Statement Of Changes In Equity [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 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 |
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| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity | — | — | — |
3,406. 4
GBP
|
4,500,000
GBP
|
— |
3,700,000
GBP
|
2 .1
GBP
|
— |
0 .9
GBP
|
1,354,500,000
GBP
|
— | — | — |
150,000,000
GBP
|
— |
16,200,000
GBP
|
— |
0 .1
GBP
|
2 , 2 23 .4
GBP
|
— | — |
2 ,14 4 . 5
GBP
|
3, 33 0.2
GBP
|
— | — | — |
3,800,000
GBP
|
1, 3 54. 7
GBP
|
— | — |
3 .9
GBP
|
2 .1
GBP
|
— |
150,000,000
GBP
|
1,000,000
GBP
|
— |
0. 2
GBP
|
1 4.2
GBP
|
— |
2, 201.0
GBP
|
1 , 3 5 5 .1
GBP
|
2 .4
GBP
|
2. 2
GBP
|
4. 3
GBP
|
1,300,000
GBP
|
13,200,000
GBP
|
3 , 3 8 9.4
GBP
|
300,000
GBP
|
150,000,000
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
–
GBP
|
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
— | — |
–
GBP
|
— | — |
308. 1
GBP
|
–
GBP
|
308,100,000
GBP
|
— |
–
GBP
|
— |
–
GBP
|
— | — |
–
GBP
|
282,600,000
GBP
|
— | — |
282. 6
GBP
|
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
— | — |
–
GBP
|
— | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — |
0 .1
GBP
|
— | — | — | — | — | — | — |
0 .9
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
–
GBP
|
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
— | — |
–
GBP
|
— | — |
308. 1
GBP
|
–
GBP
|
308,000,000
GBP
|
— |
–
GBP
|
— |
0 .1
GBP
|
— | — |
–
GBP
|
281. 7
GBP
|
— | — |
282. 6
GBP
|
–
GBP
|
800,000
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
— | — |
–
GBP
|
— | — |
100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
–
GBP
|
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
— | — |
–
GBP
|
— | — |
12 6 .4
GBP
|
–
GBP
|
1 26 .4
GBP
|
— |
–
GBP
|
— |
–
GBP
|
— | — |
–
GBP
|
1 85.0
GBP
|
— | — |
18 5.0
GBP
|
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
— | — |
–
GBP
|
— | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
–
GBP
|
–
GBP
|
700,000
GBP
|
— | — |
–
GBP
|
— | — |
–
GBP
|
— | — |
4,700,000
GBP
|
–
GBP
|
7. 1
GBP
|
— |
1,700,000
GBP
|
— |
–
GBP
|
— | — |
–
GBP
|
7. 0
GBP
|
— | — |
5,000,000
GBP
|
1 .4
GBP
|
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — |
600,000
GBP
|
— | — |
–
GBP
|
— | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — |