XML 58 R50.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Share Buyback Programme - Additional Information (Detail) - EUR (€) |  | 6 Months Ended
--- | --- | ---
Apr. 19, 2018 | Jun. 30, 2018
Equity [abstract] |  |
Share buyback programme amount | € 6,000,000,000 |
Number of shares repurchased |  | 53,040,783
Shares repurchased amount |  | € 2,514,000,000
Cash consideration |  | 2,246,000,000
Unpaid consideration |  | € 268,000,000

X
- References No definition available. + Details
Name: | ifrs-full_EquityAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Consideration for share buy back programme. + References No definition available. + Details
Name: | ul_ConsiderationForShareBuyBackProgramme
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Consideration paid for share buy back programme. + References No definition available. + Details
Name: | ul_ConsiderationPaidForShareBuyBackProgramme
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Maximum value for announced share buyback programme. + References No definition available. + Details
Name: | ul_MaximumValueForAnnouncedShareBuybackProgramme
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of treasury shares repurchased. + References No definition available. + Details
Name: | ul_NumberOfTreasurySharesRepurchased
Namespace Prefix: | ul_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition UnPaid consideration included within current financial liabilities. + References No definition available. + Details
Name: | ul_UnpaidConsiderationIncludedWithinCurrentFinancialLiabilities
Namespace Prefix: | ul_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant