Statement Of Changes In Equity [Abstract]
| Concept |
As at 2024-04-27 |
As at 2024-04-27 |
As at 2024-04-27 |
2023-04-30 to 2024-04-27 |
2023-04-30 to 2024-04-27 |
2023-04-30 to 2024-04-27 |
As at 2024-04-27 |
2023-04-30 to 2024-04-27 |
As at 2024-04-27 |
2023-04-30 to 2024-04-27 |
2022-05-01 to 2023-04-29 |
As at 2023-04-29 |
2022-05-01 to 2023-04-29 |
2022-05-01 to 2023-04-29 |
As at 2023-04-29 |
As at 2023-04-29 |
2022-05-01 to 2023-04-29 |
2022-05-01 to 2023-04-29 |
As at 2023-04-29 |
As at 2023-04-29 |
As at 2022-04-30 |
As at 2022-04-30 |
As at 2022-04-30 |
As at 2022-04-30 |
As at 2022-04-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||
| Equity |
8 4 4
GBP
|
2 , 263
GBP
|
652,000,000
GBP
|
— | — | — |
1,000,000
GBP
|
— |
2 , 072
GBP
|
— | — |
1, 89 2
GBP
|
— | — |
2 , 26 3
GBP
|
1,000,000
GBP
|
— | — |
432,000,000
GBP
|
8 0 4
GBP
|
1 ,040
GBP
|
2 , 26 3
GBP
|
1,000,000
GBP
|
2,5 01
GBP
|
8 0 3
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||
| Profit (loss) | — | — | — |
–
GBP
|
–
GBP
|
165,000,000
GBP
|
— |
16 5
GBP
|
— |
–
GBP
|
4 8 1
GBP
|
— |
4 8 1
GBP
|
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — |
| Other comprehensive income | — | — | — |
3 2
GBP
|
–
GBP
|
24,000,000
GBP
|
— |
56,000,000
GBP
|
— |
–
GBP
|
8 7
GBP
|
— |
9 6
GBP
|
9,000,000
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — |
| Comprehensive income | — | — | — |
32,000,000
GBP
|
–
GBP
|
1 89
GBP
|
— |
221,000,000
GBP
|
— |
–
GBP
|
56 8
GBP
|
— |
57 7
GBP
|
9,000,000
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — |
–
GBP
|
–
GBP
|
–
GBP
|
— |
–
GBP
|
— |
–
GBP
|
3 5
GBP
|
— |
3 5
GBP
|
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — |
10,000,000
GBP
|
–
GBP
|
8,000,000
GBP
|
— |
2,000,000
GBP
|
— |
–
GBP
|
17,000,000
GBP
|
— |
4,000,000
GBP
|
13,000,000
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — |