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Share of results of associates - Additional Information (Detail) - GBP (£) £ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Kantar [member] |  |
Disclosure of associates [line items] |  |
Share of exceptional losses of associates | £ 11.7 | £ (51.4)

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

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- Definition Share of exceptional gains (losses) of associates. + References No definition available. + Details
Name: | wpp_ShareOfExceptionalGainsLossesOfAssociates
Namespace Prefix: | wpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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