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Other intangible assets - Movements of Other Intangible Assets (Detail) - GBP (£) £ in Millions | Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2018
--- | --- | --- | ---
Disclosure of detailed information about intangible assets [line items] |  |  |
Other intangibles | £ 1,786.2 | £ 1,842.0 | £ 1,936.7
Brands with an indefinite useful life [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Other intangibles | 1,141.2 | 1,132.8 | 1,086.7
Acquired intangibles [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Other intangibles | 530.4 | 594.8 | 747.5
Other [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Other intangibles | £ 114.6 | £ 114.4 | £ 102.5

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