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Costs of services and general and administrative costs - Auditor's Remuneration (Detail) (Parenthetical) £ in Millions | 12 Months Ended
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Dec. 31, 2019 GBP (£)
Other Services [member] |
Disclosure Of Information About Operating Cost [line items] |
Auditors remuneration includes true up | £ 3.5

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- Definition Auditors remuneration includes true up. + References No definition available. + Details
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Namespace Prefix: | wpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Disclosure of information about operating cost line items. + References No definition available. + Details
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Namespace Prefix: | wpp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |