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

The amount of fees paid or payable to the entity's auditors.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 112
-Subparagraph c
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-URIDate 2024-03-27

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- Definition

The amount of fees paid or payable to the entity's auditors for auditing services.

+ References

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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

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- Definition

The amount of fees paid or payable to the entity's auditors for tax services.

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- Definition

Auditors' remuneration for fees payable to auditors pursuant to legislation.

+ References

No definition available.

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Auditors' remuneration for non-audit fees.

+ References

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- Definition

Disclosure of information about operating cost line items.

+ References

No definition available.

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