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Related party transactions - Additional information (Detail) - Associates - GBP (£) £ in Millions | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022
Kantar |  |
Disclosure of transactions between related parties [line items] |  |
Revenue from sale of goods, related party transactions | £ 6.6 | £ 7.4
USA | Compas |  |
Disclosure of transactions between related parties [line items] |  |
Revenue from sale of goods, related party transactions | £ 111.8 | £ 82.7

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of revenue arising from the sale of goods in related party transactions. [Refer: Revenue; Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 24 -IssueDate 2022-03-24 -Paragraph 21 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2022-en-r&anchor=para_21_a&doctype=Standard -URIDate 2022-03-24 + 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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