Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
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 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 |
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 |
2022-01-01 to 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 changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||
| Equity | — | — |
508,800,000
GBP
|
— |
9 0 7. 5
GBP
|
1. 2
GBP
|
— | — | — |
—
GBP
|
— |
8 .1
GBP
|
13 . 2
GBP
|
— |
51. 5
GBP
|
1, 2 8 8 . 5
GBP
|
— |
18 3 . 2
GBP
|
8 0 4 .1
GBP
|
— | — | — | — | — |
—
GBP
|
— |
—
GBP
|
18 3 .2
GBP
|
66 . 0
GBP
|
9,300,000
GBP
|
6 .4
GBP
|
1 ,2 88.5
GBP
|
60 4.5
GBP
|
— | — | — |
—
GBP
|
1, 4 0 8 .7
GBP
|
—
GBP
|
1, 0 7 3 .7
GBP
|
11 . 6
GBP
|
1 ,288.5
GBP
|
1 ,01 3.0
GBP
|
18 3 .2
GBP
|
9,300,000
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
—
GBP
|
3 1. 8
GBP
|
— |
—
GBP
|
— | — |
31. 8
GBP
|
—
GBP
|
—
GBP
|
— |
—
GBP
|
— | — |
—
GBP
|
— | — |
—
GBP
|
— | — |
—
GBP
|
—
GBP
|
—
GBP
|
2 9 4 .1
GBP
|
2 9 4 .1
GBP
|
— |
—
GBP
|
— | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
—
GBP
|
— | — | — | — | — | — | — | — | — |
| Other comprehensive income |
—
GBP
|
6. 8
GBP
|
— |
—
GBP
|
— | — |
—
GBP
|
—
GBP
|
6. 8
GBP
|
— |
—
GBP
|
— | — |
—
GBP
|
— | — |
—
GBP
|
— | — |
—
GBP
|
—
GBP
|
—
GBP
|
5,200,000
GBP
|
—
GBP
|
— |
—
GBP
|
— | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
5. 2
GBP
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income |
—
GBP
|
38 .6
GBP
|
— |
—
GBP
|
— | — |
3 1. 8
GBP
|
—
GBP
|
6. 8
GBP
|
— |
—
GBP
|
— | — |
—
GBP
|
— | — |
—
GBP
|
— | — |
—
GBP
|
—
GBP
|
—
GBP
|
288 .9
GBP
|
2 9 4.1
GBP
|
— |
—
GBP
|
— | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
5,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
1 ,01 3.0
GBP
|
— |
—
GBP
|
— | — | — | — | — | — | — |
—
GBP
|
1 ,01 3.0
GBP
|
—
GBP
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
—
GBP
|
5 6 .1
GBP
|
— |
—
GBP
|
— | — |
5 6 .1
GBP
|
—
GBP
|
—
GBP
|
— |
—
GBP
|
— | — |
—
GBP
|
— | — |
—
GBP
|
— | — |
—
GBP
|
—
GBP
|
—
GBP
|
85,300,000
GBP
|
85,300,000
GBP
|
— |
—
GBP
|
— | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
—
GBP
|
— | — | — | — | — | — | — | — | — |