Analysis Of Income And Expense [Abstract]
| Concept |
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 |
2021-10-01 to 2022-09-30 |
2020-10-01 to 2021-09-30 |
2020-10-01 to 2021-09-30 |
2020-10-01 to 2021-09-30 |
2020-10-01 to 2021-09-30 |
2020-10-01 to 2021-09-30 |
2020-10-01 to 2021-09-30 |
2020-10-01 to 2021-09-30 |
2020-10-01 to 2021-09-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||
| Revenue [abstract] | ||||||||||||||||
| Revenue |
1,947,000,000
GBP
|
— | — | — | — | — |
2,000,000
GBP
|
1,949,000,000
GBP
|
— | — |
1,846,000,000
GBP
|
— | — | — |
1,84 6
GBP
|
–
GBP
|
| Material income and expense [abstract] | ||||||||||||||||
| Selling, general and administrative expense [abstract] | ||||||||||||||||
| Selling, general and administrative expense |
1,442,000,000
GBP
|
— | — | — | — | — |
8,000,000
GBP
|
1,434,000,000
GBP
|
— | — |
1,342,000,000
GBP
|
— | — | — |
1,35 7
GBP
|
15,000,000
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||
| Comprehensive income |
457,000,000
GBP
|
164,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
293,000,000
GBP
|
— | — |
–
GBP
|
81,000,000
GBP
|
206,000,000
GBP
|
–
GBP
|
–
GBP
|
287,000,000
GBP
|
— | — |
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||
| Comprehensive income, attributable to owners of parent |
457,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
206,000,000
GBP
|
— | — | — | — | — |