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Costs of services and general and administrative costs - Summary of Auditor's Remuneration (Details) - GBP (£) £ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure Of Information About Operating Cost [line items] |  |  |
Audit-related services | £ 1 | £ 1 | £ 0
Fees payable to the auditors pursuant to legislation | 44 | 40 | 37
Total other fees | 2 | 2 | 1
Total fees | 46 | 42 | 38
Pwc |  |  |
Disclosure Of Information About Operating Cost [line items] |  |  |
Other assurance services | 0 | 0 | 0
Deloitte |  |  |
Disclosure Of Information About Operating Cost [line items] |  |  |
Other assurance services | 1 | 1 | 1
Compliance services |  |  |
Disclosure Of Information About Operating Cost [line items] |  |  |
Tax compliance services | 0 | 0 | 0
WPP plc |  |  |
Disclosure Of Information About Operating Cost [line items] |  |  |
Audit-related services | 18 | 10 | 8
Subsidiaries |  |  |
Disclosure Of Information About Operating Cost [line items] |  |  |
Audit-related services | £ 26 | £ 30 | £ 29

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- Definition The amount of fees paid or payable to the entity's auditors. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition The amount of fees paid or payable to the entity's auditors for auditing services. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of fees paid or payable to the entity's auditors for services that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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Period Type: | duration

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- Definition The amount of fees paid or payable to the entity's auditors for tax services. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Auditors' remuneration for fees payable to auditors pursuant to legislation. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Auditors' remuneration for non-audit fees. + References No definition available. + Details
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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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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Balance Type: |
Period Type: |

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- Details
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Period Type: |

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- Details
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- Details
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