Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
23 7
GBP
|
263,000,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
1,498,000,000
GBP
|
1,542,000,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
81,000,000
GBP
|
62,000,000
GBP
|
— |
| Non-current prepayments and non-current accrued income including non-current contract assets [abstract] | |||
| Non-current accrued income including non-current contract assets [abstract] | |||
| Non-current contract assets |
4,000,000
GBP
|
13,000,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
162,000,000
GBP
|
187,000,000
GBP
|
— |
| Non-current derivative financial assets |
1,000,000
GBP
|
1,000,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
682,000,000
GBP
|
630,000,000
GBP
|
— |
| Current prepayments and current accrued income including current contract assets [abstract] | |||
| Current accrued income including current contract assets [abstract] | |||
| Current contract assets |
172,000,000
GBP
|
18 9
GBP
|
— |
| Trade and other receivables [abstract] | |||
| Trade and other receivables |
763,000,000
GBP
|
692,000,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
427,000,000
GBP
|
340,000,000
GBP
|
348,000,000
GBP
|
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | |||
| Non-current assets or disposal groups classified as held for sale |
–
GBP
|
66,000,000
GBP
|
— |
| Miscellaneous current assets [abstract] | |||
| Current derivative financial assets |
4,000,000
GBP
|
4,000,000
GBP
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
723,000,000
GBP
|
758,000,000
GBP
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
10,000,000
GBP
|
5,000,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other non-current payables [abstract] | |||
| Non-current trade payables |
33,000,000
GBP
|
2 5
GBP
|
— |
| Other non-current payables |
63,000,000
GBP
|
67,000,000
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 contract liabilities [abstract] | |||
| Current contract liabilities |
234,000,000
GBP
|
187,000,000
GBP
|
— |
| Trade and other current payables |
899,000,000
GBP
|
950,000,000
GBP
|
— |
| Trade and other payables [abstract] | |||
| Trade and other payables |
932,000,000
GBP
|
975,000,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
25,000,000
GBP
|
26,000,000
GBP
|
— |
| Non-current derivative financial liabilities |
20,000,000
GBP
|
16,000,000
GBP
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Current derivative financial liabilities |
3,000,000
GBP
|
1,000,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
394,000,000
GBP
|
406,000,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
923,000,000
GBP
|
91 9
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets (liabilities) |
1,832,000,000
GBP
|
1,828,000,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
2,16 6
GBP
|
2,049,000,000
GBP
|
— |
| Current liabilities |
1,329,000,000
GBP
|
1 ,323
GBP
|
— |
| Current assets (liabilities) |
837,000,000
GBP
|
726,000,000
GBP
|
— |
| Assets less current liabilities [abstract] |