Statement Of Changes In Equity [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 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 |
2023-01-01 to 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 |
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 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 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 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-01-01 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity | — |
923,100,000
GBP
|
— |
1,437,700,000
GBP
|
— |
9,300,000
GBP
|
— | — |
20,800,000
GBP
|
— |
2,094,500,000
GBP
|
— |
82,400,000
GBP
|
2,500,000
GBP
|
143,900,000
GBP
|
— |
800,000
GBP
|
6,600,000
GBP
|
— | — | — | — |
723,500,000
GBP
|
— | — | — | — | — | — | — | — |
19,500,000
GBP
|
1,697,400,000
GBP
|
9,300,000
GBP
|
1,233,900,000
GBP
|
69,900,000
GBP
|
6,500,000
GBP
|
143,900,000
GBP
|
— | — |
4,300,000
GBP
|
— |
6,600,000
GBP
|
— |
611,400,000
GBP
|
6,600,000
GBP
|
711,400,000
GBP
|
9,300,000
GBP
|
611,400,000
GBP
|
6,700,000
GBP
|
143,900,000
GBP
|
18,600,000
GBP
|
2,700,000
GBP
|
11,600,000
GBP
|
1,123,400,000
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
226,800,000
GBP
|
— |
–
GBP
|
— |
1,300,000
GBP
|
— |
228,100,000
GBP
|
–
GBP
|
— |
–
GBP
|
— |
–
GBP
|
— | — | — |
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
158,800,000
GBP
|
68,000,000
GBP
|
— |
–
GBP
|
527,700,000
GBP
|
528,600,000
GBP
|
900,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — |
44,000,000
GBP
|
483,700,000
GBP
|
— |
–
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
7,600,000
GBP
|
— |
–
GBP
|
— |
–
GBP
|
— |
0 .1
GBP
|
–
GBP
|
— |
4,000,000
GBP
|
— |
–
GBP
|
— | — | — |
–
GBP
|
— | — |
–
GBP
|
3,500,000
GBP
|
— | — | — |
–
GBP
|
6,500,000
GBP
|
5,100,000
GBP
|
–
GBP
|
2,400,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — |
–
GBP
|
— |
3,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
234,400,000
GBP
|
— |
–
GBP
|
— |
1,300,000
GBP
|
— |
228,200,000
GBP
|
–
GBP
|
— |
4,000,000
GBP
|
— |
–
GBP
|
— | — | — |
–
GBP
|
— | — |
–
GBP
|
3,500,000
GBP
|
— | — | — |
–
GBP
|
521,200,000
GBP
|
523,500,000
GBP
|
900,000
GBP
|
2,400,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — |
–
GBP
|
— |
3,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Issue of equity |
394,500,000
GBP
|
— |
–
GBP
|
— |
–
GBP
|
— |
–
GBP
|
383,000,000
GBP
|
— |
–
GBP
|
— |
11,500,000
GBP
|
— | — | — |
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — | — |
58,300,000
GBP
|
632,300,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — |
574,000,000
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
5,400,000
GBP
|
— |
–
GBP
|
— |
–
GBP
|
— |
5,400,000
GBP
|
–
GBP
|
— |
–
GBP
|
— |
–
GBP
|
— | — | — |
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — | — |
–
GBP
|
1,000,000
GBP
|
1,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — |
–
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |