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Provisions for liabilities and charges - Additional Information (Details) - GBP (£) £ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of other provisions [abstract] |  |  |
Legal proceedings provision | £ 132 | £ 35 |
Charged to the income statement | 129 | 90 |
Legal provision charges/(gains) | 68 | £ (11) | £ 0
Expected provision to be settled in less than one year | 123 |  |
Expected provision to be settled in more than one year | £ 9 |  |

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- References No definition available. + Details
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Namespace Prefix: | ifrs-full_
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Balance Type: | na
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- Definition The amount of provision for legal proceedings. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 37 -IssueDate 2024-01-01 -Section Example 10 A court case -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&doctype=Illustrative%20Examples&dita_xref=IAS37_IE_C_ex10_TI -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 37 -IssueDate 2024-01-01 -Paragraph 87 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_87&doctype=Standard -URIDate 2024-03-27 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of additional provisions. + References No definition available. + Details
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Namespace Prefix: | wpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Expected Current, Other Provision Settled + References No definition available. + Details
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Namespace Prefix: | wpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Expected Non-Current, Other Provision Settled + References No definition available. + Details
Name: | wpp_ExpectedNonCurrentOtherProvisionSettled
Namespace Prefix: | wpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The gains and losses on litigation settlements. + References No definition available. + Details
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Namespace Prefix: | wpp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration