Statement Of Changes In Equity [Abstract]
| Concept |
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 |
As at 2023-12-31 |
As at 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 |
2023-01-01 to 2023-12-31 |
As at 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 |
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 |
As at 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 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 |
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 2021-12-31 |
As at 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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity | — |
14,623,000,000
GBP
|
— |
4,295,000,000
GBP
|
— |
—
GBP
|
5,620,000,000
GBP
|
3,105,000,000
GBP
|
1,000,000
GBP
|
14,623,000,000
GBP
|
348,000,000
GBP
|
6,000,000
GBP
|
1,956,000,000
GBP
|
— | — |
14,407,000,000
GBP
|
— | — | — | — | — |
—
GBP
|
5,620,000,000
GBP
|
4,848,000,000
GBP
|
3,105,000,000
GBP
|
— |
1,000,000
GBP
|
14,407,000,000
GBP
|
1,956,000,000
GBP
|
5,000,000
GBP
|
— |
1,128,000,000
GBP
|
— |
5,053,000,000
GBP
|
— |
2,191,000,000
GBP
|
— |
16,102,000,000
GBP
|
107,000,000
GBP
|
25,000,000
GBP
|
— |
16,102,000,000
GBP
|
—
GBP
|
5,620,000,000
GBP
|
1,000,000
GBP
|
3,105,000,000
GBP
|
— | — | — |
4,348,000,000
GBP
|
162,000,000
GBP
|
481,000,000
GBP
|
15,774,000,000
GBP
|
3,105,000,000
GBP
|
2,191,000,000
GBP
|
1,000,000
GBP
|
5,620,000,000
GBP
|
15,936,000,000
GBP
|
28,000,000
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
1,541,000,000
GBP
|
— |
1,541,000,000
GBP
|
— |
1,541,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1,394,000,000
GBP
|
1,394,000,000
GBP
|
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1,394,000,000
GBP
|
— |
19,000,000
GBP
|
— | — | — |
1,365,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,384,000,000
GBP
|
1,365,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
327,000,000
GBP
|
— |
327,000,000
GBP
|
— |
442,000,000
GBP
|
— | — | — | — | — | — | — | — |
11,000,000
GBP
|
780,000,000
GBP
|
— |
1,690,000,000
GBP
|
435,000,000
GBP
|
— |
1,235,000,000
GBP
|
— | — | — | — | — |
20,000,000
GBP
|
— | — | — | — |
1,690,000,000
GBP
|
— | — | — |
374,000,000
GBP
|
— |
468,000,000
GBP
|
— | — | — |
3,000,000
GBP
|
— | — | — | — | — | — |
468,000,000
GBP
|
845,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
1,868,000,000
GBP
|
— |
1,868,000,000
GBP
|
— |
1,099,000,000
GBP
|
— | — | — | — | — | — | — | — |
11,000,000
GBP
|
780,000,000
GBP
|
— |
296,000,000
GBP
|
959,000,000
GBP
|
—
GBP
|
1,235,000,000
GBP
|
— | — | — | — | — |
20,000,000
GBP
|
— | — | — | — |
296,000,000
GBP
|
— |
19,000,000
GBP
|
— |
374,000,000
GBP
|
— |
1,833,000,000
GBP
|
— | — | — |
3,000,000
GBP
|
— | — | — | — | — | — |
1,852,000,000
GBP
|
2,210,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Issue of equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
750,000,000
GBP
|
— | — | — |
750,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
750,000,000
GBP
|
— | — | — | — | — |
210,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
210,000,000
GBP
|
210,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity |
1,000,000
GBP
|
— |
1,000,000
GBP
|
— |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |