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Cash and cash equivalents - Additional information (Details) - GBP (£) £ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Cash And Cash Equivalents And Adjusted Net Debt [Abstract] |  |
Restricted cash and cash equivalents | £ 38 | £ 34

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- Definition The amount of cash and cash equivalents whose use or withdrawal is restricted. [Refer: Cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_RestrictedCashAndCashEquivalents
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Cash And Cash Equivalents And Adjusted Net Debt + References No definition available. + Details
Name: | wpp_CashAndCashEquivalentsAndAdjustedNetDebtAbstract
Namespace Prefix: | wpp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration