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 |
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 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||
| Dividends recognised as distributions to owners of parent |
—
GBP
|
—
GBP
|
468,000,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
468,000,000
GBP
|
468,000,000
GBP
|
—
GBP
|
—
GBP
|
462,000,000
GBP
|
—
GBP
|
—
GBP
|
462,000,000
GBP
|
—
GBP
|
462,000,000
GBP
|
—
GBP
|
| Dividends recognised as distributions to non-controlling interests |
13,000,000
GBP
|
—
GBP
|
13,000,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
13,000,000
GBP
|
—
GBP
|
13,000,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
| Increase (decrease) through exercise of options, equity |
—
GBP
|
—
GBP
|
4,000,000
GBP
|
4,000,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
4,000,000
GBP
|
—
GBP
|
—
GBP
|
9,000,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
9,000,000
GBP
|
9,000,000
GBP
|
—
GBP
|