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Our people - Reportable Segment Distribution of Staff (Detail) - Employees | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of operating segments [line items] |  |  |
Average number of staff | 132,823 | 133,903 | 134,428
Global Integrated Agencies [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Average number of staff | 82,295 | 83,015 | 81,537
Data investment management [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Average number of staff | 26,325 | 27,813 | 28,014
Public relations [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Average number of staff | 6,890 | 6,891 | 6,899
Specialist agencies [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Average number of staff | 17,313 | 16,184 | 17,978

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- Definition The average number of personnel employed by the entity during a period. + 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 Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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