Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
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 |
As at 2023-12-31 |
As at 2023-12-31 |
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 |
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 |
2022-01-01 to 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 |
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 |
2022-11-01 to 2022-11-30 |
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 |
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 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 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity |
616,000,000
GBP
|
— |
24,724,000,000
GBP
|
— | — |
146,000,000
GBP
|
— |
2,178,000,000
GBP
|
— |
330,000,000
GBP
|
868,000,000
GBP
|
3,930,000,000
GBP
|
— | — | — |
24,505,000,000
GBP
|
— | — | — |
1,801,000,000
GBP
|
24,359,000,000
GBP
|
7,692,000,000
GBP
|
894,000,000
GBP
|
— | — |
278,000,000
GBP
|
3,930,000,000
GBP
|
950,000,000
GBP
|
23,233,000,000
GBP
|
— |
131,000,000
GBP
|
24,368,000,000
GBP
|
1,613,000,000
GBP
|
23,102,000,000
GBP
|
— | — | — | — |
7,692,000,000
GBP
|
1,217,000,000
GBP
|
— | — | — | — | — | — |
7,000,000
GBP
|
578,000,000
GBP
|
570,000,000
GBP
|
570,000,000
GBP
|
7,692,000,000
GBP
|
797,000,000
GBP
|
— | — |
522,000,000
GBP
|
— |
3,722,000,000
GBP
|
1,603,000,000
GBP
|
1,081,000,000
GBP
|
— |
23,715,000,000
GBP
|
3,722,000,000
GBP
|
23,584,000,000
GBP
|
131,000,000
GBP
|
— |
948,000,000
GBP
|
—
GBP
|
23,014,000,000
GBP
|
131,000,000
GBP
|
948,000,000
GBP
|
— | — |
24,157,000,000
GBP
|
— |
23,145,000,000
GBP
|
7,000,000
GBP
|
514,000,000
GBP
|
7,692,000,000
GBP
|
797,000,000
GBP
|
24,735,000,000
GBP
|
514,000,000
GBP
|
— |
3,722,000,000
GBP
|
7,692,000,000
GBP
|
797,000,000
GBP
|
158,000,000
GBP
|
1,543,000,000
GBP
|
23,849,000,000
GBP
|
23,829,000,000
GBP
|
183,000,000
GBP
|
23,666,000,000
GBP
|
1,309,000,000
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — |
22,000,000
GBP
|
1,703,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,725,000,000
GBP
|
— |
1,703,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
553,000,000
GBP
|
— | — | — | — |
563,000,000
GBP
|
— |
563,000,000
GBP
|
10,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,046,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,041,000,000
GBP
|
5,000,000
GBP
|
— |
1,041,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — |
288,000,000
GBP
|
— |
—
GBP
|
134,000,000
GBP
|
— |
294,000,000
GBP
|
— | — | — | — | — |
422,000,000
GBP
|
661,000,000
GBP
|
367,000,000
GBP
|
— |
367,000,000
GBP
|
— | — | — | — | — | — | — |
1,881,000,000
GBP
|
— | — | — | — |
382,000,000
GBP
|
— | — | — | — |
384,000,000
GBP
|
665,000,000
GBP
|
367,000,000
GBP
|
2,000,000
GBP
|
— | — |
943,000,000
GBP
|
— | — | — |
1,408,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
165,000,000
GBP
|
— | — | — |
957,000,000
GBP
|
— | — | — | — |
595,000,000
GBP
|
— | — | — | — | — |
46,000,000
GBP
|
9,000,000
GBP
|
— |
948,000,000
GBP
|
— | — | — | — | — | — | — |
234,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — |
288,000,000
GBP
|
— | — |
1,569,000,000
GBP
|
— |
294,000,000
GBP
|
— | — | — | — | — |
422,000,000
GBP
|
661,000,000
GBP
|
2,092,000,000
GBP
|
— |
2,070,000,000
GBP
|
— | — | — | — | — | — | — |
1,881,000,000
GBP
|
— | — | — | — |
935,000,000
GBP
|
— | — | — | — |
947,000,000
GBP
|
665,000,000
GBP
|
196,000,000
GBP
|
12,000,000
GBP
|
— | — |
943,000,000
GBP
|
— | — | — |
1,408,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
165,000,000
GBP
|
— | — | — |
89,000,000
GBP
|
— | — | — | — |
595,000,000
GBP
|
— | — | — | — | — |
1,087,000,000
GBP
|
4,000,000
GBP
|
— |
93,000,000
GBP
|
— | — | — | — | — | — | — |
234,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Issue of equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
584,000,000
GBP
|
— |
584,000,000
GBP
|
— |
584,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
628,000,000
GBP
|
— | — | — | — |
628,000,000
GBP
|
— | — | — | — | — | — |
208,000,000
GBP
|
— |
420,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — |
7,000,000
GBP
|
961,000,000
GBP
|
— | — | — |
211,000,000
GBP
|
— | — | — | — | — |
968,000,000
GBP
|
— |
961,000,000
GBP
|
750,000,000
GBP
|
— | — | — | — | — |
202,000,000
GBP
|
— | — | — | — | — |
1,054,000,000
GBP
|
— | — | — | — |
1,052,000,000
GBP
|
— |
1,052,000,000
GBP
|
2,000,000
GBP
|
— | — | — | — |
850,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
194,000,000
GBP
|
nil
GBP
|
— | — | — | — | — |
195,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
194,000,000
GBP
|
1,000,000
GBP
|
— |
194,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase through other contributions by owners, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,465,000,000
GBP
|
— | — | — | — |
1,465,000,000
GBP
|
— |
1,465,000,000
GBP
|
— | — | — | — | — | — | — | — |
1,500,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — | — |
18,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
18,000,000
GBP
|
— |
18,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
5,000,000
GBP
|
— | — | — | — |
5,000,000
GBP
|
— |
5,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
10,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
10,000,000
GBP
|
— | — |
10,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |