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REVENUE AND SEGMENT INFORMATION - Analysis of revenue and adjusted operating profit by geographical segment (Details) £ in Millions |  | 6 Months Ended
--- | --- | ---
Jan. 08, 2026 | Jun. 30, 2026 GBP (£) | Jun. 30, 2025 GBP (£)
Disclosure of operating segments [line items] |  |  |
Number of geographical operating units | 6 | 6 |
Number of reportable segments |  | 4 |
Revenue |  | £ 5,602 | £ 5,480
Group operating profit |  | 1,172 | 1,203
Reconciling items between Group operating profit and Group adjusted operating profit |  | 192 | 40
Adjusted operating profit |  | 1,364 | 1,243
Restructuring costs |  | 169 | 26
North America |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue |  | 1,830 | 1,851
Adjusted operating profit |  | 425 | 389
Europe |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue |  | 1,631 | 1,556
Adjusted operating profit |  | 522 | 441
APAC |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue |  | 1,182 | 1,149
Adjusted operating profit |  | 292 | 274
International |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue |  | 959 | 924
Adjusted operating profit |  | 193 | 172
Corporate and other unallocated |  |  |
Disclosure of operating segments [line items] |  |  |
Adjusted operating profit |  | (68) | (33)
Net amortisation and impairment of intangible assets excluding computer software and impairment (reversal of impairment) of goodwill |  | 28 | 26
Restructuring costs |  | £ 169 | £ 26

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