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 |
As at 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
2023-01-01 to 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 |
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 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
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 |
As at 2022-12-31 |
As at 2022-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||
| Equity | — | — | — | — |
145,000,000
GBP
|
1,020,000,000
GBP
|
— |
147,000,000
GBP
|
40,000,000
GBP
|
95,000,000
GBP
|
— | — |
1,379,000,000
GBP
|
— |
285,000,000
GBP
|
— |
312,000,000
GBP
|
1,474,000,000
GBP
|
— |
1,620,000,000
GBP
|
— | — | — |
940,000,000
GBP
|
— |
143,000,000
GBP
|
63,000,000
GBP
|
— | — |
99,000,000
GBP
|
147,000,000
GBP
|
— |
42,000,000
GBP
|
— |
312,000,000
GBP
|
1,521,000,000
GBP
|
1,567,000,000
GBP
|
69,000,000
GBP
|
34,000,000
GBP
|
147,000,000
GBP
|
143,000,000
GBP
|
820,000,000
GBP
|
38,000,000
GBP
|
1,533,000,000
GBP
|
316,000,000
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — |
421,000,000
GBP
|
— | — | — | — | — | — | — | — |
421,000,000
GBP
|
14,000,000
GBP
|
— |
435,000,000
GBP
|
— | — | — | — |
283,000,000
GBP
|
— |
270,000,000
GBP
|
— | — | — |
13,000,000
GBP
|
— | — |
270,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
241,000,000
GBP
|
288,000,000
GBP
|
— | — | — | — | — | — | — | — |
47,000,000
GBP
|
1,000,000
GBP
|
— |
289,000,000
GBP
|
— | — | — | — |
153,000,000
GBP
|
— |
150,000,000
GBP
|
130,000,000
GBP
|
— | — |
3,000,000
GBP
|
— | — |
20,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
241,000,000
GBP
|
133,000,000
GBP
|
—
GBP
|
—
GBP
|
— | — |
—
GBP
|
— | — | — |
374,000,000
GBP
|
13,000,000
GBP
|
— |
146,000,000
GBP
|
— |
—
GBP
|
— | — |
130,000,000
GBP
|
— |
120,000,000
GBP
|
130,000,000
GBP
|
—
GBP
|
— |
10,000,000
GBP
|
— | — |
250,000,000
GBP
|
—
GBP
|
— | — |
—
GBP
|
— |
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Issue of equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
4,000,000
GBP
|
— |
4,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,000,000
GBP
|
— |
1,000,000
GBP
|
— | — | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
—
GBP
|
— |
3,000,000
GBP
|
— | — | — |
3,000,000
GBP
|
— | — |
3,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
18,000,000
GBP
|
— | — | — | — | — | — | — | — |
18,000,000
GBP
|
— | — |
18,000,000
GBP
|
— | — | — | — |
15,000,000
GBP
|
— |
15,000,000
GBP
|
— | — | — | — | — | — |
15,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |