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 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||
| Non-current assets [abstract] | |||||||||||||||||||||
| Property, plant and equipment |
3,635,000,000
GBP
|
— | — | — | — | — | — |
3,235,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
1 , 3 11
GBP
|
— | — | — | — | — | — |
1, 4 2 5
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Investment property |
57,000,000
GBP
|
— | — | — | — | — | — |
63,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Investments accounted for using equity method |
832,000,000
GBP
|
— | — | — | — | — | — |
787,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
609,000,000
GBP
|
— | — | — | — | — | — |
33 8
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Other non-current financial assets |
2 27
GBP
|
— | — | — | — | — | — |
322,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets |
20 , 291
GBP
|
— | — | — | — | — | — |
20, 828
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||||||||||
| Current inventories |
1 ,1 5 6
GBP
|
— | — | — | — | — | — |
976,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Other current financial assets |
205,000,000
GBP
|
— | — | — | — | — | — |
252,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
4, 067
GBP
|
— | — | — | — | — | — |
3 ,1 0 7
GBP
|
— | — | — | — | — | — | — | — |
2 , 9 17
GBP
|
— | — | — | — |
| Current assets |
11 , 7 7 3
GBP
|
— | — | — | — | — | — |
10 , 6 3 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets |
32, 064
GBP
|
— | — | — | — | — | — |
31, 4 6 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||
| Issued capital |
81,000,000
GBP
|
— | — | — | — | — | — |
82,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
2,8 22
GBP
|
— | — | — | — | — | — |
2,930,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium |
1, 25 3
GBP
|
— | — | — | — | — | — |
1, 25 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves |
6,403,000,000
GBP
|
— | — | — | — | — | — |
6 , 9 51
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
10,559,000,000
GBP
|
— | — | — | — | — | — |
11 , 2 1 5
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests |
16 4
GBP
|
— | — | — | — | — | — |
18 5
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
10 ,72 3
GBP
|
2 ,822
GBP
|
6,403,000,000
GBP
|
16 4
GBP
|
1, 253
GBP
|
81,000,000
GBP
|
10,559,000,000
GBP
|
11, 4 0 0
GBP
|
6 , 9 51
GBP
|
18 5
GBP
|
1, 2 5 2
GBP
|
2,93 0
GBP
|
82,000,000
GBP
|
11 , 2 1 5
GBP
|
212,000,000
GBP
|
5,8 87
GBP
|
7, 6 6 8
GBP
|
7, 4 3 6
GBP
|
232,000,000
GBP
|
1, 2 5 2
GBP
|
85,000,000
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||
| Non-current liabilities [abstract] | |||||||||||||||||||||
| Non-current provisions [abstract] | |||||||||||||||||||||
| Non-current provisions |
332,000,000
GBP
|
— | — | — | — | — | — |
33 8
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities |
10,000,000
GBP
|
— | — | — | — | — | — |
5,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Other non-current financial liabilities |
227,000,000
GBP
|
— | — | — | — | — | — |
272,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities |
10,398,000,000
GBP
|
— | — | — | — | — | — |
10 , 216
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | |||||||||||||||||||||
| Current provisions [abstract] | |||||||||||||||||||||
| Current provisions |
236,000,000
GBP
|
— | — | — | — | — | — |
249,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current payables |
5, 43 6
GBP
|
— | — | — | — | — | — |
4 ,99 0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Other current financial liabilities |
295,000,000
GBP
|
— | — | — | — | — | — |
328,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities |
10 , 9 4 3
GBP
|
— | — | — | — | — | — |
9, 8 4 6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
21, 3 41
GBP
|
— | — | — | — | — | — |
20,0 62
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |