Statement Of Changes In Equity [Abstract]
| Concept |
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 |
2023-01-01 to 2023-12-31 |
As at 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 |
2023-01-01 to 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 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 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 |
As at 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 |
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 |
As at 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
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 |
2021-01-01 to 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 |
As at 2021-12-31 |
2021-01-01 to 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 |
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 |
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 |
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 |
3,518,000,000
GBP
|
— | — | — |
1,000,000
GBP
|
— |
14,000,000
GBP
|
— |
25,000,000
GBP
|
754,000,000
GBP
|
2,998,000,000
GBP
|
— |
6,000,000
GBP
|
— | — |
–
GBP
|
— |
4,088,000,000
GBP
|
— | — |
5,000,000
GBP
|
1,723,000,000
GBP
|
532,000,000
GBP
|
— | — | — |
3,000,000
GBP
|
— |
4,098,000,000
GBP
|
— |
1,000,000
GBP
|
9,000,000
GBP
|
1,723,000,000
GBP
|
3,302,000,000
GBP
|
25,000,000
GBP
|
511,000,000
GBP
|
2,998,000,000
GBP
|
— |
–
GBP
|
— | — |
–
GBP
|
4,097,000,000
GBP
|
763,000,000
GBP
|
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
1,000,000
GBP
|
763,000,000
GBP
|
1,000,000
GBP
|
9,000,000
GBP
|
1,000,000
GBP
|
— |
4,000,000
GBP
|
25,000,000
GBP
|
— |
3,301,000,000
GBP
|
— | — |
1,927,000,000
GBP
|
— |
–
GBP
|
1,723,000,000
GBP
|
— | — | — | — |
–
GBP
|
7,000,000
GBP
|
— | — |
1,000,000
GBP
|
211,000,000
GBP
|
19,000,000
GBP
|
— | — |
3,166,000,000
GBP
|
— |
1,264,000,000
GBP
|
2,000,000
GBP
|
9,000,000
GBP
|
— |
10,000,000
GBP
|
4,000,000
GBP
|
1,000,000
GBP
|
208,000,000
GBP
|
1,926,000,000
GBP
|
7,000,000
GBP
|
1,131,000,000
GBP
|
3,031,000,000
GBP
|
1,000,000
GBP
|
18,000,000
GBP
|
–
GBP
|
1,723,000,000
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — |
–
GBP
|
381,000,000
GBP
|
–
GBP
|
— | — | — |
–
GBP
|
— | — | — | — | — | — |
381,000,000
GBP
|
— | — | — |
–
GBP
|
— | — | — | — | — |
–
GBP
|
–
GBP
|
— |
–
GBP
|
— |
232,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
232,000,000
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — |
–
GBP
|
— | — | — |
263,000,000
GBP
|
— | — | — | — |
263,000,000
GBP
|
–
GBP
|
— | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
225,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
295,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
12,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — |
–
GBP
|
387,000,000
GBP
|
–
GBP
|
— |
243,000,000
GBP
|
— |
–
GBP
|
— | — | — |
–
GBP
|
— |
3,000,000
GBP
|
156,000,000
GBP
|
— |
–
GBP
|
— |
231,000,000
GBP
|
–
GBP
|
— | — | — |
9,000,000
GBP
|
–
GBP
|
308,000,000
GBP
|
— |
–
GBP
|
— |
63,000,000
GBP
|
— | — | — | — | — | — | — |
300,000,000
GBP
|
— |
245,000,000
GBP
|
–
GBP
|
— | — | — | — |
6,000,000
GBP
|
–
GBP
|
— | — | — | — | — | — | — |
2,000,000
GBP
|
— | — |
–
GBP
|
— |
–
GBP
|
10,000,000
GBP
|
— |
1,000,000
GBP
|
— | — |
13,000,000
GBP
|
1,000,000
GBP
|
–
GBP
|
–
GBP
|
— | — |
275,000,000
GBP
|
3,000,000
GBP
|
— | — | — |
276,000,000
GBP
|
–
GBP
|
— |
–
GBP
|
— | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Issue of equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
6,000,000
GBP
|
–
GBP
|
— |
–
GBP
|
— |
6,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — |
–
GBP
|
— | — | — |
–
GBP
|
— | — | — | — |
1,000,000
GBP
|
–
GBP
|
— | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — |
–
GBP
|
— | — | — |
10,000,000
GBP
|
— | — | — | — |
8,000,000
GBP
|
2,000,000
GBP
|
— | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
–
GBP
|
27,000,000
GBP
|
–
GBP
|
— | — | — |
–
GBP
|
— | — | — | — | — | — |
27,000,000
GBP
|
— | — | — |
–
GBP
|
— | — | — | — | — |
–
GBP
|
–
GBP
|
— |
–
GBP
|
— |
18,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
18,000,000
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — |
–
GBP
|
— | — | — |
10,000,000
GBP
|
— | — | — | — |
10,000,000
GBP
|
–
GBP
|
— | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |