Statement Of Changes In Equity [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
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 |
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 |
As at 2023-12-31 |
As at 2023-12-31 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||
| Equity | — | — | — | — |
3, 836
GBP
|
1, 2 53
GBP
|
— | — |
80,000,000
GBP
|
161,000,000
GBP
|
— | — |
11 , 6 1 6
GBP
|
— |
6 , 4 47
GBP
|
1 1 ,777
GBP
|
— |
10,723,000,000
GBP
|
— | — |
2, 822
GBP
|
— |
6 , 4 03
GBP
|
— | — | — | — |
16 4
GBP
|
1, 2 5 3
GBP
|
— |
81,000,000
GBP
|
10, 559
GBP
|
11, 4 0 0
GBP
|
6 , 9 51
GBP
|
18 5
GBP
|
1, 2 5 2
GBP
|
2, 93 0
GBP
|
82,000,000
GBP
|
11 , 2 1 5
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
–
GBP
|
1, 9 56
GBP
|
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
2 , 0 41
GBP
|
— | — |
1, 9 5 6
GBP
|
85,000,000
GBP
|
— |
2 , 0 41
GBP
|
— | — |
1, 9 4 0
GBP
|
— |
1, 8 5 7
GBP
|
–
GBP
|
— |
83,000,000
GBP
|
— |
1, 8 5 7
GBP
|
–
GBP
|
–
GBP
|
1, 9 4 0
GBP
|
— | — |
–
GBP
|
— | — | — | — | — | — | — | — | — |
| Other comprehensive income |
38,000,000
GBP
|
439,000,000
GBP
|
–
GBP
|
–
GBP
|
— | — |
37,000,000
GBP
|
404,000,000
GBP
|
— | — |
4 01
GBP
|
2,000,000
GBP
|
— |
4 41
GBP
|
— | — |
1, 2 0 9
GBP
|
— |
1 ,19 3
GBP
|
511,000,000
GBP
|
— |
16,000,000
GBP
|
— |
6 82
GBP
|
–
GBP
|
519,000,000
GBP
|
69 0
GBP
|
— | — |
–
GBP
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income |
38,000,000
GBP
|
2 , 395
GBP
|
–
GBP
|
–
GBP
|
— | — |
37,000,000
GBP
|
2 ,4 45
GBP
|
— | — |
2 ,3 57
GBP
|
87,000,000
GBP
|
— |
2, 482
GBP
|
— | — |
7 31
GBP
|
— |
664,000,000
GBP
|
5 11
GBP
|
— |
67,000,000
GBP
|
— |
1,1 7 5
GBP
|
–
GBP
|
51 9
GBP
|
1, 25 0
GBP
|
— | — |
–
GBP
|
— | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
–
GBP
|
937,000,000
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — |
937,000,000
GBP
|
9 0
GBP
|
— |
1, 0 2 7
GBP
|
— | — |
9 45
GBP
|
— |
857,000,000
GBP
|
–
GBP
|
— |
8 8
GBP
|
— |
857,000,000
GBP
|
–
GBP
|
— | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity |
1,000,000
GBP
|
5 5 1
GBP
|
1,000,000
GBP
|
–
GBP
|
— | — | — | — | — | — |
5 5 1
GBP
|
–
GBP
|
— |
5 5 1
GBP
|
— | — |
55 8
GBP
|
— |
55 8
GBP
|
1,000,000
GBP
|
— |
–
GBP
|
— |
55 8
GBP
|
–
GBP
|
— | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
–
GBP
|
14 5
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — |
14 5
GBP
|
–
GBP
|
— |
14 5
GBP
|
— | — |
13 2
GBP
|
— |
13 2
GBP
|
–
GBP
|
— |
–
GBP
|
— |
13 2
GBP
|
–
GBP
|
— | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — |