Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||
| Dividends recognised as distributions to owners of parent |
–
GBP
|
–
GBP
|
12 8
GBP
|
–
GBP
|
–
GBP
|
12 8
GBP
|
–
GBP
|
12 8
GBP
|
–
GBP
|
89,000,000
GBP
|
–
GBP
|
–
GBP
|
89,000,000
GBP
|
–
GBP
|
–
GBP
|
8 9
GBP
|
–
GBP
|
–
GBP
|
| Dividends recognised as distributions to non-controlling interests |
–
GBP
|
–
GBP
|
6,000,000
GBP
|
6,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
4,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
4,000,000
GBP
|
–
GBP
|
| Increase (decrease) through acquisition of subsidiary, equity |
–
GBP
|
–
GBP
|
64,000,000
GBP
|
64,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
5,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
5,000,000
GBP
|
–
GBP
|