Statement Of Changes In Equity [Abstract]
| Concept |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
2024-04-05 to 2025-03-31 |
2024-04-05 to 2025-03-31 |
As at 2025-03-31 |
2024-04-05 to 2025-03-31 |
As at 2025-03-31 |
2024-04-05 to 2025-03-31 |
As at 2025-03-31 |
2024-04-05 to 2025-03-31 |
2024-04-05 to 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
2024-04-05 to 2025-03-31 |
2024-04-05 to 2025-03-31 |
2024-04-05 to 2025-03-31 |
2024-04-05 to 2025-03-31 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
As at 2024-04-04 |
As at 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
As at 2024-04-04 |
As at 2024-04-04 |
As at 2024-04-04 |
2023-04-05 to 2024-04-04 |
As at 2024-04-04 |
As at 2024-04-04 |
As at 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
As at 2024-04-04 |
As at 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
As at 2023-04-04 |
As at 2023-04-04 |
As at 2023-04-04 |
As at 2023-04-04 |
As at 2023-04-04 |
As at 2023-04-04 |
As at 2023-04-04 |
As at 2023-04-04 |
As at 2023-04-04 |
As at 2023-04-04 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity |
1,485,000,000
GBP
|
20,482,000,000
GBP
|
759,000,000
GBP
|
19,723,000,000
GBP
|
132,000,000
GBP
|
— | — |
17,086,000,000
GBP
|
— |
35,000,000
GBP
|
— |
1,157,000,000
GBP
|
— | — |
53,000,000
GBP
|
119,000,000
GBP
|
— | — | — | — | — | — |
15,119,000,000
GBP
|
36,000,000
GBP
|
— | — |
1,336,000,000
GBP
|
51,000,000
GBP
|
38,000,000
GBP
|
— |
127,000,000
GBP
|
17,686,000,000
GBP
|
1,157,000,000
GBP
|
— | — |
17,686,000,000
GBP
|
-
GBP
|
— | — | — |
38,000,000
GBP
|
176,000,000
GBP
|
-
GBP
|
16,906,000,000
GBP
|
16,906,000,000
GBP
|
1,233,000,000
GBP
|
1,336,000,000
GBP
|
47,000,000
GBP
|
14,000,000
GBP
|
14,184,000,000
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — |
-
GBP
|
2,304,000,000
GBP
|
— |
-
GBP
|
— |
-
GBP
|
— |
-
GBP
|
2,338,000,000
GBP
|
— | — |
-
GBP
|
-
GBP
|
2,304,000,000
GBP
|
34,000,000
GBP
|
-
GBP
|
-
GBP
|
— | — |
1,300,000,000
GBP
|
-
GBP
|
— | — | — |
1,300,000,000
GBP
|
— | — | — |
-
GBP
|
-
GBP
|
— | — |
-
GBP
|
-
GBP
|
1,300,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — |
222,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
269,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — | — | — | — |
-
GBP
|
2,160,000,000
GBP
|
— |
1,000,000
GBP
|
— |
-
GBP
|
— |
2,000,000
GBP
|
2,116,000,000
GBP
|
— | — |
82,000,000
GBP
|
5,000,000
GBP
|
2,082,000,000
GBP
|
34,000,000
GBP
|
2,000,000
GBP
|
49,000,000
GBP
|
— | — |
1,031,000,000
GBP
|
-
GBP
|
— | — | — |
1,031,000,000
GBP
|
— | — | — |
-
GBP
|
-
GBP
|
— | — |
4,000,000
GBP
|
24,000,000
GBP
|
1,110,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — | — | — | — |
-
GBP
|
1,000,000
GBP
|
— |
2,000,000
GBP
|
— |
-
GBP
|
— |
-
GBP
|
-
GBP
|
— | — |
1,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |