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 |
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 |
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 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
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 |
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 |
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 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 |
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 |
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 |
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 |
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 |
2,228,000,000
GBP
|
— | — |
318,000,000
GBP
|
496,000,000
GBP
|
5,265,000,000
GBP
|
— | — | — |
200,000,000
GBP
|
901,000,000
GBP
|
— | — | — |
9,600,000,000
GBP
|
— | — |
279,000,000
GBP
|
87,000,000
GBP
|
9,282,000,000
GBP
|
— | — | — |
496,000,000
GBP
|
— | — |
10,342,000,000
GBP
|
— |
10,214,000,000
GBP
|
— |
200,000,000
GBP
|
924,000,000
GBP
|
310,000,000
GBP
|
2,328,000,000
GBP
|
85,000,000
GBP
|
9,904,000,000
GBP
|
— | — | — |
355,000,000
GBP
|
248,000,000
GBP
|
—
GBP
|
2,523,000,000
GBP
|
—
GBP
|
2,523,000,000
GBP
|
—
GBP
|
2,523,000,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
941,000,000
GBP
|
200,000,000
GBP
|
10,308,000,000
GBP
|
—
GBP
|
941,000,000
GBP
|
10,308,000,000
GBP
|
200,000,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
248,000,000
GBP
|
241,000,000
GBP
|
51,000,000
GBP
|
51,000,000
GBP
|
19,454,000,000
GBP
|
19,202,000,000
GBP
|
252,000,000
GBP
|
16,438,000,000
GBP
|
252,000,000
GBP
|
—
GBP
|
4,792,000,000
GBP
|
16,690,000,000
GBP
|
241,000,000
GBP
|
—
GBP
|
241,000,000
GBP
|
7,556,000,000
GBP
|
—
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — |
21,000,000
GBP
|
1,085,000,000
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
1,106,000,000
GBP
|
— | — |
—
GBP
|
—
GBP
|
—
GBP
|
— |
1,085,000,000
GBP
|
—
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
—
GBP
|
— |
—
GBP
|
—
GBP
|
— |
—
GBP
|
— |
1,030,000,000
GBP
|
— | — | — | — | — | — |
1,051,000,000
GBP
|
1,051,000,000
GBP
|
21,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — |
3,000,000
GBP
|
373,000,000
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
461,000,000
GBP
|
— | — |
—
GBP
|
—
GBP
|
—
GBP
|
— |
458,000,000
GBP
|
85,000,000
GBP
|
— | — | — |
—
GBP
|
95,000,000
GBP
|
—
GBP
|
— |
—
GBP
|
—
GBP
|
— |
—
GBP
|
— |
1,043,000,000
GBP
|
— | — | — | — | — | — |
1,035,000,000
GBP
|
1,130,000,000
GBP
|
8,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — |
18,000,000
GBP
|
712,000,000
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
645,000,000
GBP
|
— | — |
—
GBP
|
—
GBP
|
—
GBP
|
— |
627,000,000
GBP
|
85,000,000
GBP
|
— | — | — |
—
GBP
|
95,000,000
GBP
|
—
GBP
|
— |
—
GBP
|
—
GBP
|
— |
—
GBP
|
— |
2,073,000,000
GBP
|
— | — | — | — | — | — |
2,086,000,000
GBP
|
2,181,000,000
GBP
|
13,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — |
—
GBP
|
929,000,000
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
929,000,000
GBP
|
— | — |
—
GBP
|
—
GBP
|
—
GBP
|
— |
929,000,000
GBP
|
—
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
—
GBP
|
— |
—
GBP
|
—
GBP
|
— |
—
GBP
|
— |
862,000,000
GBP
|
— | — | — | — | — | — |
862,000,000
GBP
|
862,000,000
GBP
|
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — |
2,000,000
GBP
|
—
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
2,000,000
GBP
|
— | — |
—
GBP
|
—
GBP
|
—
GBP
|
— |
—
GBP
|
—
GBP
|
— | — | — |
—
GBP
|
—
GBP
|
—
GBP
|
— |
—
GBP
|
—
GBP
|
— |
—
GBP
|
— |
66,000,000
GBP
|
— | — | — | — | — | — |
—
GBP
|
—
GBP
|
66,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
—
GBP
|
35,000,000
GBP
|
— | — | — |
—
GBP
|
7,000,000
GBP
|
81,000,000
GBP
|
— | — |
—
GBP
|
1,000,000
GBP
|
2,000,000
GBP
|
— |
81,000,000
GBP
|
52,000,000
GBP
|
— | — | — |
34,000,000
GBP
|
46,000,000
GBP
|
2,000,000
GBP
|
— |
—
GBP
|
15,000,000
GBP
|
— |
—
GBP
|
— |
54,000,000
GBP
|
— | — | — | — | — | — |
54,000,000
GBP
|
9,000,000
GBP
|
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |