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Costs of services and general and administrative costs - Auditor's Remuneration (Detail) - GBP (£) £ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure Of Information About Operating Cost [line items] |  |  |  |  |
Other services |  | £ 5.0 | £ 4.2 |  | £ 4.0
Fees payable to the auditors pursuant to legislation |  | 34.5 | 30.8 |  | 26.1
Total non-audit fees |  | 8.2 | 4.8 |  | 4.8
Total fees |  | 42.7 | 35.6 |  | 30.9
Advisory services [member] |  |  |  |  |
Disclosure Of Information About Operating Cost [line items] |  |  |  |  |
Auditors' remuneration for tax services |  | 0.0 |  |  | 0.1
Compliance services [member] |  |  |  |  |
Disclosure Of Information About Operating Cost [line items] |  |  |  |  |
Auditors' remuneration for tax services |  | 0.0 | 0.1 |  | 0.1
Other services [member] |  |  |  |  |
Disclosure Of Information About Operating Cost [line items] |  |  |  |  |
Other services | [1] | 8.2 | 4.7 |  | 4.6
WPP plc [member] |  |  |  |  |
Disclosure Of Information About Operating Cost [line items] |  |  |  |  |
Auditors' remuneration for audit services |  | 1.5 | 1.4 |  | 1.4
Subsidiaries [member] |  |  |  |  |
Disclosure Of Information About Operating Cost [line items] |  |  |  |  |
Auditors' remuneration for audit services |  | £ 28.0 | £ 25.2 | [1] | £ 20.7
[1] | Includes a true-up of £3.5 million.

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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 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
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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 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
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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 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + 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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- Definition Auditors' remuneration for non-audit fees. + References No definition available. + Details
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- Details
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- Details
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- Details
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