Statement Of Changes In Equity [Abstract]
| Concept |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
2022-04-25 to 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
2022-04-25 to 2023-04-30 |
As at 2023-04-30 |
2022-04-25 to 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
As at 2023-04-30 |
2022-04-25 to 2023-04-30 |
2022-04-25 to 2023-04-30 |
2022-04-25 to 2023-04-30 |
2022-04-25 to 2023-04-30 |
2022-04-25 to 2023-04-30 |
2022-04-25 to 2023-04-30 |
2022-04-25 to 2023-04-30 |
2022-04-25 to 2023-04-30 |
2022-04-25 to 2023-04-30 |
2022-04-25 to 2023-04-30 |
2021-04-26 to 2022-04-24 |
As at 2022-04-24 |
As at 2022-04-24 |
2021-04-26 to 2022-04-24 |
As at 2022-04-24 |
As at 2022-04-24 |
2021-04-26 to 2022-04-24 |
2021-04-26 to 2022-04-24 |
2021-04-26 to 2022-04-24 |
2021-04-26 to 2022-04-24 |
As at 2022-04-24 |
2021-04-26 to 2022-04-24 |
As at 2022-04-24 |
As at 2022-04-24 |
As at 2022-04-24 |
2021-04-26 to 2022-04-24 |
2021-04-26 to 2022-04-24 |
As at 2022-04-24 |
As at 2022-04-24 |
2021-04-26 to 2022-04-24 |
2021-04-26 to 2022-04-24 |
2021-04-26 to 2022-04-24 |
2021-04-26 to 2022-04-24 |
As at 2022-04-24 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
As at 2021-04-25 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity |
874,300,000
GBP
|
1,658,200,000
GBP
|
1,618,200,000
GBP
|
40,000,000
GBP
|
— |
2,275,500,000
GBP
|
47,400,000
GBP
|
64,100,000
GBP
|
— |
33,100,000
GBP
|
— |
644,200,000
GBP
|
66,800,000
GBP
|
965,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1,308,600,000
GBP
|
66,800,000
GBP
|
— |
35,600,000
GBP
|
874,300,000
GBP
|
— | — | — | — |
923,900,000
GBP
|
— |
488,900,000
GBP
|
14,100,000
GBP
|
1,778,100,000
GBP
|
— | — |
64,100,000
GBP
|
1,286,600,000
GBP
|
— | — | — | — |
22,000,000
GBP
|
874,300,000
GBP
|
18,100,000
GBP
|
66,700,000
GBP
|
64,100,000
GBP
|
28,800,000
GBP
|
967,700,000
GBP
|
1,211,000,000
GBP
|
1,300,000
GBP
|
295,700,000
GBP
|
1,554,500,000
GBP
|
1,192,900,000
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — |
488,000,000
GBP
|
— | — | — |
13,300,000
GBP
|
— |
475,000,000
GBP
|
— | — | — |
-
GBP
|
-
GBP
|
488,000,000
GBP
|
-
GBP
|
501,300,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
26,300,000
GBP
|
-
GBP
|
-
GBP
|
— | — |
25,700,000
GBP
|
— | — |
249,800,000
GBP
|
7,100,000
GBP
|
256,900,000
GBP
|
-
GBP
|
— |
231,200,000
GBP
|
— | — | — |
-
GBP
|
-
GBP
|
— | — |
-
GBP
|
-
GBP
|
-
GBP
|
249,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
20,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
22,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
481,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
279,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — | — |
-
GBP
|
— | — | — |
-
GBP
|
— | — | — | — | — |
19,000,000
GBP
|
-
GBP
|
19,000,000
GBP
|
-
GBP
|
19,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
— |
-
GBP
|
-
GBP
|
— | — | — | — | — |
12,800,000
GBP
|
-
GBP
|
12,800,000
GBP
|
-
GBP
|
— | — | — | — | — |
100,000
GBP
|
-
GBP
|
— | — |
12,800,000
GBP
|
-
GBP
|
-
GBP
|
100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |