Statement Of Comprehensive Income [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 |
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 comprehensive income [abstract] | ||||||||||
| Profit (loss) |
323,000,000
GBP
|
–
GBP
|
323,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
211,000,000
GBP
|
211,000,000
GBP
|
–
GBP
|
| Other comprehensive income [abstract] | ||||||||||
| Other comprehensive income | — | — |
103,000,000
GBP
|
— | — | — | — |
78,000,000
GBP
|
— | — |
| Comprehensive income |
321,000,000
GBP
|
–
GBP
|
220,000,000
GBP
|
–
GBP
|
101,000,000
GBP
|
–
GBP
|
–
GBP
|
133,000,000
GBP
|
211,000,000
GBP
|
78,000,000
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||
| Comprehensive income, attributable to owners of parent | — | — |
220,000,000
GBP
|
— | — | — | — |
133,000,000
GBP
|
— | — |