XML 144 R137.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Treasury Risk Management - Summary of Derivative Cash Flow Hedges (Detail) - EUR (€) € in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Disclosure Of Derivative Cash Flow Hedges [Line Items] |  |
Foreign exchange cash inflows | € 3,510 | € 2,863
Foreign exchange cash outflows | (3,536) | (2,905)
Interest rate cash flows | (24) | (2)
Commodity contracts cash flows | (19) | (3)
Within 1 year [Member] |  |
Disclosure Of Derivative Cash Flow Hedges [Line Items] |  |
Foreign exchange cash inflows | 3,510 | 2,863
Foreign exchange cash outflows | (3,536) | (2,905)
Interest rate cash flows | 30 | 4
Commodity contracts cash flows | (19) | (3)
Due between 1 and 2 years [Member] |  |
Disclosure Of Derivative Cash Flow Hedges [Line Items] |  |
Interest rate cash flows | 45 | (6)
Due between 2 and 3 years [Member] |  |
Disclosure Of Derivative Cash Flow Hedges [Line Items] |  |
Interest rate cash flows | (26) |
Due between 3 and 4 years [Member] |  |
Disclosure Of Derivative Cash Flow Hedges [Line Items] |  |
Interest rate cash flows | 31 |
Due between 4 and 5 years [Member] |  |
Disclosure Of Derivative Cash Flow Hedges [Line Items] |  |
Interest rate cash flows | (44) |
Later than 5 years [Member] |  |
Disclosure Of Derivative Cash Flow Hedges [Line Items] |  |
Interest rate cash flows | (60) |
Net Carrying Amount [Member] |  |
Disclosure Of Derivative Cash Flow Hedges [Line Items] |  |
Foreign exchange cash outflows | (8) | (40)
Interest rate cash flows | (351) |
Commodity contracts cash flows | € (7) | € 18

X
- Definition Commodity contracts cash flows. + References No definition available. + Details
Name: | ul_CommodityContractsCashFlows
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Disclosure of derivative cash flow hedges. + References No definition available. + Details
Name: | ul_DisclosureOfDerivativeCashFlowHedgesLineItems
Namespace Prefix: | ul_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Foreign exchange cash inflows. + References No definition available. + Details
Name: | ul_ForeignExchangeCashInflows
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Foreign exchange cash outflows. + References No definition available. + Details
Name: | ul_ForeignExchangeCashOutflows
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Interest rate cash flows. + References No definition available. + Details
Name: | ul_InterestRateCashFlows
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis=ul_NetCarryingAmountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |