Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-12-31 |
As at 2022-12-31 |
|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||
| Property, plant and equipment [abstract] | ||
| Property, plant and equipment |
89 3
GBP
|
737,000,000
GBP
|
| Intangible assets and goodwill [abstract] | ||
| Intangible assets and goodwill |
1, 2 71
GBP
|
1 ,17 4
GBP
|
| Investments accounted for using equity method [abstract] | ||
| Investments accounted for using equity method |
21,000,000
GBP
|
22,000,000
GBP
|
| Trade and other non-current receivables [abstract] | ||
| Trade and other non-current receivables |
49,000,000
GBP
|
5 4
GBP
|
| Miscellaneous non-current assets [abstract] | ||
| Non-current net defined benefit asset |
84,000,000
GBP
|
10 4
GBP
|
| Non-current derivative financial assets |
1,000,000
GBP
|
17,000,000
GBP
|
| Trade and other current receivables [abstract] | ||
| Trade and other current receivables |
835,000,000
GBP
|
817,000,000
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 |
1,000,000
GBP
|
3,000,000
GBP
|
| Classes of current inventories [abstract] | ||
| Current inventories |
2 , 718
GBP
|
2 ,376
GBP
|
| Classes of current inventories, alternative [abstract] | ||
| Cash and cash equivalents [abstract] | ||
| Cash [abstract] | ||
| Cash |
610,000,000
GBP
|
6 41
GBP
|
| Cash equivalents [abstract] | ||
| Short-term deposits, classified as cash equivalents |
79,000,000
GBP
|
423,000,000
GBP
|
| Cash and cash equivalents |
6 89
GBP
|
1,064,000,000
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 |
14,000,000
GBP
|
19,000,000
GBP
|
| Miscellaneous current assets [abstract] | ||
| Current derivative financial assets |
38,000,000
GBP
|
37,000,000
GBP
|
| Borrowings [abstract] | ||
| Non-current portion of non-current borrowings |
6 3 8
GBP
|
8 9 6
GBP
|
| Current borrowings and current portion of non-current borrowings [abstract] | ||
| Current borrowings |
6 5 2
GBP
|
5 4 6
GBP
|
| Non-current portion of non-current borrowings, by type [abstract] | ||
| Trade and other non-current payables [abstract] | ||
| Trade and other non-current payables |
69,000,000
GBP
|
6 0
GBP
|
| Trade and other current payables [abstract] | ||
| Trade and other current payables |
3 ,15 0
GBP
|
2,898,000,000
GBP
|
| Miscellaneous non-current liabilities [abstract] | ||
| Non-current net defined benefit liability |
17,000,000
GBP
|
11,000,000
GBP
|
| Non-current derivative financial liabilities |
9,000,000
GBP
|
1,000,000
GBP
|
| Miscellaneous current liabilities [abstract] | ||
| Current derivative financial liabilities |
8 8
GBP
|
39,000,000
GBP
|
| Issued capital [abstract] | ||
| Issued capital |
42,000,000
GBP
|
38,000,000
GBP
|
| Retained earnings [abstract] | ||
| Retained earnings |
940,000,000
GBP
|
8 20
GBP
|
| Miscellaneous equity [abstract] | ||
| Capital redemption reserve |
14 3
GBP
|
14 3
GBP
|
| Merger reserve |
312,000,000
GBP
|
31 6
GBP
|
| Net assets (liabilities) [abstract] | ||
| Assets |
7, 13 9
GBP
|
6 ,9 6 4
GBP
|
| Liabilities |
5 , 519
GBP
|
5 ,397
GBP
|
| Assets (liabilities) |
1, 6 2 0
GBP
|
1,5 67
GBP
|
| Net current assets (liabilities) [abstract] | ||
| Current assets |
4,350,000,000
GBP
|
4 ,35 4
GBP
|
| Current liabilities |
4 ,1 2 1
GBP
|
3 , 7 11
GBP
|
| Assets less current liabilities [abstract] |