Member]	Member			ul:FivePointOneFiveZeroPercentageNotesTwoThousandTwentyMember
1687	5.600% Bonds 2097 [Member]	Member			ul:FivePointSixZeroZeroPercentageBondsTwoThousandNinetySevenMember
1688	0.500% Bonds 2025 [member]	Member			ul:ZeroPointFiveZeroZeroPercentageBondsTwoThousandTwentyFiveMember
1689	1.375% Notes 2030 [member]	Member			ul:OnePointThreeSevenFivePercentageNotesTwoThousandThirtyMember
1690	0.50% Notes 2023 [member]	Member			ul:ZeroPointFivePercentageNotesTwoThousandTwentyThreeMember
1691	3.500% Notes 2028 [member]	Member			ul:ThreePointFiveZeroZeroPercentageNotesTwoThousandTwentyEightMember
1692	3.125% Notes 2023 [member]	Member			ul:ThreePointOneTwoFivePercentageNotesTwoThousandTwentyThreeMember
1693	1.625% Notes 2033 [member]	Member			ul:OnePointSixTwoFivePercentageNotesTwoThousandThirtyThreeMemberMember
1694	3.000% Notes 2022 [member]	Member			ul:ThreePointZeroZeroZeroPercentageNotesTwoThousandTwentyTwoMember
1695	1.125% Bonds 2027 [member]	Member			ul:OnePointOneTwoFivePercentageBondsTwoThousandTwentySevenMember
1696	3.250% Notes 2024 [member]	Member			ul:ThreePointTwoFiveZeroPercentageNotesTwoThousandTwentyFourMember
1697	3.500% Bonds 2028 [member]	Member			ul:ThreePointFiveZeroZeroPercentageBondsTwoThousandTwentyEightMember
1698	2.750% Bonds 2021 [member]	Member			ul:TwoPointSevenFiveZeroPercentageBondsTwoThousandTwentyOneMember
1699	3.375% Notes 2025 [member]	Member			ul:ThreePointThreeSevenFivePercentageNotesTwoThousandTwentyFiveMember
1700	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1701	Borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1702	Total bonds and other loans	Concept (Monetary)	As Of	Credit	ul:BondsAndOtherLoans
1703	1138 - Disclosure - Capital and Funding - Summary of Analysis of Bonds and Other Loans (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCapitalAndFundingSummaryOfAnalysisOfBondsAndOtherLoansParenthetical
1704	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1705	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1706	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1707	2.000% Notes [Member]	Member			ul:TwoPointZeroZeroZeroPercentageNotesMember
1708	1.750% Bonds 2020 [Member]	Member			ul:OnePointSevenFiveZeroPercentageBondsTwoThousandTwentyMemberMember
1709	0.500% Notes 2022 [Member]	Member			ul:ZeroPointFiveZeroZeroPercentageNotesTwoThousandTwentyTwoMember
1710	1.375% Notes 2029 [member]	Member			ul:OnePointThreeSevenFivePercentageBondsTwoThousandTwentyNineMember
1711	1.125% Bonds 2028 [Member]	Member			ul:OnePointOneTwoFivePercentageBondsTwoThousandTwentyEightMember
1712	0.875% Notes 2025 [member]	Member			ul:ZeroPointEightSevenFivePercentageBondsTwoThousandTwentyFiveMember
1713	0.375% Notes 2023 [member]	Member			ul:ZeroPointThreeSevenFivePercentageBondsTwoThousandTwentyThreeMember
1714	1.000% Notes 2027 [member]	Member			ul:OnePointZeroZeroZeroPercentageNotesTwoThousandTwentySevenMember
1715	1.000% Notes 2023 [member]	Member			ul:OnePointZeroPercentageNotesTwoThousandTwentyThreeMember
1716	0.000% Notes 2021 [member]	Member			ul:ZeroPointZeroZeroZeroPercentageNotesTwoThousandTwentyOneMember
1717	0.500% Notes 2024 [Member]	Member			ul:ZeroPointFiveZeroZeroPercentageNotesTwoThousandTwentyFourMember
1718	0.000% Notes 2020 [Member]	Member			ul:ZeroPointZeroZeroZeroPercentageNotesTwoThousandTwentyMember
1719	1.125% Notes 2022 [member]	Member			ul:OnePointOneTwoFivePercentageBondsTwoThousandTwentyTwoMember
1720	2.000% Notes 2018 [Member]	Member			ul:TwoPointZeroZeroZeroPercentageNotesTwoThousandEighteenMember
1721	1.375% Notes 2024 [member]	Member			ul:OnePointThreeSevenFivePercentageBondsTwoThousandTwentyFourMember
1722	1.875% Notes 2029 [member]	Member			ul:OnePointEightSevenFivePercentageBondsTwoThousandTwentyNineMember
1723	4.250% Notes 2021 [Member]	Member			ul:FourPointTwoFiveZeroPercentageNotesTwoThousandTwentyOneMember
1724	5.900% Bonds 2032 [Member]	Member			ul:FivePointNineZeroZeroPercentageBondsTwoThousandThirtyTwoMember
1725	2.900% Notes 2027 [member]	Member			ul:TwoPointNineZeroZeroPercentageNotesTwoThousandTwentySevenMember
1726	2.200% Notes 2022 [member]	Member			ul:TwoPointTwoZeroZeroPercentageNotesTwoThousandTwentyTwoMember
1727	1.800% Notes 2020 [member]	Member			ul:OnePointEightZeroZeroPercentageNotesTwoThousandTwentyMember
1728	4.800% Bonds 2019 [Member]	Member			ul:FourPointEightZeroZeroPercentageBondsTwoThousandNineteenMember
1729	2.200% Notes 2019 [Member]	Member			ul:TwoPointTwoZeroZeroPercentageNotesTwoThousandNineteenMember
1730	2.000% Notes 2026 [Member]	Member			ul:TwoPointZeroZeroZeroPercentageNotesTwoThousandTwentySixMember
1731	1.375% Notes 2021 [Member]	Member			ul:OnePointThreeSevenFivePercentageNotesTwoThousandTwentyOneMember
1732	2.100% Notes 2020 [Member]	Member			ul:TwoPointOneZeroZeroPercentageNotesTwoThousandTwentyMember
1733	3.100% Notes 2025 [Member]	Member			ul:ThreePointOneZeroZeroPercentageNotesTwoThousandTwentyFiveMember
1734	2.600% Notes 2024 [member]	Member			ul:TwoPointSixZeroZeroPercentageNotesTwoThousandTwentyFourMember
1735	7.250% Bonds 2026 [Member]	Member			ul:SevenPointTwoFiveZeroPercentageBondsTwoThousandTwentySixMember
1736	6.625% Bonds 2028 [Member]	Member			ul:SixPointSixTwoFivePercentageBondsTwoThousandTwentyEightMember
1737	5.150% Notes 2020 [Member]	Member			ul:FivePointOneFiveZeroPercentageNotesTwoThousandTwentyMember
1738	5.600% Bonds 2097 [Member]	Member			ul:FivePointSixZeroZeroPercentageBondsTwoThousandNinetySevenMember
1739	0.500% Bonds 2025 [member]	Member			ul:ZeroPointFiveZeroZeroPercentageBondsTwoThousandTwentyFiveMember
1740	1.375% Notes 2030 [member]	Member			ul:OnePointThreeSevenFivePercentageNotesTwoThousandThirtyMember
1741	0.50% Notes 2023 [member]	Member			ul:ZeroPointFivePercentageNotesTwoThousandTwentyThreeMember
1742	3.500% Notes 2028 [member]	Member			ul:ThreePointFiveZeroZeroPercentageNotesTwoThousandTwentyEightMember
1743	3.125% Notes 2023 [member]	Member			ul:ThreePointOneTwoFivePercentageNotesTwoThousandTwentyThreeMember
1744	1.625% Notes 2033 [member]	Member			ul:OnePointSixTwoFivePercentageNotesTwoThousandThirtyThreeMemberMember
1745	3.000% Notes 2022 [member]	Member			ul:ThreePointZeroZeroZeroPercentageNotesTwoThousandTwentyTwoMember
1746	1.125% Bonds 2027 [member]	Member			ul:OnePointOneTwoFivePercentageBondsTwoThousandTwentySevenMember
1747	3.250% Notes 2024 [member]	Member			ul:ThreePointTwoFiveZeroPercentageNotesTwoThousandTwentyFourMember
1748	3.500% Bonds 2028 [member]	Member			ul:ThreePointFiveZeroZeroPercentageBondsTwoThousandTwentyEightMember
1749	2.750% Bonds 2021 [member]	Member			ul:TwoPointSevenFiveZeroPercentageBondsTwoThousandTwentyOneMember
1750	3.375% Notes 2025 [member]	Member			ul:ThreePointThreeSevenFivePercentageNotesTwoThousandTwentyFiveMember
1751	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1752	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1753	United States [member]	Member			country:US
1754	Parent Companies of the Group [axis]	Axis			ul:ParentCompaniesOfTheGroupAxis
1755	Parent Companies of the Group [Domain]	Member			ul:ParentCompaniesOfTheGroupDomain
1756	Unilever PLC [member]	Member			ul:UnileverPLCMember
1757	Unilever N.V. [member]	Member			ul:UnileverNVMember
1758	Other Group Companies [member]	Member			ul:OtherGroupCompaniesMember
1759	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1760	Borrowings interest rate	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
1761	Borrowings maturity year	Concept (Year)	For Period		ul:BorrowingsMaturityYear
1762	Fair value hedge adjustment	Concept (Monetary)	As Of	Credit	ifrs-full:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities
1763	1139 - Disclosure - Treasury Risk Management - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTreasuryRiskManagementAdditionalInformation
1764	Disclosure Of Treasury Risk Management [Table]	Table	*	*	ul:DisclosureOfTreasuryRiskManagementTable
1765	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
1766	Risks [member]	Member			ifrs-full:TypesOfRisksMember
1767	Currency risk [Member]	Member			ifrs-full:CurrencyRiskMember
1768	Interest rate risk [Member]	Member			ifrs-full:InterestRateRiskMember
1769	Commodity price risk [Member]	Member			ifrs-full:CommodityPriceRiskMember
1770	Types of hedges [axis]	Axis			ifrs-full:TypesOfHedgesAxis
1771	Hedges [member]	Member			ifrs-full:TypesOfHedgesMember
1772	Ten percentage strengthening against other currencies [member]	Member			ul:TenPercentageStrengtheningAgainstOtherCurrenciesMember
1773	Ten percentage weakening against other currencies [member]	Member			ul:TenPercentageWeakeningAgainstOtherCurrenciesMember
1774	Ten percentage strengthening against US Dollar [member]	Member			ul:TenPercentageStrengtheningAgainstUSDollarMember
1775	Ten percentage weakening against US Dollar [member]	Member			ul:TenPercentageWeakeningAgainstUsDollarMember
1776	Ten Percentage Increase in Commodity Price Risk [Member]	Member			ul:TenPercentageIncreaseInCommodityPriceRiskMember
1777	Ten Percentage Decrease in Commodity Price Risk [Member]	Member			ul:TenPercentageDecreaseInCommodityPriceRiskMember
1778	Ten percentage strengthening of EUR against key currency exposures [Member]	Member			ul:TenPercentageStrengtheningOfEurAgainstKeyCurrencyExposuresMember
1779	Ten percentage weakening of EUR against key currency exposures [Member]	Member			ul:TenPercentageWeakeningOfEurAgainstKeyCurrencyExposuresMember
1780	Impact on equity trade related cash flow hedges [member]	Member			ul:ImpactOnEquityTradeRelatedCashFlowHedgesMember
1781	Impact on equity net investment hedges [member]	Member			ul:ImpactOnEquityNetInvestmentHedgesMember
1782	Impact on equity net investment [member]	Member			ul:ImpactOnEquityNetInvestmentMember
1783	One percentage strengthening of floating interest rate [member]	Member			ul:OnePercentageStrengtheningOfFloatingInterestRateMember
1784	One percentage weakening in floating interest rate [member]	Member			ul:OnePercentageWeakeningInFloatingInterestRateMember
1785	Creation date [axis]	Axis			ifrs-full:CreationDateAxis
1786	Default financial statements date [member]	Member			ifrs-full:DefaultFinancialStatementsDateMember
1787	2019 [Member]	Member			ul:TwoThousandNineteenMember
1788	2020 [Member]	Member			ul:TwoThousandAndTwentyMember
1789	2018 [Member]	Member			ul:TwoThousandEighteenMember
1790	Currency [Axis]	Axis			us-gaap:CurrencyAxis
1791	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1792	United States of America, Dollars [Member]	Member			currency:USD
1793	Switzerland, Francs [Member]	Member			currency:CHF
1794	Disclosure Of Treasury Risk Management [Line Items]	LineItems			ul:DisclosureOfTreasuryRiskManagementLineItems
1795	Revolving credit facility	Concept (Monetary)	As Of	Credit	ul:RevolvingCreditFacility
1796	Increase in commodity price percentage	Concept (Percent)	For Period		ul:IncreaseInCommodityPricePercentage
1797	Gain (loss) in cash flow hedge reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfCashFlowHedges
1798	Decrease in commodity price percentage	Concept (Percent)	For Period		ul:DecreaseInCommodityPricePercentage
1799	Commodity derivatives	Concept (Monetary)	As Of	Credit	ul:CommodityDerivatives
1800	Impact of change in exchange rate	Concept (Percent)	As Of		ul:IncreaseDecreaseInForeignCurrencyExchangeRate
1801	Financial assets and liabilities other than functional currency amount	Concept (Monetary)	As Of	Debit	ul:FinancialAssetsAndLiabilitiesOtherThanFunctionalCurrencyAmount
1802	Foreign exchange gain	Concept (Monetary)	For Period	Credit	ifrs-full:NetForeignExchangeGain
1803	Foreign exchange loss	Concept (Monetary)	For Period	Debit	ifrs-full:NetForeignExchangeLoss
1804	Percentage of increase of key foreign currencies against domestic currency	Concept (Percent)	For Period		ul:PercentageOfIncreaseOfKeyForeignCurrencyAgainstDomesticCurrency
1805	Impact on equity - trade-related cash flow hedges	Concept (Monetary)	For Period	Debit	ul:ImpactOnEquityTradeRelatedCashFlowHedges
1806	Net investment in foreign operations	Concept (Monetary)	For Period	Credit	ul:FinancialLoansIncludedAsPartOfNetInvestmentInForeignOperations
1807	Exchange differences on translation	Concept (Monetary)	As Of	Credit	ul:FinancialLoansDenominatedInForeignCurrencyValue
1808	Net investment hedges nominal value	Concept (Monetary)	For Period	Credit	ul:NetInvestmentHedgesNominalValue
1809	Impact on equity - net investment hedges	Concept (Monetary)	For Period	Debit	ul:ImpactOnEquityNetInvestmentHedges
1810	Credit exposure	Concept (Monetary)	As Of	Credit	ul:NetExposureOfNetInvestmentInForeignCurrencies
1811	Negative retranslation effect on net investment	Concept (Monetary)	As Of	Credit	ul:NegativeRetranslationEffectOnNetInvestment
1812	Positive retranslation effect on net investment	Concept (Monetary)	As Of	Debit	ul:PositiveRetranslationEffectOnNetInvestment
1813	Percentage of increase in floating interest rate	Concept (Percent)	As Of		ul:PercentageOfIncreaseInFloatingInterestRate
1814	Finance income (cost)	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncomeCost
1815	Percentage of decrease in floating interest rate	Concept (Percent)	For Period		ul:PercentageOfDecreaseInFloatingInterestRate
1816	Interest rate fixed on expected net debt	Concept (Percent)	For Period		ul:PercentageOfDebtFixingConsideringImpactOfInterestRateSwaps
1817	Average interest rate on short term borrowings	Concept (Percent)	For Period		ul:AverageInterestRateOnShorttermBorrowings
1818	Credit in equity from derivatives in cash flow hedge	Concept (Monetary)	For Period	Credit	ul:CreditInEquityFromDerivativesInCashFlowHedge
1819	Derivatives in cash flow hedge relationships	Concept (Monetary)	For Period	Debit	ul:DebitInEquityFromDerivativesInCashFlowHedge
1820	1140 - Disclosure - Treasury Risk Management - Summary of Maturity Analysis for Non-derivative and Derivative Financial Liabilities (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTreasuryRiskManagementSummaryOfMaturityAnalysisForNonderivativeAndDerivativeFinancialLiabilities
1821	Disclosure Of Maturity Analysis For Non-derivative And Derivative Financial Liabilities [Table]	Table	*	*	ul:DisclosureOfMaturityAnalysisForNonderivativeAndDerivativeFinancialLiabilitiesTable
1822	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1823	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1824	Within 1 year [Member]	Member			ifrs-full:NotLaterThanOneYearMember
1825	Due between 1 and 2 years [Member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1826	Due between 2 and 3 years [Member]	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1827	Due between 3 and 4 years [Member]	Member			ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1828	Due between 4 and 5 years [Member]	Member			ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1829	Later than 5 years [Member]	Member			ifrs-full:LaterThanFiveYearsMember
1830	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1831	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1832	Net carrying amount [Member]	Member			ul:NetCarryingAmountMember
1833	Trading Activity By Type 1 [Axis]	Axis			ul:TradingActivityByType1Axis
1834	Trading Activity By Type 1 [Domain]	Member			ul:TradingActivityByType1Domain
1835	Interest rate derivatives [member]	Member			ul:InterestRateDerivativesMember
1836	Foreign exchange derivatives [member]	Member			ul:ForeignExchangeDerivativesMember
1837	Commodity Derivatives [member]	Member			ul:CommodityDerivativesMember
1838	Disclosure Of Maturity Analysis For Non-derivative And Derivative Financial Liabilities [Line Items]	LineItems			ul:DisclosureOfMaturityAnalysisForNonderivativeAndDerivativeFinancialLiabilitiesLineItems
1839	Preference shares	Concept (Monetary)	As Of	Credit	ul:PreferenceSharesUndiscountedCashFlows
1840	Bank loans and overdrafts	Concept (Monetary)	As Of	Credit	ifrs-full:BankBorrowingsUndiscountedCashFlows
1841	Bonds and other loans	Concept (Monetary)	As Of	Credit	ifrs-full:BondsIssuedUndiscountedCashFlows
1842	Finance lease creditors	Concept (Monetary)	As Of	Credit	ifrs-full:GrossLeaseLiabilities
1843	Other financial liabilities	Concept (Monetary)	As Of	Credit	ul:OtherFinancialLiabilitiesUndiscountedCashFlows
1844	Trade payables, accruals and other liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayablesUndiscountedCashFlows
1845	Deferred consideration	Concept (Monetary)	As Of	Credit	ul:UndiscountedValueOfDeferredConsideration
1846	Total non-derivative financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NonderivativeFinancialLiabilitiesUndiscountedCashFlows
1847	Derivative contracts - receipts	Concept (Monetary)	As Of	Credit	ul:DerivativeContractsReceiptsUndiscountedCashFlows
1848	Derivative contracts - payments	Concept (Monetary)	As Of	Debit	ul:DerivativeContractsPaymentsUndiscountedCashFlows
1849	Derivative financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DerivativeFinancialLiabilitiesUndiscountedCashFlows
1850	Derivative & Non-derivative financial liabilities	Concept (Monetary)	As Of	Credit	ul:NonderivativeAndDerivativeFinancialLiabilitiesUndiscountedCashFlows
1851	1141 - Disclosure - Treasury Risk Management - Summary of Derivative Cash Flow Hedges (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTreasuryRiskManagementSummaryOfDerivativeCashFlowHedges
1852	Disclosure Of Derivative Cash Flow Hedges [Table]	Table	*	*	ul:DisclosureOfDerivativeCashFlowHedgesTable
1853	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1854	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1855	Net carrying amount [Member]	Member			ul:NetCarryingAmountMember
1856	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1857	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1858	Within 1 year [Member]	Member			ifrs-full:NotLaterThanOneYearMember
1859	Due between 1 and 2 years [Member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1860	Due between 2 and 3 years [Member]	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1861	Due between 3 and 4 years [Member]	Member			ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1862	Due between 4 and 5 years [Member]	Member			ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1863	Later than 5 years [Member]	Member			ifrs-full:LaterThanFiveYearsMember
1864	Disclosure Of Derivative Cash Flow Hedges [Line Items]	LineItems			ul:DisclosureOfDerivativeCashFlowHedgesLineItems
1865	Foreign exchange cash inflows	Concept (Monetary)	As Of	Debit	ul:ForeignExchangeCashInflows
1866	Foreign exchange cash outflows	Concept (Monetary)	As Of	Credit	ul:ForeignExchangeCashOutflows
1867	Interest rate swaps cash inflows	Concept (Monetary)	As Of	Debit	ul:InterestRateSwapsCashInflows
1868	Interest rate swaps cash outflows	Concept (Monetary)	As Of	Credit	ul:InterestRateSwapsCashOutflows
1869	Commodity contracts cash flows	Concept (Monetary)	As Of	Credit	ul:CommodityContractsCashFlows
1870	1142 - Disclosure - Treasury Risk Management - Impact of Interest Rate Swaps and Cross-Currency Swaps (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTreasuryRiskManagementImpactOfInterestRateSwapsAndCrossCurrencySwaps
1871	Disclosure Of Impact Of Interest Rate Swaps And Cross Currency Swaps [Table]	Table	*	*	ul:DisclosureOfImpactOfInterestRateSwapsAndCrossCurrencySwapsTable
1872	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
1873	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
1874	Fixed and Floating Interest Rate [Member]	Member			ul:FixedAndFloatingInterestRateMember
1875	Disclosure Of Impact Of Interest Rate Swaps And Cross Currency Swaps [Line Items]	LineItems			ul:DisclosureOfImpactOfInterestRateSwapsAndCrossCurrencySwapsLineItems
1876	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1877	Current other financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentFinancialAssets
1878	Current financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentFinancialLiabilities
1879	Non-current financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentFinancialLiabilities
1880	Net debt	Concept (Monetary)	As Of	Credit	ifrs-full:NetDebt
1881	Fixed rate (weighted average amount of fixing for the following year)	Concept (Monetary)	As Of	Credit	ul:FixedRateAssetAndLiabilityNet
1882	1143 - Disclosure - Treasury Risk Management - Summary of Derivatives Used to Hedge (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTreasuryRiskManagementSummaryOfDerivativesUsedToHedge
1883	Disclosure of detailed information about hedges [table]	Table	*	*	ifrs-full:DisclosureOfHedgeAccountingTable
1884	Types of hedges [axis]	Axis			ifrs-full:TypesOfHedgesAxis
1885	Hedges [member]	Member			ifrs-full:TypesOfHedgesMember
1886	Fair value hedges [member]	Member			ifrs-full:FairValueHedgesMember
1887	Cash flow hedges [member]	Member			ifrs-full:CashFlowHedgesMember
1888	Hedges of net investment in foreign operations [member]	Member			ifrs-full:HedgesOfNetInvestmentInForeignOperationsMember
1889	Hedge accounting not applied [member]	Member			ul:HedgeAccountingNotAppliedMember
1890	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1891	Other [Member]	Member			ifrs-full:FinancialAssetsMember
1892	Foreign exchange derivatives [member]	Member			ul:ForeignExchangeDerivativesMember
1893	Cross currency interest rate swaps contract [member]	Member			ul:CrossCurrencyInterestRateSwapsContractMember
1894	Commodity contracts [Member]	Member			ul:CommodityContractsMember
1895	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1896	Net Defined Benefit Liability (Asset) [Member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
1897	Derivatives designated as hedges [member]	Member			ul:DerivativesDesignatedAsHedgesMember
1898	Derivative used to hedge [Member]	Member			ul:DerivativeUsedToHedgeMember
1899	Disclosure of detailed information about hedges [line items]	LineItems			ifrs-full:DisclosureOfHedgeAccountingLineItems
1900	Trade and other receivable	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherReceivables
1901	Total Financial assets	Concept (Monetary)	As Of	Debit	ul:GrossFinancialAssetsInDerivatives
1902	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
1903	Total financial liabilities	Concept (Monetary)	As Of	Credit	ul:GrossLiabilitiesInDerivatives
1904	Trade payables and other liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayables
1905	Current financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentFinancialLiabilities
1906	Non-current financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentFinancialLiabilities
1907	Total	Concept (Monetary)	As Of	Debit	ul:DerivativeFinancialAssetsLiabilitiesNet
1908	1144 - Disclosure - Treasury Risk Management - Summary of Financial Assets are Subject to Offsetting, Enforceable Master Netting Arrangements and Similar Agreements (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTreasuryRiskManagementSummaryOfFinancialAssetsAreSubjectToOffsettingEnforceableMasterNettingArrangementsAndSimilarAgreements
1909	Disclosure of offsetting of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfOffsettingOfFinancialAssetsTable
1910	Types of financial assets [axis]	Axis			ifrs-full:TypesOfFinancialAssetsAxis
1911	Financial assets, type [member]	Member			ifrs-full:FinancialAssetsTypeMember
1912	Derivative Financial Assets [Member]	Member			ul:DerivativeFinancialAssetsMember
1913	Disclosure of offsetting of financial assets [line items]	LineItems			ifrs-full:DisclosureOfOffsettingOfFinancialAssetsLineItems
1914	Gross amounts of recognised financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:GrossFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements
1915	Gross amounts of recognised financial assets set off in the balance sheet	Concept (Monetary)	As Of	Credit	ifrs-full:GrossFinancialLiabilitiesSetOffAgainstFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements
1916	Net amounts of financial assets presented in the balance sheet	Concept (Monetary)	As Of	Debit	ifrs-full:NetFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreementsInStatementOfFinancialPosition
1917	Financial instruments	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialInstrumentsSubjectToEnforceableMasterNettingArrangementOrSimilarAgreementNotSetOffAgainstFinancialAssets
1918	Cash collateral received	Concept (Monetary)	As Of	Credit	ifrs-full:CashCollateralReceivedSubjectToEnforceableMasterNettingArrangementOrSimilarAgreementNotSetOffAgainstFinancialAssets
1919	Net amount	Concept (Monetary)	As Of	Debit	ifrs-full:NetFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements
1920	1145 - Disclosure - Treasury Risk Management - Summary of Financial Liabilities are Subject to Offsetting, Enforceable Master Netting Arrangements and Similar Agreements (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureTreasuryRiskManagementSummaryOfFinancialLiabilitiesAreSubjectToOffsettingEnforceableMasterNettingArrangementsAndSimilarAgreements
1921	Disclosure of offsetting of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfOffsettingOfFinancialLiabilitiesTable
1922	Types of financial liabilities [axis]	Axis			ifrs-full:TypesOfFinancialLiabilitiesAxis
1923	Financial liabilities, type [member]	Member			ifrs-full:FinancialLiabilitiesTypeMember
1924	Derivative financial liabilities [Member]	Member			ul:DerivativeFinancialLiabilitiesMember
1925	Disclosure of offsetting of financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfOffsettingOfFinancialLiabilitiesLineItems
1926	Gross amounts of recognised financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:GrossFinancialLiabilitiesSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements
1927	Gross amounts of recognised financial liabilities set off in the balance sheet	Concept (Monetary)	As Of	Debit	ifrs-full:GrossFinancialAssetsSetOffAgainstFinancialLiabilitiesSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements
1928	Net amounts of financial liabilities presented in the balance sheet	Concept (Monetary)	As Of	Credit	ifrs-full:NetFinancialLiabilitiesSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreementsInStatementOfFinancialPosition
1929	Financial instruments	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialInstrumentsSubjectToEnforceableMasterNettingArrangementOrSimilarAgreementNotSetOffAgainstFinancialLiabilities
1930	Cash collateral pledged	Concept (Monetary)	As Of	Debit	ifrs-full:CashCollateralPledgedSubjectToEnforceableMasterNettingArrangementOrSimilarAgreementNotSetOffAgainstFinancialLiabilities
1931	Net amount	Concept (Monetary)	As Of	Credit	ifrs-full:NetFinancialLiabilitiesSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements
1932	1146 - Disclosure - Investment and Return - Schedule of Cash Resources and Other Financial Assets (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureInvestmentAndReturnScheduleOfCashResourcesAndOtherFinancialAssets
1933	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
1934	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1935	Other [Member]	Member			ifrs-full:FinancialAssetsMember
1936	Derivatives [member]	Member			ifrs-full:DerivativesMember
1937	Other [member]	Member			ul:OtherFinancialAssetMember
1938	Disclosure of financial assets [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
1939	Cash and cash equivalents	Abstract			ifrs-full:CashAndCashEquivalentsAbstract
1940	Cash at bank and in hand	Concept (Monetary)	As Of	Debit	ifrs-full:Cash
1941	Short-term deposits with maturity of less than three months	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
1942	Other cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCashAndCashEquivalents
1943	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1944	Cash at bank and in hand	Concept (Monetary)	As Of	Debit	ifrs-full:Cash
1945	Short-term deposits with maturity of less than three months	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
1946	Other cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCashAndCashEquivalents
1947	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1948	Other current financial assets	Abstract			ul:OtherCurrentFinancialAssetsAbstract
1949	Amortised cost	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentFinancialAssetsAtAmortisedCost
1950	Financial assets at fair value through other comprehensive income	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentFinancialAssetsAtFairValueThroughOtherComprehensiveIncome
1951	Current financial assets at fair value through profit or loss:	Abstract			ifrs-full:CurrentFinancialAssetsAtFairValueThroughProfitOrLossAbstract
1952	Current financial assets at fair value through profit or loss	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentFinancialAssetsAtFairValueThroughProfitOrLoss
1953	Current held-to-maturity investments	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentHeldtomaturityInvestments
1954	Current loans and receivables	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentLoansAndReceivables
1955	Current available-for-sale financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentFinancialAssetsAvailableforsale
1956	Other current financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentFinancialAssets
1957	Current financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentFinancialAssets
1958	Other non-current financial assets	Abstract			ul:OtherNoncurrentFinancialAssetsAbstract
1959	Amortised cost	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentFinancialAssetsAtAmortisedCost
1960	Financial assets at fair value through other comprehensive income	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentFinancialAssetsAtFairValueThroughOtherComprehensiveIncome
1961	Non-current financial assets at fair value through profit or loss:	Abstract			ifrs-full:NoncurrentFinancialAssetsAtFairValueThroughProfitOrLossAbstract
1962	Non-current financial assets at fair value through profit or loss	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentFinancialAssetsAtFairValueThroughProfitOrLoss
1963	Non-current held-to-maturity investments	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentHeldtomaturityInvestments
1964	Non-current loans and receivables	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentLoansAndReceivables
1965	Non-current available-for-sale financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentFinancialAssetsAvailableforsale
1966	Other non-current financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentFinancialAssets
1967	Non-current financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentFinancialAssets
1968	Cash and cash equivalents	Abstract			ifrs-full:CashAndCashEquivalentsAbstract
1969	Cash at bank and in hand	Concept (Monetary)	As Of	Debit	ifrs-full:Cash
1970	Short-term deposits with maturity of less than three months	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
1971	Other cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCashAndCashEquivalents
1972	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1973	Cash at bank and in hand	Concept (Monetary)	As Of	Debit	ifrs-full:Cash
1974	Short-term deposits with maturity of less than three months	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
1975	Other cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCashAndCashEquivalents
1976	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1977	Other financial assets	Abstract			ul:OtherFinancialAssetsAbstract
1978	Amortised cost	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtAmortisedCost
1979	Financial assets at fair value through other comprehensive income	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncome
1980	Financial assets at fair value through profit or loss:	Abstract			ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossAbstract
1981	Financial assets at fair value through profit or loss	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLoss
1982	Held-to-maturity investments	Concept (Monetary)	As Of	Debit	ifrs-full:HeldtomaturityInvestments
1983	Loans and receivables	Concept (Monetary)	As Of	Debit	ifrs-full:LoansAndReceivables
1984	Available-for-sale financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAvailableforsale
1985	Other financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherFinancialAssets
1986	Total	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
1987	1147 - Disclosure - Investment and Return - Schedule of Cash Resources and Other Financial Assets (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureInvestmentAndReturnScheduleOfCashResourcesAndOtherFinancialAssetsParenthetical
1988	Implied Table	Table	*	*	implied:Table
1989	Disclosure of financial assets [abstract]	Abstract			ifrs-full:DisclosureOfFinancialAssetsAbstract
1990	Equity Investments included in financial assets at fair value through other comprehensive income	Concept (Monetary)	As Of	Debit	ifrs-full:FairValueOfInvestmentsInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncome
1991	Movement of Equity Investments	Concept (Monetary)	As Of	Debit	ul:MovementOfEquityInstrumentsDesignatedAtFairValueThroughOtherComprehensiveIncome
1992	Assets in trust fund benefit obligations	Concept (Monetary)	For Period	Debit	ul:AssetsInTrustFundBenefitObligations
1993	1148 - Disclosure - Investment and Return - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureInvestmentAndReturnAdditionalInformation
1994	Disclosure Of Cash And Cash Equivalents [Table]	Table	*	*	ul:DisclosureOfCashAndCashEquivalentsTable
1995	Types of hedges [axis]	Axis			ifrs-full:TypesOfHedgesAxis
1996	Hedges [member]	Member			ifrs-full:TypesOfHedgesMember
1997	Cash [Member]	Member			ul:Cash1Member
1998	Bond Securities [Member]	Member			ul:BondSecuritiesMember
1999	Effect of overlay approach reclassification [axis]	Axis			ifrs-full:EffectOfOverlayApproachReclassificationAxis
2000	In accordance with IFRS 9 [member]	Member			ifrs-full:InAccordanceWithIFRS9Member
2001	IFRS9 [member]	Member			ul:IFRS9Member
2002	Disclosure of cash and cash equivalents [line items]	LineItems			ul:DisclosureOfCashAndCashEquivalentsLineItems
2003	Equity instruments recogonised at fair value through profit or loss	Concept (Monetary)	As Of	Debit	ul:FinancialAssetsPreviouslyDesignatedAtFairValueThroughEquityToFairValueThroughProfitAndLosssDueToInitialApplicationOfIfrs9
2004	Financial assets measured at fair value through profit or loss reclassified to amortised cost	Concept (Monetary)	As Of	Debit	ifrs-full:FairValueOfFinancialAssetsReclassifiedAsMeasuredAtAmortisedCostFirstApplicationOfIFRS9
2005	Cash and cash equivalents held by central finance companies	Concept (Monetary)	As Of	Debit	ul:CashAndCashEquivalentsHeldByCentralFinanceCompanies
2006	Percentage of cash and cash equivalents held by central finance companies	Concept (Percent)	For Period		ul:CashAndCashEquivalentsHeldByCentralFinanceCompaniesPercentage
2007	Cash and cash equivalents held with foreign subsidiaries	Concept (Monetary)	As Of	Debit	ul:CashAndCashEquivalentsHeldByForeignSubsidiaries
2008	Percentage of cash and cash equivalents held with foreign subsidiaries	Concept (Percent)	For Period		ul:CashAndCashEquivalentsHeldByForeignSubsidiariesPercentage
2009	Cash and cash equivalents held with foreign subsidiaries for general use by wider business	Concept (Monetary)	As Of	Debit	ul:CashAndCashEquivalentsInCountriesWithCrossBorderControlOnCashTransfers
2010	Description of collateral held as security	Concept (Text/String)	For Period		ifrs-full:DescriptionOfCollateralHeldAsSecurityAndOtherCreditEnhancements2014
2011	Collateral held permitted to be sold or repledged in absence of default by owner of collateral, at fair value	Concept (Monetary)	As Of	Debit	ifrs-full:AssetsHeldAsCollateralPermittedToBeSoldOrRepledgedAtFairValue
2012	1149 - Disclosure - Investment and Return - Schedule of Cash and Cash Equivalents Reconciliation to Cash Flow Statement (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureInvestmentAndReturnScheduleOfCashAndCashEquivalentsReconciliationToCashFlowStatement
2013	Implied Table	Table	*	*	implied:Table
2014	Cash and cash equivalents if different from statement of financial position [abstract]	Abstract			ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPositionAbstract
2015	Cash and cash equivalents per balance sheet	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
2016	Less: bank overdrafts	Concept (Monetary)	As Of	Credit	ifrs-full:BankOverdraftsClassifiedAsCashEquivalents
2017	Add: cash and cash equivalents included in assets held for sale	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale
2018	Cash and cash equivalents per cash flow statement	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
2019	1150 - Disclosure - Financial Instruments - Summary of Fair Values of Financial Assets and Financial Liabilities (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfFairValuesOfFinancialAssetsAndFinancialLiabilities
2020	Disclosure of Detailed Information about Financial Instruments [Table]	Table	*	*	ifrs-full:DisclosureOfFinancialInstrumentsTable
2021	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
2022	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
2023	Fair value [member]	Member			ifrs-full:AtFairValueMember
2024	Carrying amount [member]	Member			ul:CarryingValueMember
2025	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
2026	Other [Member]	Member			ifrs-full:FinancialAssetsMember
2027	Derivatives [member]	Member			ifrs-full:DerivativesMember
2028	Other [member]	Member			ul:OtherFinancialAssetMember
2029	Disclosure of Detailed Information about Financial Instruments [Line Items]	LineItems			ifrs-full:DisclosureOfFinancialInstrumentsLineItems
2030	Financial assets	Abstract			ifrs-full:CategoriesOfFinancialAssetsAbstract
2031	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
2032	Held-to-maturity investments	Concept (Monetary)	As Of	Debit	ifrs-full:HeldtomaturityInvestments
2033	Loans and receivables	Concept (Monetary)	As Of	Debit	ifrs-full:LoansAndReceivables
2034	Available-for-sale financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAvailableforsale
2035	Amortised cost	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtAmortisedCost
2036	Financial assets at fair value through other comprehensive income	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncome
2037	Financial assets at fair value through profit or loss:	Abstract			ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossAbstract
2038	Financial assets at fair value through profit or loss	Concept (Monetary)	As Of	Debit	ifrs-full:DerivativeFinancialAssets
2039	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLoss
2040	Financial liabilities	Abstract			ifrs-full:CategoriesOfFinancialLiabilitiesAbstract
2041	Bank loans and overdrafts	Concept (Monetary)	As Of	Credit	ul:BankLoansAndOverdrafts
2042	Bonds and other loans	Concept (Monetary)	As Of	Credit	ul:BondsAndOtherLoans
2043	Finance lease creditors	Concept (Monetary)	As Of	Credit	ifrs-full:LeaseLiabilities
2044	Derivatives	Concept (Monetary)	As Of	Credit	ifrs-full:DerivativeFinancialLiabilities
2045	Other financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherFinancialLiabilities
2046	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
2047	1151 - Disclosure - Financial Instruments Fair Value Risk - Summary of Assets and Liabilities Carried at Fair Value, Classification of Fair Value Calculations by Category (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsFairValueRiskSummaryOfAssetsAndLiabilitiesCarriedAtFairValueClassificationOfFairValueCalculationsByCategory
2048	Disclosure of Detailed Information about Financial Instruments [Table]	Table	*	*	ifrs-full:DisclosureOfFinancialInstrumentsTable
2049	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
2050	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
2051	Fair value [member]	Member			ifrs-full:AtFairValueMember
2052	Levels of fair value hierarchy [axis]	Axis			ifrs-full:LevelsOfFairValueHierarchyAxis
2053	All levels of fair value hierarchy [member]	Member			ifrs-full:AllLevelsOfFairValueHierarchyMember
2054	Level 1 [member]	Member			ifrs-full:Level1OfFairValueHierarchyMember
2055	Level 2 [member]	Member			ifrs-full:Level2OfFairValueHierarchyMember
2056	Level 3 [member]	Member			ifrs-full:Level3OfFairValueHierarchyMember
2057	Disclosure of Detailed Information about Financial Instruments [Line Items]	LineItems			ifrs-full:DisclosureOfFinancialInstrumentsLineItems
2058	Financial assets at fair value through other comprehensive income	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncome
2059	Available-for-sale financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAvailableforsale
2060	Financial assets at fair value through profit or loss:	Abstract			ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossAbstract
2061	Derivatives	Concept (Monetary)	As Of	Debit	ul:DerivativesFinancialAssetsInclusiveOfHedgeTradingActivities
2062	Other	Concept (Monetary)	As Of	Debit	ifrs-full:OtherFinancialAssets
2063	Derivatives	Concept (Monetary)	As Of	Credit	ul:DerivativesFinancialLiabilitiesInclusiveOfHedgeTradingActivities
2064	Contingent consideration	Concept (Monetary)	As Of	Credit	ul:DeferredContingentConsideration
2065	1152 - Disclosure - Financial Instruments Fair Value Risk - Summary of Assets and Liabilities Carried at Fair Value, Classification of Fair Value Calculations by Category (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsFairValueRiskSummaryOfAssetsAndLiabilitiesCarriedAtFairValueClassificationOfFairValueCalculationsByCategoryParenthetical
2066	Disclosure of Detailed Information about Financial Instruments [Table]	Table	*	*	ifrs-full:DisclosureOfFinancialInstrumentsTable
2067	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
2068	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
2069	Fair value [member]	Member			ifrs-full:AtFairValueMember
2070	Disclosure of Detailed Information about Financial Instruments [Line Items]	LineItems			ifrs-full:DisclosureOfFinancialInstrumentsLineItems
2071	Derivatives assets, reported within trade receivables	Concept (Monetary)	As Of	Debit	ul:DerivativesFinancialAssetsReportedWithinTradeReceivablesHedgeTradingActivities
2072	Derivatives liabilities, reported within trade receivables	Concept (Monetary)	As Of	Credit	ul:DerivativesFinancialLiabilitiesReportedWithinTradeReceivablesHedgeTradingActivities
2073	1153 - Disclosure - Financial Instruments Fair Value Risk - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsFairValueRiskAdditionalInformation
2074	Disclosure of Detailed Information about Financial Instruments [Table]	Table	*	*	ifrs-full:DisclosureOfFinancialInstrumentsTable
2075	Levels of fair value hierarchy [axis]	Axis			ifrs-full:LevelsOfFairValueHierarchyAxis
2076	All levels of fair value hierarchy [member]	Member			ifrs-full:AllLevelsOfFairValueHierarchyMember
2077	Level 3 [member]	Member			ifrs-full:Level3OfFairValueHierarchyMember
2078	Types of insurance contracts [axis]	Axis			ifrs-full:TypesOfInsuranceContractsAxis
2079	Types of insurance contracts [member]	Member			ifrs-full:InsuranceContractsMember
2080	Split-Dollar Life Insurance [Member]	Member			ul:SplitDollarLifeInsuranceMember
2081	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
2082	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
2083	Fair value [member]	Member			ifrs-full:AtFairValueMember
2084	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
2085	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
2086	Unilever Ventures companies [Member]	Member			ul:UnileverVenturesCompaniesMember
2087	Disclosure of Detailed Information about Financial Instruments [Line Items]	LineItems			ifrs-full:DisclosureOfFinancialInstrumentsLineItems
2088	Impact in income statement due to Level 3 instruments	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss
2089	Assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
2090	Unlisted investments include of investment	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVentures
2091	1154 - Disclosure - Financial Instruments Fair Value Risk - Summary of Reconciliation of Movements in Level 3 Valuations (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsFairValueRiskSummaryOfReconciliationOfMovementsInLevel3Valuations
2092	Disclosure of Fair Value Measurement of Assets [Table]	Table	*	*	ifrs-full:DisclosureOfFairValueMeasurementOfAssetsTable
2093	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
2094	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
2095	Fair value [member]	Member			ifrs-full:AtFairValueMember
2096	Levels of fair value hierarchy [axis]	Axis			ifrs-full:LevelsOfFairValueHierarchyAxis
2097	All levels of fair value hierarchy [member]	Member			ifrs-full:AllLevelsOfFairValueHierarchyMember
2098	Level 3 fair value measurements of financial assets and financial liabilities [member]	Member			ul:LevelFairValueMeasurementsOfFinancialAssetsAndFinancialLiabilitiesMember
2099	Disclosure of Fair Value Measurement of Assets [Line Items]	LineItems			ifrs-full:DisclosureOfFairValueMeasurementOfAssetsLineItems
2100	Assets and liabilities beginning balance	Concept (Monetary)	As Of	Debit	ul:FinancialAssetsAndFinancialLiabilitiesAtFairValue
2101	Gains and losses recognised in profit and loss	Concept (Monetary)	For Period	Credit	ul:GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssetsAndLiabilities
2102	Gains and losses recognised in other comprehensive income	Concept (Monetary)	For Period		ul:GainsLossesRecognisedInOtherComprehensiveIncomeFairValueMeasurementAssetsLiabilities
2103	Purchases and new issues	Concept (Monetary)	For Period	Debit	ul:PurchasesAndNewIssuesFairValueMeasurementAssetsAndLiabilities
2104	Sales and settlements	Concept (Monetary)	For Period	Credit	ul:SalesAndSettlementsFairValueMeasurementAssetsAndLiabilities
2105	Transfers into Level 3	Concept (Monetary)	For Period	Debit	ul:TransfersIntoLevel3OfFairValueHierarchyAssetsLiabilities
2106	Assets and liabilities ending balance	Concept (Monetary)	As Of	Debit	ul:FinancialAssetsAndFinancialLiabilitiesAtFairValue
2107	1155 - Disclosure - Provisions - Summary of Other Provisions (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureProvisionsSummaryOfOtherProvisions
2108	Implied Table	Table	*	*	implied:Table
2109	Disclosure of other provisions [abstract]	Abstract			ifrs-full:DisclosureOfOtherProvisionsAbstract
2110	Due within one year	Concept (Monetary)	As Of	Credit	ifrs-full:OtherShorttermProvisions
2111	Due after one year	Concept (Monetary)	As Of	Credit	ifrs-full:OtherLongtermProvisions
2112	Total Provisions	Concept (Monetary)	As Of	Credit	ifrs-full:OtherProvisions
2113	1156 - Disclosure - Provisions - Summary of Movement of Other Provisions (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureProvisionsSummaryOfMovementOfOtherProvisions
2114	Disclosure of Provisions [Table]	Table	*	*	ul:DisclosureOfProvisionsTable
2115	Classes of other provisions [axis]	Axis			ifrs-full:ClassesOfProvisionsAxis
2116	Other provisions [member]	Member			ifrs-full:OtherProvisionsMember
2117	Restructuring [Member]	Member			ifrs-full:RestructuringProvisionMember
2118	Legal [Member]	Member			ifrs-full:LegalProceedingsProvisionMember
2119	Brazil Indirect Taxes [member]	Member			ul:BrazilIndirectTaxesMember
2120	Other [Member]	Member			ifrs-full:MiscellaneousOtherProvisionsMember
2121	Disclosure of Provisions [Line Items]	LineItems			ul:DisclosureOfProvisionsLineItems
2122	Other provisions beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:OtherProvisions
2123	Charges	Concept (Monetary)	For Period	Credit	ifrs-full:AdditionalProvisionsOtherProvisions
2124	Releases	Concept (Monetary)	For Period	Debit	ifrs-full:UnusedProvisionReversedOtherProvisions
2125	Reclassification	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions
2126	Utilisation	Concept (Monetary)	For Period	Debit	ifrs-full:ProvisionUsedOtherProvisions
2127	Currency translation	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions
2128	Other provisions ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:OtherProvisions
2129	1157 - Disclosure - Provisions - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureProvisionsAdditionalInformation
2130	Disclosure of Provisions [Table]	Table	*	*	ul:DisclosureOfProvisionsTable
2131	Classes of other provisions [axis]	Axis			ifrs-full:ClassesOfProvisionsAxis
2132	Other provisions [member]	Member			ifrs-full:OtherProvisionsMember
2133	Payments in relation to legal cases [member]	Member			ul:PaymentsInRelationToLegalCasesMember
2134	Disclosure of Provisions [Line Items]	LineItems			ul:DisclosureOfProvisionsLineItems
2135	Legal claims paid for investigations by national competition authorities	Concept (Monetary)	For Period	Debit	ul:LegalSettlementClaimPaid
2136	Legal claims paid for investigations by national competition authorities from prior year provision	Concept (Monetary)	For Period	Debit	ul:LegalClaimsPaidInCurrentYearOutOfPreviousYearProvision
2137	1158 - Disclosure - Commitments and Contingent Liabilities - Summary of Long-term Finance Lease Commitments (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesSummaryOfLongtermFinanceLeaseCommitments
2138	Disclosure of Finance Lease by Lessee [table]	Table	*	*	ul:DisclosureOfFinanceLeaseByLesseeTable
2139	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
2140	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
2141	Buildings [member]	Member			ifrs-full:BuildingsMember
2142	Plant and machinery [Member]	Member			ul:PlantAndMachineryMember
2143	Maturity [axis]	Axis			ifrs-full:MaturityAxis
2144	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
2145	Within 1 year [Member]	Member			ifrs-full:NotLaterThanOneYearMember
2146	Later than 1 year but not later than 5 years [Member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
2147	Later than 5 years [Member]	Member			ifrs-full:LaterThanFiveYearsMember
2148	Disclosure of Finance Lease by Lessee [Line Items]	LineItems			ul:DisclosureOfFinanceLeaseByLesseeLineItems
2149	Future minimum lease payments	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumFinanceLeasePaymentsPayable
2150	Finance Cost	Concept (Monetary)	As Of	Credit	ifrs-full:FutureFinanceChargeOnFinanceLease
2151	Present value	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue
2152	1159 - Disclosure - Commitments and Contingent Liabilities - Summary of Detailed Information about Property Plant and Equipment (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesSummaryOfDetailedInformationAboutPropertyPlantAndEquipment
2153	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
2154	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
2155	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
2156	Finance Leases [Member]	Member			ul:FinanceLeasesMember
2157	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
2158	Property, plant and equipment [member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
2159	Buildings [member]	Member			ifrs-full:BuildingsMember
2160	Plant and equipment [Member]	Member			ul:PlantAndEquipmentMember
2161	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
2162	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
2163	Cost [Member]	Member			ifrs-full:GrossCarryingAmountMember
2164	Accumulated depreciation [Member]	Member			ifrs-full:AccumulatedDepreciationAndAmortisationMember
2165	Disclosure of Detailed Information about Property, Plant and Equipment [Line Items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
2166	Property plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
2167	1160 - Disclosure - Commitments and Contingent Liabilities - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformation
2168	Implied Table	Table	*	*	implied:Table
2169	Disclosure of finance lease and operating lease by lessee [abstract]	Abstract			ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeAbstract
2170	Future minimum sublease payments under finance lease expected to be received	Concept (Monetary)	As Of	Debit	ul:ExpectedFutureMinimumSubleasePaymentsReceivableClassifiedAsFinanceLease
2171	Future minimum sublease payments under operating lease expected to be received	Concept (Monetary)	As Of	Debit	ul:ExpectedFutureMinimumSubleasePaymentsReceivableClassifiedAsOperatingLease
2172	1161 - Disclosure - Commitments and Contingent Liabilities - Summary of Long-term Operating Lease Commitments (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesSummaryOfLongtermOperatingLeaseCommitments
2173	Long term operating lease commitments [Table]	Table	*	*	ul:LongTermOperatingLeaseCommitmentsTable
2174	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
2175	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
2176	Land and buildings [Member]	Member			ifrs-full:LandAndBuildingsMember
2177	Plant and machinery [Member]	Member			ul:PlantAndMachineryMember
2178	Long term operating lease commitments [Line Items]	LineItems			ul:LongTermOperatingLeaseCommitmentsLineItems
2179	Long-term operating lease commitments	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
2180	1162 - Disclosure - Commitments and Contingent Liabilities - Summary of Operating Lease and Other Commitments (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesSummaryOfOperatingLeaseAndOtherCommitments
2181	Disclosure Of Operating Lease And Other Commitments [Table]	Table	*	*	ul:DisclosureOfOperatingLeaseAndOtherCommitmentsTable
2182	Maturity [axis]	Axis			ifrs-full:MaturityAxis
2183	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
2184	Within 1 year [Member]	Member			ifrs-full:NotLaterThanOneYearMember
2185	Later than 1 year but not later than 5 years [Member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
2186	Later than 5 years [Member]	Member			ifrs-full:LaterThanFiveYearsMember
2187	Disclosure Of Operating Lease And Other Commitments [Line Items]	LineItems			ul:DisclosureOfOperatingLeaseAndOtherCommitmentsLineItems
2188	Operating leases	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
2189	Other commitments	Concept (Monetary)	As Of	Credit	ul:OtherCommitments
2190	1163 - Disclosure - Commitments and Contingent Liabilities - Summary of Contingent Liabilities (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesSummaryOfContingentLiabilities
2191	Disclosure of contingent liabilities [table]	Table	*	*	ifrs-full:DisclosureOfContingentLiabilitiesTable
2192	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
2193	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
2194	Brazil [member]	Member			country:BR
2195	Other Countries [Member]	Member			ul:OtherCountriesMember
2196	Disclosure of contingent liabilities [line items]	LineItems			ifrs-full:DisclosureOfContingentLiabilitiesLineItems
2197	Corporate reorganisation - IPI, PIS and COFINS taxes and penalties	Concept (Monetary)	As Of	Credit	ul:IndirectTaxRelatingToCorporateReorganisation
2198	Inputs for PIS and COFINS taxes	Concept (Monetary)	As Of	Credit	ul:InputsForPISCOFINS
2199	Goodwill amortisation	Concept (Monetary)	As Of	Credit	ul:GoodwillAmortisationContingentLiabilities
2200	Other tax assessments - approximately 600 cases	Concept (Monetary)	As Of	Credit	ul:OtherTaxAssessmentsContingentLiabilities
2201	Total contingent liabilities	Concept (Monetary)	As Of	Credit	ul:ContingentLiabilities
2202	Brazil other	Concept (Monetary)	As Of	Debit	ul:OtherContingentLiabilities
2203	1164 - Disclosure - Commitments and Contingent Liabilities - Summary of Contingent Liabilities (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesSummaryOfContingentLiabilitiesParenthetical
2204	Disclosure of contingent liabilities [table]	Table	*	*	ifrs-full:DisclosureOfContingentLiabilitiesTable
2205	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
2206	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
2207	Brazil [member]	Member			country:BR
2208	Disclosure of contingent liabilities [line items]	LineItems			ifrs-full:DisclosureOfContingentLiabilitiesLineItems
2209	Corporate reorganisation tax assessment	Concept (Monetary)	As Of	Credit	ul:IndirectTaxRelatingToCorporateReorganisation
2210	1165 - Disclosure - Acquisitions and Disposals - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureAcquisitionsAndDisposalsAdditionalInformation
2211	Disclosure of Acquisitions and Disposals [Table]	Table	*	*	ul:DisclosureOfAcquisitionsAndDisposalsTable
2212	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
2213	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
2214	Blueair [member]	Member			ul:BlueairMember
2215	Assets and liabilities classified as held for sale [axis]	Axis			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis
2216	Assets and liabilities not classified as held for sale [member]	Member			ifrs-full:AssetsAndLiabilitiesNotClassifiedAsHeldForSaleMember
2217	Global spreads business (excluding South Africa) [member]	Member			ul:GlobalSpreadsBusinessExcludingSouthAfricaMember
2218	'South Africa spreads business [member]	Member			ul:SouthAfricaSpreadsBusinessMember
2219	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
2220	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
2221	Hindustan Unilever Limited [Member]	Member			ul:HindustanUnileverLimitedMember
2222	Glaxo Smith Kline [member]	Member			ul:GlaxoSmithKlineMember
2223	Products and services [axis]	Axis			ifrs-full:ProductsAndServicesAxis
2224	Products and services [member]	Member			ifrs-full:ProductsAndServicesMember
2225	Health food drinks portfolio [member]	Member			ul:HealthFoodDrinksPortfolioMember
2226	Cash-generating units [axis]	Axis			ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
2227	Entity's total for cash-generating units [member]	Member			ifrs-full:EntitysTotalForCashgeneratingUnitsMember
2228	Cash-generating units [member]	Member			ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesMember
2229	Disclosure of Acquisitions and Disposals [Line Items]	LineItems			ul:DisclosureOfAcquisitionsAndDisposalsLineItems
2230	Total payment for acquisition	Concept (Monetary)	For Period	Credit	ul:PaymentForAcquisitionOfBusiness
2231	Consideration payable via combination of cash and shares	Concept (Monetary)	As Of	Credit	ul:BusinessCombinationFutureConsiderationPayment
2232	Turnover	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
2233	Revenue of acquiree	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueOfAcquiree
2234	Operating profit of acquiree	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossOfAcquiree
2235	Revenue of group if acquisition completed	Concept (Monetary)	For Period	Credit	ul:RevenueOfGroupIfAcquisitionCompletedAtBeginningOfTheYear
2236	Operating profit of group if acquisition completed	Concept (Monetary)	For Period	Credit	ul:OperatingProfitOfGroupIfAcquisitionCompletedAtBeginningOfTheYear
2237	Goodwill expected to be tax deductible	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillExpectedDeductibleForTaxPurposes
2238	Contingent liabilities acquired	Concept (Monetary)	As Of	Credit	ifrs-full:ContingentLiabilitiesRecognisedInBusinessCombination
2239	Acquisition and disposal related income	Concept (Monetary)	For Period	Credit	ul:CreditFromEarlySettlementOfContingentConsiderationBlueair
2240	Impairment of intangible asset	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill
2241	Description of goodwill	Concept (Text/String)	For Period		ifrs-full:DescriptionOfFactorsThatMakeUpGoodwillRecognised
2242	Consideration Received	Concept (Monetary)	For Period	Credit	ifrs-full:ConsiderationPaidReceived
2243	Non cash consideration	Concept (Monetary)	For Period	Debit	ul:NonCashConsideration
2244	Profit on disposals	Concept (Monetary)	For Period	Credit	ul:GainLossOnDisposalOfGroupCompanies
2245	Goodwill allocated	Concept (Monetary)	For Period	Credit	ul:DisposalsOfGoodwill
2246	Number of countries in which manufacturing assets were disposed	Concept (Integer)	For Period		ul:NumberOfCountriesInWhichManufacturingAssetsWereDisposed
2247	1166 - Disclosure - Acquisitions and Disposals - Summary of Business Acquisitions and Disposals (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureAcquisitionsAndDisposalsSummaryOfBusinessAcquisitionsAndDisposals
2248	Disclosure of Acquisitions and Disposals [Table]	Table	*	*	ul:DisclosureOfAcquisitionsAndDisposalsTable
2249	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
2250	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
2251	Living proof [Member]	Member			ul:LivingProofMember
2252	AdeS Soy Beverage Business [member]	Member			ul:AdeSSoyBeverageBusinessMember
2253	Kensingtons [member]	Member			ul:KensingtonsMember
2254	Eac Myanmar [member]	Member			ul:EacMyanmarMember
2255	Hourglass [member]	Member			ul:HourglassMember
2256	Pukka herbs [member]	Member			ul:PukkaHerbsMember
2257	Weis [member]	Member			ul:WeisMember
2258	Carver Korea [member]	Member			ul:CarverKoreaMember
2259	Mae terra [member]	Member			ul:MaeTerraMember
2260	TAZO [member]	Member			ul:TazoMember
2261	Sundial brands [member]	Member			ul:SundialBrandsMember
2262	Schmidt naturals [member]	Member			ul:SchmidtNaturalsMember
2263	Quala beauty and personal and home care [member]	Member			ul:QualaBeautyAndPersonalAndHomeCareMember
2264	Global spreads business (excluding South Africa) [member]	Member			ul:GlobalSpreadsBusinessExcludingSouthAfricaMember
2265	Adityaa Milk Ice Cream [member]	Member			ul:AdityaaMilkIceCreamMember
2266	Betty Ice Cream [member]	Member			ul:BettyIceCreamMember
2267	Denny Ice Cream [member]	Member			ul:DennyIceCreamMember
2268	Spreads business in South Africa [member]	Member			ul:SpreadsBusinessInSouthAfricaMember
2269	South Africa holdings [member]	Member			ul:SouthAfricaHoldingsMember
2270	Equilibra [member]	Member			ul:EquilibraMember
2271	Vegetarian Butcher [Member]	Member			ul:VegetarianButcherMember
2272	Disclosure of Acquisitions and Disposals [Line Items]	LineItems			ul:DisclosureOfAcquisitionsAndDisposalsLineItems
2273	Acquisition of noncontrolling interest, percentage	Concept (Percent)	As Of		ul:PercentageOfNoncontrollingInterestAcquirable
2274	Ownership percentage	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInSubsidiary
2275	Cash consideration payable	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
2276	Acquisition percentage	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
2277	Deal completion date	Concept (Date)	For Period		ul:DateOfBusinessAcquisition
2278	Acquired/disposed business	Concept (Text/String)	For Period		ul:NameAndDescriptionOfAcquiree
2279	Deal completion date	Concept (Date)	For Period		ul:DateOfDisposals
2280	Acquired/disposed business	Concept (Text/String)	For Period		ul:DescriptionOfDisposal
2281	1167 - Disclosure - Acquisitions and Disposals - Summary of Effect of Acquisitions on Consolidated Balance Sheet (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureAcquisitionsAndDisposalsSummaryOfEffectOfAcquisitionsOnConsolidatedBalanceSheet
2282	Disclosure of Detailed Information about Business Combination [Table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
2283	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2284	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2285	Subsidiaries [member]	Member			ifrs-full:SubsidiariesMember
2286	Disclosure of Detailed Information about Business Combination [Line Items]	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
2287	Net assets acquired	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
2288	Non-controlling interest	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate
2289	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
2290	Total payment for acquisition	Concept (Monetary)	For Period	Credit	ul:PaymentForAcquisitionOfBusiness
2291	Exchange rate gain/ (loss) on cash flow hedge	Concept (Monetary)	As Of	Credit	ul:ExchangeRateGainLossOnCashFlowHedgeRecognisedAtAcquisitionDate
2292	Total consideration	Concept (Monetary)	As Of	Credit	ul:ConsiderationTransferredAndExpectedToBeTransferredAcquisitiondateFairValue
2293	1168 - Disclosure - Acquisitions and Disposals - Summary of Net Assets Acquired and Total Payment for Acquisition (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureAcquisitionsAndDisposalsSummaryOfNetAssetsAcquiredAndTotalPaymentForAcquisition
2294	Disclosure of Detailed Information about Business Combination [Table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
2295	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2296	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2297	Subsidiaries [member]	Member			ifrs-full:SubsidiariesMember
2298	Disclosure of Detailed Information about Business Combination [Line Items]	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
2299	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate
2300	Other non-current assets	Concept (Monetary)	As Of	Debit	ul:OtherNonCurrentAssetsRecognisedAsOfAcquisitionDate
2301	Trade and other receivables	Concept (Monetary)	As Of	Debit	ul:TradeAndOtherReceivablesRecognisedAsOfAcquisitionDate
2302	Other current assets	Concept (Monetary)	As Of	Debit	ul:OtherCurrentAssetsRecognisedAsOfAcquisitionDate
2303	Non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate
2304	Current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilitiesRecognisedAsOfAcquisitionDate
2305	Net assets acquired	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
2306	Non-controllinginterest	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate
2307	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
2308	Exchange rate gain/ (loss) on cash flow hedges	Concept (Monetary)	As Of	Credit	ul:ExchangeRateGainLossOnCashFlowHedgeRecognisedAtAcquisitionDate
2309	Cash consideration	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
2310	Deferred consideration	Concept (Monetary)	As Of	Credit	ul:DeferredConsiderationForAcquisitionsForTheYearDiscountedValue
2311	Total consideration	Concept (Monetary)	As Of	Credit	ul:ConsiderationTransferredAndExpectedToBeTransferredAcquisitiondateFairValue
2312	1169 - Disclosure - Acquisitions and Disposals - Summary of Impact of Disposals (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureAcquisitionsAndDisposalsSummaryOfImpactOfDisposals
2313	Implied Table	Table	*	*	implied:Table
2314	Disclosure of disposals [Abstract]	Abstract			ul:DisclosureOfDisposalsAbstract
2315	Goodwill and intangible assets	Concept (Monetary)	As Of	Debit	ul:GoodwillAndIntangibleAssetsDisposed
2316	Other non-current assets	Concept (Monetary)	For Period	Credit	ul:OtherNoncurrentAssetsDisposed
2317	Current assets	Concept (Monetary)	As Of	Debit	ul:CurrentAssetsDisposed
2318	Trade creditors and other payables	Concept (Monetary)	As Of	Credit	ul:TradeCreditorsAndOtherPayablesDisposed
2319	Net assets sold	Concept (Monetary)	As Of	Debit	ul:NetAssetsDisposed
2320	(Gain)/loss on recycling of currency retranslation on disposal	Concept (Monetary)	For Period	Credit	ul:GainLossOnRecyclingOfCurrencyRetranslationOnDisposal
2321	Profit/(loss) on sale attributable to Unilever	Concept (Monetary)	For Period	Credit	ul:GainLossOnDisposalOfGroupCompanies
2322	Consideration	Concept (Monetary)	For Period	Debit	ul:ConsiderationFromDisposal
2323	Cash	Concept (Monetary)	As Of	Debit	ul:CashConsiderationFromDisposal
2324	Cash balances of businesses sold	Concept (Monetary)	As Of	Debit	ul:CashBalancesOfBusinessesSoldConsiderationFromDisposal
2325	Non-cash items and deferred consideration	Concept (Monetary)	As Of	Debit	ul:NoncashItemsAndDeferredConsiderationFromDisposal
2326	Consideration	Concept (Monetary)	For Period	Debit	ul:ConsiderationFromDisposal
2327	1170 - Disclosure - Assets and Liabilities Held for Sale - Summary of Assets and Liabilities Classified as Held for Sale (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureAssetsAndLiabilitiesHeldForSaleSummaryOfAssetsAndLiabilitiesClassifiedAsHeldForSale
2328	Disclosure of assets and liabilities classified as held for sale [Table]	Table	*	*	ul:DisclosureOfAssetsAndLiabilitiesClassifiedAsHeldForSaleTable
2329	Assets and liabilities classified as held for sale [axis]	Axis			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis
2330	Assets and liabilities not classified as held for sale [member]	Member			ifrs-full:AssetsAndLiabilitiesNotClassifiedAsHeldForSaleMember
2331	Non-Current Assets Held for Sale [member]	Member			ifrs-full:NoncurrentAssetsHeldForSaleMember
2332	Disposal Groups Held for Sale [member]	Member			ifrs-full:DisposalGroupsClassifiedAsHeldForSaleMember
2333	Non-current Assets Held for Sale [Line Items]	LineItems			ul:NoncurrentAssetsHeldForSaleLineItems
2334	Goodwill and intangibles	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
2335	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
2336	Deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
2337	Other non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentAssets
2338	Total non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSale
2339	Current assets	Abstract			ifrs-full:CurrentAssetsAbstract
2340	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
2341	Trade and other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivables
2342	Current tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTaxAssetsCurrent
2343	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
2344	Other	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentAssets
2345	Current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
2346	Assets held for sale	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners
2347	Current liabilities	Abstract			ifrs-full:CurrentLiabilitiesAbstract
2348	Trade payables and other current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
2349	Current tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentTaxLiabilitiesCurrent
2350	Provisions	Concept (Monetary)	As Of	Credit	ifrs-full:Provisions
2351	Total current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
2352	Non-current liabilities	Abstract			ifrs-full:NoncurrentLiabilitiesAbstract
2353	Pensions and post-retirement healthcare liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:MiscellaneousOtherProvisions
2354	Provisions	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentProvisions
2355	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentFinancialLiabilities
2356	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
2357	Total non current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
2358	Liabilities held for sale	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale
2359	1171 - Disclosure - Related Party Transactions - Summary of Related Party Balances Existed with Associate or Joint Venture Businesses (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartyTransactionsSummaryOfRelatedPartyBalancesExistedWithAssociateOrJointVentureBusinesses
2360	Disclosure of Transactions between Related Parties [Table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2361	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2362	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2363	Joint Ventures Where Entity is Venturer [Member]	Member			ifrs-full:JointVenturesWhereEntityIsVenturerMember
