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 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
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 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
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 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||
| Dividends recognised as distributions to owners of parent |
–
GBP
|
–
GBP
|
–
GBP
|
229,000,000
GBP
|
–
GBP
|
229,000,000
GBP
|
201,000,000
GBP
|
–
GBP
|
–
GBP
|
201,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
122,000,000
GBP
|
122,000,000
GBP
|
–
GBP
|
— | — | — | — |
–
GBP
|
— |
| Increase (decrease) through exercise of options, equity |
–
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
5,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
5,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
2,000,000
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — |
2,000,000
GBP
|
— |
| Decrease (increase) through tax on share-based payment transactions, equity |
–
GBP
|
–
GBP
|
–
GBP
|
3,000,000
GBP
|
–
GBP
|
3,000,000
GBP
|
— | — | — | — | — | — |
–
GBP
|
–
GBP
|
2,000,000
GBP
|
2,000,000
GBP
|
–
GBP
|
— | — | — | — |
–
GBP
|
— |
| Share issue related cost | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
16,000,000
GBP
|
16,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
16,000,000
GBP
|
–
GBP
|
–
GBP
|