Statement Of Financial Position [Abstract]
| Concept |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, plant and equipment |
499,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
495,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
452,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
449,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other non-current receivables |
45,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
90,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
43,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
43,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets |
8,430,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
8,705,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Current inventories |
207,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
200,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current receivables |
880,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
830,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current tax assets, current |
33,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
36,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
1,562,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
2,170,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets |
2,697,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
3,237,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Issued capital |
25,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
25,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
3,518,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
3,302,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium |
14,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
9,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves |
532,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
763,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
4,089,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
4,099,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
4,088,000,000
GBP
|
3,518,000,000
GBP
|
5,000,000
GBP
|
1,723,000,000
GBP
|
532,000,000
GBP
|
1,000,000
GBP
|
14,000,000
GBP
|
25,000,000
GBP
|
754,000,000
GBP
|
2,998,000,000
GBP
|
6,000,000
GBP
|
–
GBP
|
–
GBP
|
4,098,000,000
GBP
|
–
GBP
|
4,097,000,000
GBP
|
–
GBP
|
763,000,000
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
1,000,000
GBP
|
763,000,000
GBP
|
9,000,000
GBP
|
4,000,000
GBP
|
1,000,000
GBP
|
25,000,000
GBP
|
1,000,000
GBP
|
9,000,000
GBP
|
1,723,000,000
GBP
|
3,302,000,000
GBP
|
25,000,000
GBP
|
511,000,000
GBP
|
2,998,000,000
GBP
|
3,301,000,000
GBP
|
3,000,000
GBP
|
3,166,000,000
GBP
|
1,723,000,000
GBP
|
–
GBP
|
1,927,000,000
GBP
|
1,264,000,000
GBP
|
9,000,000
GBP
|
2,000,000
GBP
|
–
GBP
|
1,000,000
GBP
|
7,000,000
GBP
|
211,000,000
GBP
|
19,000,000
GBP
|
10,000,000
GBP
|
1,000,000
GBP
|
3,031,000,000
GBP
|
4,000,000
GBP
|
1,000,000
GBP
|
18,000,000
GBP
|
–
GBP
|
208,000,000
GBP
|
1,926,000,000
GBP
|
7,000,000
GBP
|
1,131,000,000
GBP
|
1,723,000,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Non-current provisions [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other non-current provisions |
357,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
381,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other non-current payables |
71,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
90,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities |
517,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
513,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities |
4,460,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
5,005,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Current provisions [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Current provisions |
94,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
133,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current payables |
1,144,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,166,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current tax liabilities, current |
48,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
60,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities |
2,579,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
2,839,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |