Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
1,780,000,000
GBP
|
1,757,000,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
26,855,000,000
GBP
|
28,436,000,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
36,000,000
GBP
|
25,000,000
GBP
|
— |
| Non-current derivative financial assets |
65,000,000
GBP
|
44,000,000
GBP
|
— |
| Other non-current assets |
114,000,000
GBP
|
132,000,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
1,856,000,000
GBP
|
1,881,000,000
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
1,408,000,000
GBP
|
1,348,000,000
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
1,044,000,000
GBP
|
684,000,000
GBP
|
414,000,000
GBP
|
| Miscellaneous current assets [abstract] | |||
| Current derivative financial assets |
23,000,000
GBP
|
50,000,000
GBP
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
8,800,000,000
GBP
|
10,003,000,000
GBP
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings and current portion of non-current borrowings |
656,000,000
GBP
|
437,000,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Current borrowings and current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
3,526,000,000
GBP
|
3,621,000,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
157,000,000
GBP
|
161,000,000
GBP
|
— |
| Non-current derivative financial liabilities |
150,000,000
GBP
|
175,000,000
GBP
|
— |
| Other non-current liabilities |
53,000,000
GBP
|
22,000,000
GBP
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Current derivative financial liabilities |
40,000,000
GBP
|
31,000,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
92,000,000
GBP
|
92,000,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
27,474,000,000
GBP
|
26,730,000,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
34,055,000,000
GBP
|
34,815,000,000
GBP
|
— |
| Liabilities |
17,326,000,000
GBP
|
18,358,000,000
GBP
|
— |
| Assets (liabilities) |
16,729,000,000
GBP
|
16,457,000,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
4,818,000,000
GBP
|
4,059,000,000
GBP
|
— |
| Current liabilities |
4,640,000,000
GBP
|
4,370,000,000
GBP
|
— |
| Assets less current liabilities [abstract] |