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v3.20.2

Goodwill and acquisitions - Cash-generating Units (CGUs) with Significant Goodwill (Detail) - GBP (£) £ in Millions | Jun. 30, 2020 | Dec. 31, 2019 | Jun. 30, 2019
--- | --- | --- | ---
Disclosure of information for cash-generating units [line items] |  |  |
Goodwill | £ 8,120.2 | £ 10,170.7 | £ 13,252.1
Brands with an indefinite useful life | 1,129.8 | 1,078.2 |
GroupM [member] |  |  |
Disclosure of information for cash-generating units [line items] |  |  |
Goodwill | 3,072.2 | 2,936.0 |
Wunderman Thompson [member] |  |  |
Disclosure of information for cash-generating units [line items] |  |  |
Goodwill | 1,167.2 | 2,138.9 |
Brands with an indefinite useful life | 433.3 | 409.7 |
VMLY&R [member] |  |  |
Disclosure of information for cash-generating units [line items] |  |  |
Goodwill | 460.6 | 901.0 |
Brands with an indefinite useful life | 203.6 | 199.1 |
Ogilvy [Member] |  |  |
Disclosure of information for cash-generating units [line items] |  |  |
Goodwill | 828.1 | 762.9 |
Brands with an indefinite useful life | 218.5 | 211.1 |
Burson Cohn Wolfe [member] |  |  |
Disclosure of information for cash-generating units [line items] |  |  |
Goodwill | 651.3 | 741.4 |
Brands with an indefinite useful life | 138.0 | 130.2 |
Other [member] |  |  |
Disclosure of information for cash-generating units [line items] |  |  |
Goodwill | 1,940.8 | 2,690.5 |
Brands with an indefinite useful life | £ 136.4 | £ 128.1 |

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