XML 313 R163.htm IDEA: XBRL DOCUMENT
v3.20.4

Commitments and Contingent Liabilities - Summary of Potential Future Lease Commitments and Other Commitments Fall Due (Detail) - EUR (€) € in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure Of Lease And Other Commitments [Line Items] |  |
Leases | € 158 | € 223
Other commitments | 1,556 | 1,498
Within 1 year [Member] |  |
Disclosure Of Lease And Other Commitments [Line Items] |  |
Leases | 69 | 69
Other commitments | 844 | 791
Later than 1 year but not later than 5 years [Member] |  |
Disclosure Of Lease And Other Commitments [Line Items] |  |
Leases | 80 | 111
Other commitments | 694 | 684
Later than 5 years [Member] |  |
Disclosure Of Lease And Other Commitments [Line Items] |  |
Leases | 9 | 43
Other commitments | € 18 | € 23

X
- Definition Disclosure Of Lease And Other Commitments [Line Items] + References No definition available. + Details
Name: | ul_DisclosureOfLeaseAndOtherCommitmentsLineItems
Namespace Prefix: | ul_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum lease payments payable under noncancellable lease. + References No definition available. + Details
Name: | ul_MinimumLeasePaymentsPayableUnderNoncancellableLease
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Other commitments. + References No definition available. + Details
Name: | ul_OtherCommitments
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_LaterThanOneYearAndNotLaterThanFiveYearsMember
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: |