XML 80 R73.htm IDEA: XBRL DOCUMENT v3.8.0.1

Employees - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018 GBP (£)	Dec. 31, 2017 EUR (€) Sk	Dec. 31, 2017 GBP (£)	Dec. 31, 2016 EUR (€)
Disclosure of Pension Plans [Line Items]
Defined benefit liabilities		13.00%	13.00%
Actual return on plan assets		€ 2,015,000,000		€ 2,541,000,000
Actual return on plan assets		1,475,000,000
Interest income		540,000,000
Property occupied by Unilever		€ 1,467,000,000		1,461,000,000
Pension Liabilities [member]
Disclosure of Pension Plans [Line Items]
Defined benefit liabilities		96.00%	96.00%
Special benefits trust [member]
Disclosure of Pension Plans [Line Items]
Excluded plan assets		€ 63,000,000		79,000,000
Escrow [member]
Disclosure of Pension Plans [Line Items]
Excluded plan assets				68,000,000
Unilever [member]
Disclosure of Pension Plans [Line Items]
Equity securities		14,000,000		12,000,000
Property occupied by Unilever		€ 32,000,000		€ 34,000,000
Percentage of plan assets in equity securities		0.10%		0.10%
United Kingdom [member]
Disclosure of Pension Plans [Line Items]
Percentage of long term trend future improvements		1.00%	1.00%
2016 CMI core projections (Sk) | Sk		7.5
United Kingdom [member] | Interest Rate Risk [Member]
Disclosure of Pension Plans [Line Items]
Degree of hedging of liabilities, percentage		45.00%	45.00%	35.00%
Netherlands [member] | Interest Rate Risk [Member]
Disclosure of Pension Plans [Line Items]
Degree of hedging of liabilities, percentage		30.00%	30.00%	35.00%
Defined benefit plans [member]
Disclosure of Pension Plans [Line Items]
Current estimated group employer contributions, payable in 2017 excluding UK pension fund deficit contributions | £	£ 0		£ 600,000,000
Other post-employment benefit plans [member]
Disclosure of Pension Plans [Line Items]
Period of level of medical cost inflation		5 years	5 years
Other post-employment benefit plans [member] | Bottom of range [member]
Disclosure of Pension Plans [Line Items]
Rate of level of medical cost inflation		7.00%
Liabilities [member]
Disclosure of Pension Plans [Line Items]
Defined benefit liabilities		85.00%	85.00%

X

- Definition

Medical cost trend rate used as significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2016-01-13
-Paragraph 144
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2016-03-30&anchor=para_144&doctype=Standard
-URIDate 2016-03-31

+ Details

Name:	ifrs-full_ActuarialAssumptionOfMedicalCostTrendRates
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The amount of employer contributions to retirement benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 26
-IssueDate 2016-01-13
-Paragraph 35
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=26&date=2016-03-30&anchor=para_35_b_i&doctype=Standard
-URIDate 2016-03-31

+ Details

Name:	ifrs-full_EmployerContributions
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of instruments held by the entity that provide evidence of a residual interest in the assets of another entity after deducting all of its liabilities.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2016-01-13
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_55&doctype=Standard
-URIDate 2016-03-31

+ Details

Name:	ifrs-full_EquityInstrumentsHeld
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount that real estate constitutes of the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 19
-IssueDate 2016-01-13
-Paragraph 142
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2016-03-30&anchor=para_142_d&doctype=Standard
-URIDate 2016-03-31

+ Details

Name:	ifrs-full_PropertyAmountContributedToFairValueOfPlanAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Actual return on plan assets.

+ References

No definition available.

+ Details

Name:	ul_ActualReturnOnPlanAssets
Namespace Prefix:	ul_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Actuarial assumption of medical cost trend period.

+ References

No definition available.

+ Details

Name:	ul_ActuarialAssumptionOfMedicalCostTrendPeriod
Namespace Prefix:	ul_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Asset Returns.

+ References

No definition available.

+ Details

Name:	ul_AssetReturns
Namespace Prefix:	ul_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Defined Benefit Plans As A Percentage Of Pension Liabilities

+ References

No definition available.

+ Details

Name:	ul_DefinedBenefitPlansAsAPercentageOfPensionLiabilities
Namespace Prefix:	ul_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Degree of hedging of liabilities, percentage.

+ References

No definition available.

+ Details

Name:	ul_DegreeOfHedgingOfLiabilitiesPercentage
Namespace Prefix:	ul_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Description of growth rate used to forecast cash flow projections

+ References

No definition available.

+ Details

Name:	ul_DescriptionOfGrowthRateUsedToForecastCashFlowProjections
Namespace Prefix:	ul_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Disclosure of pension plan.

+ References

No definition available.

+ Details

Name:	ul_DisclosureOfPensionPlansLineItems
Namespace Prefix:	ul_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Excluded pension assets.

+ References

No definition available.

+ Details

Name:	ul_ExcludedPensionAssets
Namespace Prefix:	ul_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Interest income on plan assets.

+ References

No definition available.

+ Details

Name:	ul_InterestIncomeOnPlanAssets
Namespace Prefix:	ul_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Coverage out of the total defined benefit liabilities represented by the other major plans, which have their liabilities updated each year.

+ References

No definition available.

+ Details

Name:	ul_PercentageOfDefinedBenefitPensionLiabilitiesUpdatedAnnually
Namespace Prefix:	ul_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Coverage out of the total defined benefit liabilities represented by the most important plans, which are formally valued every year.

+ References

No definition available.

+ Details

Name:	ul_PercentageOfDefinedBenefitPensionLiabilitiesValuedAnnually
Namespace Prefix:	ul_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of long term trend future improvements.

+ References

No definition available.

+ Details

Name:	ul_PercentageOfLongTermTrendFutureImprovements
Namespace Prefix:	ul_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of plan assets.

+ References

No definition available.

+ Details

Name:	ul_PercentageOfPlanAssets
Namespace Prefix:	ul_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	ifrs-full_ClassesOfLiabilitiesAxis=ul_PensionLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=ul_SpecialBenefitsTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=ul_EscrowMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CounterpartiesAxis=ul_UnileverMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_GeographicalAreasAxis=country_GB
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_InterestRateRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_GeographicalAreasAxis=country_NL
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_DefinedBenefitPlansAxis=ul_DefinedBenefitPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ul_RetirementBenefitPlansTypeAxis=ul_OtherPostEmploymentBenefitPlansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_NetDefinedBenefitLiabilityAssetAxis=ifrs-full_PresentValueOfDefinedBenefitObligationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: