Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-31 |
As at 2023-12-31 |
|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||
| Property, plant and equipment [abstract] | ||
| Property, plant and equipment |
589,000,000
GBP
|
893,000,000
GBP
|
| Intangible assets and goodwill [abstract] | ||
| Intangible assets and goodwill |
1,156,000,000
GBP
|
1,271,000,000
GBP
|
| Investments accounted for using equity method [abstract] | ||
| Investments accounted for using equity method |
21,000,000
GBP
|
21,000,000
GBP
|
| Trade and other non-current receivables [abstract] | ||
| Trade and other non-current receivables |
34,000,000
GBP
|
49,000,000
GBP
|
| Miscellaneous non-current assets [abstract] | ||
| Non-current net defined benefit asset |
36,000,000
GBP
|
84,000,000
GBP
|
| Non-current derivative financial assets |
—
GBP
|
1,000,000
GBP
|
| Trade and other current receivables [abstract] | ||
| Trade and other current receivables |
829,000,000
GBP
|
835,000,000
GBP
|
| Categories of non-current financial assets [abstract] | ||
| Non-current financial assets at fair value through other comprehensive income [abstract] | ||
| Non-current financial assets at fair value through other comprehensive income |
4,000,000
GBP
|
1,000,000
GBP
|
| Classes of current inventories [abstract] | ||
| Current inventories |
1,935,000,000
GBP
|
2,718,000,000
GBP
|
| Classes of current inventories, alternative [abstract] | ||
| Cash and cash equivalents [abstract] | ||
| Cash equivalents [abstract] | ||
| Short-term deposits, classified as cash equivalents |
91,000,000
GBP
|
79,000,000
GBP
|
| Cash and cash equivalents |
549,000,000
GBP
|
689,000,000
GBP
|
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | ||
| Non-current assets or disposal groups classified as held for sale |
20,000,000
GBP
|
14,000,000
GBP
|
| Miscellaneous current assets [abstract] | ||
| Current derivative financial assets |
48,000,000
GBP
|
38,000,000
GBP
|
| Miscellaneous assets [abstract] | ||
| Cash and bank balances at central banks |
458,000,000
GBP
|
610,000,000
GBP
|
| Borrowings [abstract] | ||
| Non-current portion of non-current borrowings |
544,000,000
GBP
|
638,000,000
GBP
|
| Current borrowings and current portion of non-current borrowings [abstract] | ||
| Current borrowings |
195,000,000
GBP
|
652,000,000
GBP
|
| Non-current portion of non-current borrowings, by type [abstract] | ||
| Trade and other non-current payables [abstract] | ||
| Trade and other non-current payables |
106,000,000
GBP
|
69,000,000
GBP
|
| Trade and other current payables [abstract] | ||
| Trade and other current payables |
2,565,000,000
GBP
|
3,150,000,000
GBP
|
| Miscellaneous non-current liabilities [abstract] | ||
| Non-current net defined benefit liability |
13,000,000
GBP
|
17,000,000
GBP
|
| Non-current derivative financial liabilities |
—
GBP
|
9,000,000
GBP
|
| Miscellaneous current liabilities [abstract] | ||
| Current derivative financial liabilities |
47,000,000
GBP
|
88,000,000
GBP
|
| Issued capital [abstract] | ||
| Issued capital |
40,000,000
GBP
|
42,000,000
GBP
|
| Retained earnings [abstract] | ||
| Retained earnings |
1,020,000,000
GBP
|
940,000,000
GBP
|
| Miscellaneous equity [abstract] | ||
| Capital redemption reserve |
145,000,000
GBP
|
143,000,000
GBP
|
| Merger reserve |
312,000,000
GBP
|
312,000,000
GBP
|
| Net assets (liabilities) [abstract] | ||
| Assets |
5,638,000,000
GBP
|
7,139,000,000
GBP
|
| Liabilities |
4,164,000,000
GBP
|
5,519,000,000
GBP
|
| Assets (liabilities) |
1,474,000,000
GBP
|
1,620,000,000
GBP
|
| Net current assets (liabilities) [abstract] | ||
| Current assets |
3,436,000,000
GBP
|
4,350,000,000
GBP
|
| Current liabilities |
2,993,000,000
GBP
|
4,121,000,000
GBP
|
| Assets less current liabilities [abstract] |