Statement Of Changes In Equity [Abstract]
| Concept |
2023-10-01 to 2024-09-30 |
2023-10-01 to 2024-09-30 |
2023-10-01 to 2024-09-30 |
2023-10-01 to 2024-09-30 |
2023-10-01 to 2024-09-30 |
2023-10-01 to 2024-09-30 |
2023-10-01 to 2024-09-30 |
2022-10-01 to 2023-09-30 |
2022-10-01 to 2023-09-30 |
2022-10-01 to 2023-09-30 |
2022-10-01 to 2023-09-30 |
2022-10-01 to 2023-09-30 |
2022-10-01 to 2023-09-30 |
2022-10-01 to 2023-09-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||
| Increase (decrease) through exercise of options, equity |
12,800,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
700,000
GBP
|
-
GBP
|
13,500,000
GBP
|
200,000
GBP
|
-
GBP
|
300,000
GBP
|
3,900,000
GBP
|
11,400,000
GBP
|
-
GBP
|
14,800,000
GBP
|
| Decrease (increase) through tax on share-based payment transactions, equity |
4,400,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
4,400,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
1,900,000
GBP
|
1,900,000
GBP
|
-
GBP
|
-
GBP
|
| Purchase of treasury shares |
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
89,500,000
GBP
|
-
GBP
|
89,500,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
120,500,000
GBP
|
-
GBP
|
-
GBP
|
120,500,000
GBP
|
| Cancellation of treasury shares |
110,000,000
GBP
|
18,100,000
GBP
|
-
GBP
|
18,100,000
GBP
|
-
GBP
|
-
GBP
|
110,000,000
GBP
|
12,900,000
GBP
|
12,900,000
GBP
|
-
GBP
|
-
GBP
|
67,300,000
GBP
|
-
GBP
|
67,300,000
GBP
|