2364	Associates [member]	Member			ifrs-full:AssociatesMember
2365	Disclosure of Transactions between Related Parties [Line Items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2366	Trading and other balances due from joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:AmountsReceivableRelatedPartyTransactions
2367	Trading and other balances due from/(to) associates	Concept (Monetary)	As Of	Debit	ul:AmountsReceivablePayableRelatedPartyTransactions
2368	1172 - Disclosure - Related Party Transactions - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartyTransactionsAdditionalInformation
2369	Disclosure of Transactions between Related Parties [Table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2370	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
2371	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
2372	Joint ventures [member]	Member			ifrs-full:JointVenturesMember
2373	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2374	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2375	Unilever FIMA LDA [member]	Member			ul:UnileverFimaLdaMember
2376	Pepsi Lipton [Member]	Member			ul:PepsiLiptonMember
2377	Langholm Capital II [Member]	Member			ul:LangholmCapitalIIMember
2378	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
2379	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
2380	Associates [member]	Member			ifrs-full:AssociatesMember
2381	Disclosure of Transactions between Related Parties [Line Items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2382	Sales revenue	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions
2383	Sale to Unilever	Concept (Monetary)	For Period	Credit	ul:SalesToGroupFromRelatedParty
2384	Balances owed by/(to) related party	Concept (Monetary)	As Of	Debit	ifrs-full:AmountsReceivableRelatedPartyTransactions
2385	Royalties and service fee paid to Unilever	Concept (Monetary)	For Period	Debit	ul:RoyaltiesAndServiceFeePaidToUnilever
2386	Investments in associates	Concept (Monetary)	As Of	Debit	ul:GrossInvestmentsInAssociates
2387	Outstanding commitments made by entity, related party transactions	Concept (Monetary)	As Of	Credit	ifrs-full:OutstandingCommitmentsMadeByEntityRelatedPartyTransactions
2388	Amount received back from associate	Concept (Monetary)	For Period	Credit	ul:AmountReceivedBackFromAssociate
2389	1173 - Disclosure - Share Buyback Programme - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureShareBuybackProgrammeAdditionalInformation
2390	Disclosure Of Share Buyback Programme [Table]	Table	*	*	ul:DisclosureOfShareBuybackProgrammeTable
2391	Parent Companies of the Group [axis]	Axis			ul:ParentCompaniesOfTheGroupAxis
2392	Parent Companies of the Group [Domain]	Member			ul:ParentCompaniesOfTheGroupDomain
2393	Unilever N.V. [member]	Member			ul:UnileverNVMember
2394	Unilever PLC [member]	Member			ul:UnileverPLCMember
2395	Disclosure of share buyback programme [line items]	LineItems			ul:DisclosureOfShareBuybackProgrammeLineItems
2396	Number of shares repurchased	Concept (Shares)	For Period		ul:NumberOfTreasurySharesRepurchased
2397	Cash consideration	Concept (Monetary)	For Period	Credit	ul:ConsiderationPaidForShareBuyBackProgramme
2398	Transfer from reserve to retained earnings	Concept (Monetary)	For Period	Debit	ul:TransferOfTreasurySharesConsiderationFromOtherReservesToRetainedProfit
2399	1174 - Disclosure - Remuneration of Auditors - Summary of Services from Auditors and its Associates (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureRemunerationOfAuditorsSummaryOfServicesFromAuditorsAndItsAssociates
2400	Disclosure of Auditors Remuneration [Table]	Table	*	*	ul:DisclosureOfAuditorsRemunerationTable
2401	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2402	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2403	Unilever Group [member]	Member			ifrs-full:ParentMember
2404	Subsidiaries [member]	Member			ifrs-full:SubsidiariesMember
2405	Disclosure of Auditors Remuneration [Line Items]	LineItems			ul:DisclosureOfAuditorsRemunerationLineItems
2406	Total statutory audit fees	Concept (Monetary)	For Period	Debit	ifrs-full:AuditorsRemunerationForAuditServices
2407	Audit-related assurance services	Concept (Monetary)	For Period	Debit	ul:AuditorRemunerationForAuditRelatedAssuranceServices
2408	Other taxation advisory services	Concept (Monetary)	For Period	Debit	ifrs-full:AuditorsRemunerationForTaxServices
2409	Services relating to corporate finance transactions	Concept (Monetary)	For Period	Debit	ul:AuditorRemunerationForFinanceTransactionsServices
2410	Other assurance services	Concept (Monetary)	For Period	Debit	ul:OtherAssuranceServices
2411	All other non-audit services	Concept (Monetary)	For Period	Debit	ifrs-full:AuditorsRemunerationForOtherServices
2412	1175 - Disclosure - Remuneration of Auditors - Summary of Services from Auditors and its Associates (Parenthetical) (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureRemunerationOfAuditorsSummaryOfServicesFromAuditorsAndItsAssociatesParenthetical
2413	Disclosure of Auditors Remuneration [Table]	Table	*	*	ul:DisclosureOfAuditorsRemunerationTable
2414	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2415	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2416	KPMG Accountants N.V. [member]	Member			ul:KPMGAccountantsNVMember
2417	KPMG LLP [member]	Member			ul:KPMGLLPMember
2418	Range [axis]	Axis			ifrs-full:RangeAxis
2419	Ranges [member]	Member			ifrs-full:RangesMember
2420	Top of range [member]	Member			ifrs-full:TopOfRangeMember
2421	Segments [axis]	Axis			ifrs-full:SegmentsAxis
2422	Segments [member]	Member			ifrs-full:SegmentsMember
2423	Review of spreads carve-out accounts [member]	Member			ul:ReviewOfSpreadsCarveoutAccountsMember
2424	Work on simplification [member]	Member			ul:WorkOnSimplificationMember
2425	Disclosure of Auditors Remuneration [Line Items]	LineItems			ul:DisclosureOfAuditorsRemunerationLineItems
2426	Total statutory audit fees	Concept (Monetary)	For Period	Debit	ifrs-full:AuditorsRemunerationForAuditServices
2427	Services supplied to associated pension schemes	Concept (Monetary)	For Period	Debit	ul:AuditorRemunerationForServicesSuppliedToAssociatedPensionSchemes
2428	Amount paid in relation to each type of non-statutory audit services	Concept (Monetary)	For Period	Debit	ifrs-full:AuditorsRemunerationForOtherServices
2429	Auditor remuneration for audits and reviews of spreads carve out financial statements	Concept (Monetary)	For Period	Debit	ul:AuditorRemunerationForAuditsAndReviewsOfSpreadsCarveOutFinancialStatements
2430	Assurance work on simplification	Concept (Monetary)	For Period	Debit	ul:AuditorRemunerationForAssuranceWorkOnSimplification
2431	1176 - Disclosure - Events After The Balance Sheet Date - Additional Information (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureEventsAfterTheBalanceSheetDateAdditionalInformation
2432	Disclosure of Non-adjusting Events after Reporting Period [Table]	Table	*	*	ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
2433	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
2434	Non-adjusting events after reporting period [member]	Member			ifrs-full:NonadjustingEventsMember
2435	Major Ordinary Share Transactions [member]	Member			ifrs-full:MajorOrdinaryShareTransactionsMember
2436	Parent Companies of the Group [axis]	Axis			ul:ParentCompaniesOfTheGroupAxis
2437	Parent Companies of the Group [Domain]	Member			ul:ParentCompaniesOfTheGroupDomain
2438	Unilever N.V. [member]	Member			ul:UnileverNVMember
2439	Unilever PLC [member]	Member			ul:UnileverPLCMember
2440	Disclosure of Non-adjusting Events after Reporting Period [Line Items]	LineItems			ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
2441	Dividend payables per share	Concept (Share)	For Period		ifrs-full:DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwnersPerShare
2442	1177 - Disclosure - Significant Subsidiaries - Schedule of Significant Subsidiaries (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureSignificantSubsidiariesScheduleOfSignificantSubsidiaries
2443	Disclosure of subsidiaries [table]	Table	*	*	ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
2444	Parent Companies of the Group [axis]	Axis			ul:ParentCompaniesOfTheGroupAxis
2445	Parent Companies of the Group [Domain]	Member			ul:ParentCompaniesOfTheGroupDomain
2446	Unilever N.V. [member]	Member			ul:UnileverNVMember
2447	Unilever PLC [member]	Member			ul:UnileverPLCMember
2448	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
2449	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
2450	Argentina [member]	Member			country:AR
2451	Australia [member]	Member			country:AU
2452	Brazil [member]	Member			country:BR
2453	Canada [member]	Member			country:CA
2454	China [member]	Member			country:CN
2455	England and Wales [member]	Member			ul:EnglandAndWalesMember
2456	France [member]	Member			country:FR
2457	Germany [Member]	Member			country:DE
2458	India [Member]	Member			country:IN
2459	Indonesia [Member]	Member			country:ID
2460	Italy [Member]	Member			country:IT
2461	Japan [member]	Member			country:JP
2462	Mexico [Member]	Member			country:MX
2463	Netherlands [Member]	Member			country:NL
2464	Pakistan [Member]	Member			country:PK
2465	Philippines [Member]	Member			country:PH
2466	Poland [member]	Member			country:PL
2467	Russia [member]	Member			country:RU
2468	Singapore [Member]	Member			country:SG
2469	South Africa [Member]	Member			country:ZA
2470	Spain [member]	Member			country:ES
2471	Switzerland [Member]	Member			country:CH
2472	Thailand [Member]	Member			country:TH
2473	Turkey [Member]	Member			country:TR
2474	United States [member]	Member			country:US
2475	Vietnam [member]	Member			country:VN
2476	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2477	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2478	Unilever de Argentina S.A [member]	Member			ul:UnileverDeArgentinaSAMember
2479	Unilever Australia Limited [member]	Member			ul:UnileverAustraliaLimitedMember
2480	Unilever Brasil Ltda. [member]	Member			ul:UnileverBrasilLimitadaMember
2481	Unilever Canada Inc [member]	Member			ul:UnileverCanadaIncMember
2482	Walls (China) Co. Ltd. [member]	Member			ul:WallsChinaCoLimitedMember
2483	Unilever Services (Hefei) Co Ltd [member]	Member			ul:UnileverServicesHefeiCoLimitedMember
2484	Unilever UK & CN Holdings Limited [member]	Member			ul:UnileverUKAndCNHoldingsLimitedMember
2485	Unilever UK Holdings Limited [member]	Member			ul:UnileverUKHoldingsLimitedMember
2486	Unilever UK Limited [member]	Member			ul:UnileverUkLimitedMember
2487	Unilever France S.A.S [member]	Member			ul:UnileverFranceMember
2488	Maizena Grundstucksverwaltung GmbH & Co. OHG [member]	Member			ul:MaizenaGrundstucksverwaltungGmbhAndCoOhgMember
2489	Pfanni GmbH & Co. OHG Stavenhagen [member]	Member			ul:PfanniGMBHAndCoOHGStavenhagenMember
2490	Unilever Deutschland GmbH [Member]	Member			ul:UnileverDeutschlandGmbHMember
2491	Unilever Deutschland Holding Gmbh [member]	Member			ul:UnileverDeutschlandHoldingGmbHMember
2492	Unilever Deutschland Produktions GmbH and Co OHG [member]	Member			ul:UnileverDeutschlandProduktionsGmbhAndCoOhgMember
2493	Hindustan Unilever Limited [Member]	Member			ul:HindustanUnileverLimitedMember
2494	P T Unilever Indonesia Tbk [Member]	Member			ul:PTUnileverIndonesiaTbkMember
2495	Unilever Italia Mkt Operations SRL [Member]	Member			ul:UnileverItaliaMktOperationsSRLMember
2496	Unilever Japan Customer Marketing K K [member]	Member			ul:UnileverJapanCustomerMarketingKKMember
2497	Unilever de Mexico S de R L de C V [Member]	Member			ul:UnileverDeMexicoSDeRLDeCVMember
2498	Mixhold BV [member]	Member			ul:MixholdBvMember
2499	Unilever Finance International B V [member]	Member			ul:UnileverFinanceInternationalBVMember
2500	Unilever Nederland B V [member]	Member			ul:UnileverNederlandBVMember
