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Other intangible assets - Disclosure of other intangilble asset (Detail) - GBP (£) £ in Millions | Jun. 30, 2020 | Dec. 31, 2019 | Jun. 30, 2019
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Disclosure of detailed information about intangible assets [line items] |  |  |
Other Intangible Assets | £ 1,488.9 | £ 1,468.8 | £ 1,786.2
Brands with an indefinite useful life [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Other Intangible Assets | 1,129.8 | 1,078.2 | 1,141.2
Acquired intangibles [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Other Intangible Assets | 284.4 | 323.6 | 530.4
Other [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Other Intangible Assets | £ 74.7 | £ 67.0 | £ 114.6

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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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- Definition The amount of identifiable non-monetary assets without physical substance. This amount does not include goodwill. [Refer: Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2019-01-01 -Paragraph 118 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2019-en-r&anchor=para_118_e&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_c&doctype=Standard -URIDate 2019-03-27 + Details
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