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v3.19.2

Post balance sheet events - Additional Information (Detail) - Events After Reporting Period [member] - Kantar [member] £ in Billions | Jul. 09, 2019 GBP (£)
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Statement [LineItems] |
Percentage to be sold of proposed sale | 60.00%
Percentage of ownership after proposed sale | 40.00%
Proceeds from proposed sale | £ 3.1

X
- Definition Approximate Consideration From Proposed Sale After Tax and Disposal Costs. + References No definition available. + Details
Name: | wpp_ApproximateConsiderationFromProposedSaleAfterTaxAndDisposalCosts
Namespace Prefix: | wpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of ownership after proposed sale. + References No definition available. + Details
Name: | wpp_PercentageOfOwnershipAfterProposedSale
Namespace Prefix: | wpp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage to be sold of proposed sale. + References No definition available. + Details
Name: | wpp_PercentageToBeSoldOfProposedSale
Namespace Prefix: | wpp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | wpp_StatementLineItems
Namespace Prefix: | wpp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=wpp_EventsAfterReportingPeriodMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | wpp_DisposalsAxis=wpp_KantarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |