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 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||||||||
| Non-current assets [abstract] | |||||||||||||||||||||||||||
| Property, plant and equipment |
89 3
GBP
|
— | — | — | — | — | — | — | — |
737,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
364,000,000
GBP
|
— | — | — | — | — | — | — | — |
419,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Investments accounted for using equity method |
21,000,000
GBP
|
— | — | — | — | — | — | — | — |
22,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other non-current receivables |
49,000,000
GBP
|
— | — | — | — | — | — | — | — |
5 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
10 5
GBP
|
— | — | — | — | — | — | — | — |
80,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets |
2 , 789
GBP
|
— | — | — | — | — | — | — | — |
2 , 61 0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||||||||||||||||
| Current inventories |
2 , 718
GBP
|
— | — | — | — | — | — | — | — |
2 ,376
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current receivables |
835,000,000
GBP
|
— | — | — | — | — | — | — | — |
817,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
6 89
GBP
|
— | — | — | — | — | — | — | — |
1,064,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets |
4,350,000,000
GBP
|
— | — | — | — | — | — | — | — |
4 ,35 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets |
7, 13 9
GBP
|
— | — | — | — | — | — | — | — |
6 ,9 6 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||||||||
| Issued capital |
42,000,000
GBP
|
— | — | — | — | — | — | — | — |
38,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
940,000,000
GBP
|
— | — | — | — | — | — | — | — |
8 20
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium |
14 7
GBP
|
— | — | — | — | — | — | — | — |
147,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves |
6 3
GBP
|
— | — | — | — | — | — | — | — |
69,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
1, 5 2 1
GBP
|
— | — | — | — | — | — | — | — |
1, 5 3 3
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests |
99,000,000
GBP
|
— | — | — | — | — | — | — | — |
3 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
1, 6 2 0
GBP
|
94 0
GBP
|
14 3
GBP
|
6 3
GBP
|
99,000,000
GBP
|
14 7
GBP
|
42,000,000
GBP
|
312,000,000
GBP
|
1, 5 2 1
GBP
|
1, 5 67
GBP
|
69,000,000
GBP
|
34,000,000
GBP
|
14 7
GBP
|
14 3
GBP
|
82 0
GBP
|
38,000,000
GBP
|
316,000,000
GBP
|
1, 5 3 3
GBP
|
1, 0 0 9
GBP
|
14 2
GBP
|
228,000,000
GBP
|
1 ,1 31
GBP
|
–
GBP
|
1 ,1 0 9
GBP
|
22,000,000
GBP
|
14 7
GBP
|
39,000,000
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||||||||
| Non-current liabilities [abstract] | |||||||||||||||||||||||||||
| Non-current provisions [abstract] | |||||||||||||||||||||||||||
| Non-current provisions |
39,000,000
GBP
|
— | — | — | — | — | — | — | — |
4 7
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other non-current payables |
69,000,000
GBP
|
— | — | — | — | — | — | — | — |
6 0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities |
2 67
GBP
|
— | — | — | — | — | — | — | — |
255,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities |
1, 3 9 8
GBP
|
— | — | — | — | — | — | — | — |
1 ,686
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | |||||||||||||||||||||||||||
| Current provisions [abstract] | |||||||||||||||||||||||||||
| Current provisions |
6 9
GBP
|
— | — | — | — | — | — | — | — |
57,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current payables |
3 ,15 0
GBP
|
— | — | — | — | — | — | — | — |
2,898,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities |
4 ,1 2 1
GBP
|
— | — | — | — | — | — | — | — |
3 , 7 11
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
5 , 519
GBP
|
— | — | — | — | — | — | — | — |
5 ,397
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |