Analysis Of Income And Expense [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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||
| Revenue [abstract] | ||||||||||
| Revenue | — | — |
2,332,000,000
GBP
|
— | — | — | — |
2,184,000,000
GBP
|
— | — |
| Material income and expense [abstract] | ||||||||||
| Selling, general and administrative expense [abstract] | ||||||||||
| Selling, general and administrative expense | — | — |
1,712,000,000
GBP
|
— | — | — | — |
1,713,000,000
GBP
|
— | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||
| 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 owners of parent, continuing and discontinued operations [abstract] | ||||||||||
| Comprehensive income, attributable to owners of parent | — | — |
220,000,000
GBP
|
— | — | — | — |
133,000,000
GBP
|
— | — |