Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-09-30 |
As at 2022-09-30 |
As at 2021-09-30 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
104,000,000
GBP
|
152,000,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Other intangible assets |
274,000,000
GBP
|
320,000,000
GBP
|
— |
| Goodwill |
2,245,000,000
GBP
|
2,391,000,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
138,000,000
GBP
|
128,000,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current derivative financial assets |
1,000,000
GBP
|
–
GBP
|
— |
| Non-current investments other than investments accounted for using equity method |
4,000,000
GBP
|
4,000,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
376,000,000
GBP
|
355,000,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
696,000,000
GBP
|
489,000,000
GBP
|
567,000,000
GBP
|
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
1,243,000,000
GBP
|
1,044,000,000
GBP
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
14,000,000
GBP
|
178,000,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other non-current payables [abstract] | |||
| Non-current accruals and non-current deferred income including non-current contract liabilities [abstract] | |||
| Non-current deferred income including non-current contract liabilities [abstract] | |||
| Non-current deferred income other than non-current contract liabilities |
7,000,000
GBP
|
8,000,000
GBP
|
— |
| Trade and other non-current payables |
13,000,000
GBP
|
6,000,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Current accruals and current deferred income including current contract liabilities [abstract] | |||
| Current deferred income including current contract liabilities [abstract] | |||
| Current deferred income other than current contract liabilities |
745,000,000
GBP
|
734,000,000
GBP
|
— |
| Trade and other current payables |
378,000,000
GBP
|
368,000,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
19,000,000
GBP
|
19,000,000
GBP
|
— |
| Non-current derivative financial liabilities |
20,000,000
GBP
|
60,000,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
12,000,000
GBP
|
12,000,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
658,000,000
GBP
|
570,000,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
3,936,000,000
GBP
|
3,897,000,000
GBP
|
— |
| Liabilities |
2,529,000,000
GBP
|
2,500,000,000
GBP
|
— |
| Assets (liabilities) |
1,407,000,000
GBP
|
1,397,000,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
1,114,000,000
GBP
|
883,000,000
GBP
|
— |
| Current liabilities |
1,185,000,000
GBP
|
1,326,000,000
GBP
|
— |
| Assets less current liabilities [abstract] |