Analysis Of Income And Expense [Abstract]
| Concept |
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 |
2021-10-01 to 2022-09-30 |
2021-10-01 to 2022-09-30 |
2021-10-01 to 2022-09-30 |
2021-10-01 to 2022-09-30 |
2021-10-01 to 2022-09-30 |
2021-10-01 to 2022-09-30 |
2021-10-01 to 2022-09-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||
| Revenue [abstract] | ||||||||||||||
| Revenue | — | — |
2,184,000,000
GBP
|
— | — |
2,184,000,000
GBP
|
–
GBP
|
1,947,000,000
GBP
|
— | — | — | — |
2,000,000
GBP
|
1,949,000,000
GBP
|
| Material income and expense [abstract] | ||||||||||||||
| Selling, general and administrative expense [abstract] | ||||||||||||||
| Selling, general and administrative expense | — | — |
1,713,000,000
GBP
|
— | — |
1,572,000,000
GBP
|
141,000,000
GBP
|
1,442,000,000
GBP
|
— | — | — | — |
8,000,000
GBP
|
1,434,000,000
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||
| Comprehensive income |
–
GBP
|
–
GBP
|
133,000,000
GBP
|
211,000,000
GBP
|
78,000,000
GBP
|
— | — |
457,000,000
GBP
|
293,000,000
GBP
|
–
GBP
|
164,000,000
GBP
|
–
GBP
|
— | — |
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — |
133,000,000
GBP
|
— | — | — | — |
457,000,000
GBP
|
— | — | — | — | — | — |