2501	UNUS Holding BV [member]	Member			ul:UnusHoldingBvMember
2502	Unilever Pakistan Limited [Member]	Member			ul:UnileverPakistanLimitedMember
2503	Unilever Philippines, Inc. [Member]	Member			ul:UnileverPhilippinesIncMember
2504	Unilever Polska Sp. z o.o. [Member]	Member			ul:UnileverPolskaSpzooMember
2505	OOO Unilever Rus [member]	Member			ul:OOOUnileverRusMember
2506	Unilever Asia Private Limited [Member]	Member			ul:UnileverAsiaPrivateLimitedMember
2507	Unilever South Africa (Pty) Limited [member]	Member			ul:UnileverSouthAfricaPtyLimitedMember
2508	Unilever Espana S.A. [member]	Member			ul:UnileverEspanaSAMember
2509	Unilever ASCC AG [member]	Member			ul:UnileverASCCAGMember
2510	Unilever Finance International AG [Member]	Member			ul:UnileverFinanceInternationalAGMember
2511	Unilever Supply Chain Company AG [member]	Member			ul:UnileverSupplyChainCompanyAGMember
2512	Unilever Thai Trading Limited [member]	Member			ul:UnileverThaiTradingLimitedMember
2513	Unilever Sanayi ve Ticaret Turk AS [Member]	Member			ul:UnileverSanayiveTicaretTurkASMember
2514	Conopco, Inc [member]	Member			ul:ConopcoIncMember
2515	Unilever Capital Corporation [member]	Member			ul:UnileverCapitalCorporationMember
2516	Unilever United States, Inc [member]	Member			ul:UnileverUnitedStatesIncMember
2517	Unilever Vietnam International Company Limited [member]	Member			ul:UnileverVietnamInternationalCompanyLimitedMember
2518	Disclosure of subsidiaries [line items]	LineItems			ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
2519	Country of Incorporation	Concept (Text/String)	For Period		ifrs-full:CountryOfIncorporationOrResidenceOfSubsidiary
2520	Name of subsidiary	Concept (Text/String)	For Period		ifrs-full:NameOfSubsidiary
2521	Percentage interest in subsidiary	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInSubsidiary
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2523	Condensed Financial Statements [Table]	Table	*	*	us-gaap:ScheduleOfCondensedFinancialStatementsTable
2524	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2525	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
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2527	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
2528	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
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2533	Top of range [member]	Member			ifrs-full:TopOfRangeMember
2534	Supplemental Guarantor Information [line items]	LineItems			ul:SupplementalGuarantorInformationLineItems
2535	Ownership percentage	Concept (Percent)	For Period		ul:PercentageOfOwnershipByParentEntities
2536	Borrowings outstanding amount	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
2537	Interest rate of borrowings	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
2538	1179 - Disclosure - Guarantor Statements - Income Statement (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureGuarantorStatementsIncomeStatement
2539	Condensed Financial Statements [Table]	Table	*	*	us-gaap:ScheduleOfCondensedFinancialStatementsTable
2540	Consolidated and separate financial statements [axis]	Axis			ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
2541	Consolidated [member]	Member			ifrs-full:ConsolidatedMember
2542	Eliminations [member]	Member			ul:EliminationsMember
2543	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2544	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2545	Unilever Capital Corporation Subsidiary Issuer [member]	Member			ul:UnileverCapitalCorporationSubsidiaryIssuerMember
2546	Unilever Parent Entities [member]	Member			ul:UnileverParentEntitiesMember
2547	Unilever United States Inc Subsidiary Guarantor [member]	Member			ul:UnileverUnitedStatesIncSubsidiaryGuarantorMember
2548	Non-guarantor Subsidiaries [member]	Member			ul:NonguarantorSubsidiaries1Member
2549	Unilever Group [member]	Member			ul:UnileverGroupMember
2550	Disclosure of income statement [Line Items]	LineItems			ul:DisclosureOfIncomeStatementLineItems
2551	Turnover	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
2552	Operating profit	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromOperatingActivities
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2554	Pensions and similar obligations	Concept (Monetary)	For Period	Debit	ul:InterestOnPensionsAndOtherSimilarObligations
2555	Other income/(losses)	Concept (Monetary)	For Period	Credit	ul:AdjustmentsForShareOfNetProfitOnJointVenturesOrAssociatesAndOtherIncomeLossFromNonCurrentInvestmentsAndAssociates
2556	Premium paid on buyback of preference shares	Concept (Monetary)	For Period	Debit	ul:PremiumPaidOnBuyBackOfPreferenceShares
2557	Net monetary gain arising from hyperinflationary economies	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnNetMonetaryPosition
2558	Profit before taxation	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
2559	Taxation	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
2560	Net profit before subsidiaries	Concept (Monetary)	For Period	Credit	ul:NetProfitBeforeSubsidiaries
2561	Equity earnings of subsidiaries	Concept (Monetary)	For Period	Credit	ul:ProfitLossAttributableToSubsidiaries
2562	Net profit	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
2563	Attributable to:	Abstract			ifrs-full:ProfitLossAttributableToAbstract
2564	Non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToNoncontrollingInterests
2565	Shareholders' equity	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
2566	Other comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
2567	Total comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
2568	1180 - Disclosure - Guarantor Statements - Balance Sheet (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureGuarantorStatementsBalanceSheet
2569	Condensed Financial Statements [Table]	Table	*	*	us-gaap:ScheduleOfCondensedFinancialStatementsTable
2570	Consolidated and separate financial statements [axis]	Axis			ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
2571	Consolidated [member]	Member			ifrs-full:ConsolidatedMember
2572	Eliminations [member]	Member			ul:EliminationsMember
2573	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2574	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2575	Unilever Capital Corporation Subsidiary Issuer [member]	Member			ul:UnileverCapitalCorporationSubsidiaryIssuerMember
2576	Unilever Parent Entities [member]	Member			ul:UnileverParentEntitiesMember
2577	Unilever United States Inc Subsidiary Guarantor [member]	Member			ul:UnileverUnitedStatesIncSubsidiaryGuarantorMember
2578	Non-guarantor Subsidiaries [member]	Member			ul:NonguarantorSubsidiaries1Member
2579	Unilever Group [member]	Member			ul:UnileverGroupMember
2580	Disclosure of balance sheet [line items]	LineItems			ul:DisclosureOfBalanceSheetLineItems
2581	Assets	Abstract			ifrs-full:AssetsAbstract
2582	Non-current assets	Abstract			ifrs-full:NoncurrentAssetsAbstract
2583	Goodwill and intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
2584	Deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
2585	Other non-current assets	Concept (Monetary)	As Of	Debit	ul:OtherNonCurrentAssetsOther
2586	Amounts due from group companies	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentReceivablesDueFromRelatedParties
2587	Net assets of subsidiaries (equity accounted)	Concept (Monetary)	As Of	Debit	ul:NetAssetsOfSubsidiaries
2588	Total non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
2589	Current assets	Abstract			ifrs-full:CurrentAssetsAbstract
2590	Amounts due from group companies	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
2591	Trade and other current receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivables
2592	Current tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTaxAssetsCurrent
2593	Other current assets	Concept (Monetary)	As Of	Debit	ul:OtherCurrentAssetsOther
2594	Current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
2595	Total assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
2596	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
2597	Current liabilities	Abstract			ifrs-full:CurrentLiabilitiesAbstract
2598	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentFinancialLiabilities
2599	Amounts due to group companies	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
2600	Trade payables and other current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
2601	Current tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentTaxLiabilitiesCurrent
2602	Other current liabilities	Concept (Monetary)	As Of	Credit	ul:OtherCurrentLiabilitiesOther
2603	Total current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
2604	Non-current liabilities	Abstract			ifrs-full:NoncurrentLiabilitiesAbstract
2605	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentFinancialLiabilities
2606	Amounts due to group companies	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPayablesToRelatedParties
2607	Pensions and post-retirement healthcare liabilities:	Abstract			ifrs-full:NoncurrentProvisionsAbstract
2608	Funded schemes in deficit	Concept (Monetary)	As Of	Credit	ul:FundedBenefitObligation
2609	Unfunded schemes	Concept (Monetary)	As Of	Credit	ul:UnfundedBenefitObligation
2610	Other non-current liabilities	Concept (Monetary)	As Of	Credit	ul:OtherNoncurrentLiabilitiesOther
2611	Total non current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
2612	Total liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
2613	Shareholders' equity	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAttributableToOwnersOfParent
2614	Non-controlling interests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
2615	Total equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
2616	Total liabilities and equity	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAndLiabilities
2617	1181 - Disclosure - Guarantor Statements - Cash Flow (Detail)	Network	*	*	http://imetrix.edgar-online.com/taxonomy/role/DisclosureGuarantorStatementsCashFlow
2618	Condensed Financial Statements [Table]	Table	*	*	us-gaap:ScheduleOfCondensedFinancialStatementsTable
2619	Consolidated and separate financial statements [axis]	Axis			ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
2620	Consolidated [member]	Member			ifrs-full:ConsolidatedMember
2621	Eliminations [member]	Member			ul:EliminationsMember
2622	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2623	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2624	Unilever Capital Corporation Subsidiary Issuer [member]	Member			ul:UnileverCapitalCorporationSubsidiaryIssuerMember
2625	Unilever Parent Entities [member]	Member			ul:UnileverParentEntitiesMember
2626	Unilever United States Inc Subsidiary Guarantor [member]	Member			ul:UnileverUnitedStatesIncSubsidiaryGuarantorMember
2627	Non-guarantor Subsidiaries [member]	Member			ul:NonguarantorSubsidiaries1Member
2628	Unilever Group [member]	Member			ul:UnileverGroupMember
2629	Disclosure Of Cash Flow Statement [Line Items]	LineItems			ul:DisclosureOfCashFlowStatementLineItems
2630	Net cash flow from/(used in) operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
2631	Net cash flow from/(used in) investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivities
2632	Net cash flow from/(used in) financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivities
2633	Net increase/(decrease) in cash and cash equivalents	Concept (Monetary)	For Period	Debit	ul:NetIncreaseDecreaseInCashAndCashEquivalents
2634	Cash and cash equivalents at beginning of year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
2635	Effect of foreign exchange rates	Concept (Monetary)	For Period	Debit	ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
2636	Cash and cash equivalents at end of year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition