Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 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 |
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 |
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 2021-12-31 |
2021-01-01 to 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 |
2021-01-01 to 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 |
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 |
2021-01-01 to 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity | — |
10,844,000,000
GBP
|
37,188,000,000
GBP
|
2,004,000,000
GBP
|
— |
10,645,000,000
GBP
|
— | — |
31,000,000
GBP
|
— |
841,000,000
GBP
|
10,881,000,000
GBP
|
— |
37,157,000,000
GBP
|
1,899,000,000
GBP
|
49,000,000
GBP
|
— |
3,890,000,000
GBP
|
— | — |
11,700,000,000
GBP
|
36,496,000,000
GBP
|
— | — | — | — | — |
8,000,000
GBP
|
10,019,000,000
GBP
|
— |
1,478,000,000
GBP
|
10,881,000,000
GBP
|
36,488,000,000
GBP
|
102,000,000
GBP
|
3,890,000,000
GBP
|
— |
2,771,000,000
GBP
|
— |
1,393,000,000
GBP
|
12,629,000,000
GBP
|
— |
12,966,000,000
GBP
|
— | — |
3,890,000,000
GBP
|
— |
41,803,000,000
GBP
|
— |
395,000,000
GBP
|
— | — |
269,000,000
GBP
|
1,205,000,000
GBP
|
— | — |
10,881,000,000
GBP
|
41,796,000,000
GBP
|
7,000,000
GBP
|
— | — | — |
351,000,000
GBP
|
— |
24,000,000
GBP
|
12,567,000,000
GBP
|
13,240,000,000
GBP
|
229,000,000
GBP
|
36,000,000
GBP
|
4,999,000,000
GBP
|
43,860,000,000
GBP
|
10,881,000,000
GBP
|
1,608,000,000
GBP
|
43,824,000,000
GBP
|
360,000,000
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
4,632,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
3,595,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
3,312,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
54,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2,970,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,638,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
4,686,000,000
GBP
|
— | — | — |
4,690,000,000
GBP
|
— |
4,000,000
GBP
|
4,402,000,000
GBP
|
— |
637,000,000
GBP
|
— | — |
-
GBP
|
— | — | — |
53,000,000
GBP
|
— |
872,000,000
GBP
|
— | — | — |
625,000,000
GBP
|
3,093,000,000
GBP
|
6,000,000
GBP
|
2,376,000,000
GBP
|
-
GBP
|
— | — |
371,000,000
GBP
|
— | — | — | — | — |
619,000,000
GBP
|
— |
273,000,000
GBP
|
— | — |
48,000,000
GBP
|
— |
-
GBP
|
624,000,000
GBP
|
— |
1,626,000,000
GBP
|
— | — | — | — |
1,674,000,000
GBP
|
— | — |
403,000,000
GBP
|
91,000,000
GBP
|
— | — | — | — | — | — | — |
2,744,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Issue of equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,024,000,000
GBP
|
— |
50,000,000
GBP
|
— | — |
1,024,000,000
GBP
|
— | — | — | — | — | — | — |
37,000,000
GBP
|
87,000,000
GBP
|
937,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity |
359,000,000
GBP
|
— | — | — |
359,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
359,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
383,000,000
GBP
|
— | — | — |
383,000,000
GBP
|
383,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
35,000,000
GBP
|
— | — | — |
35,000,000
GBP
|
— | — |
35,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
6,000,000
GBP
|
6,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
6,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
45,000,000
GBP
|
— | — | — | — |
45,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
45,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |