Statement Of Changes In Equity [Abstract]
| Concept |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||
| Statement of changes in equity [line items] | ||||||||||||
| Increase (decrease) through transactions with owners, equity |
267,700,000
GBP
|
–
GBP
|
400,000
GBP
|
267,700,000
GBP
|
400,000
GBP
|
–
GBP
|
159,600,000
GBP
|
–
GBP
|
2,200,000
GBP
|
161,800,000
GBP
|
–
GBP
|
–
GBP
|
| Purchase of treasury shares | — | — | — | — | — | — |
7,400,000
GBP
|
–
GBP
|
–
GBP
|
7,400,000
GBP
|
–
GBP
|
–
GBP
|