Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||
| Equity |
8 0 4 .1
GBP
|
— | — | — | — | — |
—
GBP
|
18 3 . 2
GBP
|
60 4 .5
GBP
|
66 .0
GBP
|
9,300,000
GBP
|
6. 4
GBP
|
1,2 8 8 . 5
GBP
|
— | — | — |
—
GBP
|
1, 4 0 8 .7
GBP
|
— | — |
1, 07 3 .7
GBP
|
— | — | — |
1 ,288. 5
GBP
|
— |
11. 6
GBP
|
9,300,000
GBP
|
1 ,01 3.0
GBP
|
18 3 . 2
GBP
|
— | — |
1 ,13 5 . 7
GBP
|
7,100,000
GBP
|
—
GBP
|
1,15 3 . 5
GBP
|
3 .1
GBP
|
—
GBP
|
15 3 . 3
GBP
|
17 5 .1
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — |
—
GBP
|
—
GBP
|
2 9 4 .1
GBP
|
2 9 4 .1
GBP
|
—
GBP
|
— | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
—
GBP
|
— | — |
—
GBP
|
—
GBP
|
— |
—
GBP
|
—
GBP
|
—
GBP
|
— |
—
GBP
|
— | — | — | — |
33 0.5
GBP
|
3 30 .5
GBP
|
— | — | — | — | — | — | — | — |
| Other comprehensive income | — |
—
GBP
|
—
GBP
|
5. 2
GBP
|
—
GBP
|
—
GBP
|
— | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
5,200,000
GBP
|
— | — |
—
GBP
|
—
GBP
|
— |
—
GBP
|
—
GBP
|
8,500,000
GBP
|
— |
—
GBP
|
— | — | — | — |
8 .5
GBP
|
—
GBP
|
— | — | — | — | — | — | — | — |
| Comprehensive income | — |
—
GBP
|
—
GBP
|
288 .9
GBP
|
2 9 4 .1
GBP
|
—
GBP
|
— | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
5,200,000
GBP
|
— | — |
—
GBP
|
—
GBP
|
— |
—
GBP
|
—
GBP
|
8 .5
GBP
|
— |
—
GBP
|
— | — | — | — |
339,000,000
GBP
|
3 30 .5
GBP
|
— | — | — | — | — | — | — | — |
| Issue of equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
13 5 . 0
GBP
|
—
GBP
|
— |
1 ,01 3.0
GBP
|
—
GBP
|
—
GBP
|
— |
2,200,000
GBP
|
— | — | — | — |
1 ,15 0 . 2
GBP
|
—
GBP
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — |
—
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
|
—
GBP
|
85,300,000
GBP
|
85,300,000
GBP
|
—
GBP
|
— | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
—
GBP
|
— | — |
—
GBP
|
—
GBP
|
— |
—
GBP
|
35,600,000
GBP
|
—
GBP
|
— |
—
GBP
|
— | — | — | — |
9 3 .1
GBP
|
5 7. 5
GBP
|
— | — | — | — | — | — | — | — |