Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
As at 2023-01-01 |
As at 2023-01-01 |
As at 2023-01-01 |
As at 2023-01-01 |
As at 2023-01-01 |
As at 2023-01-01 |
As at 2023-01-01 |
As at 2023-01-01 |
As at 2023-01-01 |
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 |
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 |
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 |
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 |
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 |
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 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity |
5,000,000
GBP
|
207,000,000
GBP
|
141,000,000
GBP
|
— | — | — |
5,090,000,000
GBP
|
— | — | — |
4 ,449
GBP
|
327,000,000
GBP
|
— | — |
640,000,000
GBP
|
— |
257,000,000
GBP
|
4,878,000,000
GBP
|
7,000,000
GBP
|
149,000,000
GBP
|
207,000,000
GBP
|
5,037,000,000
GBP
|
129,000,000
GBP
|
5,679,000,000
GBP
|
280,000,000
GBP
|
640,000,000
GBP
|
5,893,000,000
GBP
|
— |
–
GBP
|
— | — | — | — | — |
–
GBP
|
7,000,000
GBP
|
149,000,000
GBP
|
207,000,000
GBP
|
7,000,000
GBP
|
280,000,000
GBP
|
640,000,000
GBP
|
207,000,000
GBP
|
51,000,000
GBP
|
51,000,000
GBP
|
51,000,000
GBP
|
5,628,000,000
GBP
|
–
GBP
|
–
GBP
|
129,000,000
GBP
|
129,000,000
GBP
|
–
GBP
|
–
GBP
|
149,000,000
GBP
|
640,000,000
GBP
|
4,986,000,000
GBP
|
4,986,000,000
GBP
|
280,000,000
GBP
|
5,842,000,000
GBP
|
5,628,000,000
GBP
|
5,842,000,000
GBP
|
— | — | — |
305,000,000
GBP
|
171,000,000
GBP
|
207,000,000
GBP
|
6,000,000
GBP
|
1,094,000,000
GBP
|
7,847,000,000
GBP
|
5,766,000,000
GBP
|
7,634,000,000
GBP
|
640,000,000
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — |
12,000,000
GBP
|
–
GBP
|
11,000,000
GBP
|
— |
–
GBP
|
1,000,000
GBP
|
–
GBP
|
— | — |
1,000,000
GBP
|
–
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
546,000,000
GBP
|
— |
–
GBP
|
1,000,000
GBP
|
558,000,000
GBP
|
11,000,000
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
558,000,000
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — |
215,000,000
GBP
|
–
GBP
|
–
GBP
|
— |
–
GBP
|
215,000,000
GBP
|
45,000,000
GBP
|
— | — |
170,000,000
GBP
|
–
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
809,000,000
GBP
|
— |
41,000,000
GBP
|
–
GBP
|
850,000,000
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
809,000,000
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — | — |
203,000,000
GBP
|
–
GBP
|
11,000,000
GBP
|
— |
–
GBP
|
214,000,000
GBP
|
45,000,000
GBP
|
— | — |
169,000,000
GBP
|
–
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1,355,000,000
GBP
|
— |
41,000,000
GBP
|
1,000,000
GBP
|
1,408,000,000
GBP
|
11,000,000
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,367,000,000
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — |
| Issue of equity | — | — | — |
–
GBP
|
–
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — |
279,000,000
GBP
|
–
GBP
|
–
GBP
|
— |
–
GBP
|
279,000,000
GBP
|
–
GBP
|
— | — |
279,000,000
GBP
|
–
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
307,000,000
GBP
|
— |
–
GBP
|
–
GBP
|
307,000,000
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
307,000,000
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
6,000,000
GBP
|
— |
17,000,000
GBP
|
–
GBP
|
23,000,000
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
6,000,000
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — |