Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
60,800,000
GBP
|
47,900,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
3,140,900,000
GBP
|
2,972,700,000
GBP
|
— |
| Goodwill |
6,629,800,000
GBP
|
5,880,300,000
GBP
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments accounted for using equity method |
58,800,000
GBP
|
35,500,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Other non-current receivables |
32,600,000
GBP
|
49,700,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
48,100,000
GBP
|
55,800,000
GBP
|
— |
| Non-current derivative financial assets |
–
GBP
|
2,200,000
GBP
|
— |
| Non-current finance lease receivables |
8,200,000
GBP
|
5,100,000
GBP
|
— |
| Non-current investments other than investments accounted for using equity method |
260,800,000
GBP
|
262,700,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
546,900,000
GBP
|
460,400,000
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
36,200,000
GBP
|
28,800,000
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
389,300,000
GBP
|
2,125,800,000
GBP
|
884,800,000
GBP
|
| Miscellaneous current assets [abstract] | |||
| Current derivative financial assets |
600,000
GBP
|
–
GBP
|
— |
| Current finance lease receivables |
2,300,000
GBP
|
1,600,000
GBP
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
1,514,500,000
GBP
|
1,542,400,000
GBP
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
–
GBP
|
398,400,000
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 including non-current contract liabilities |
7,600,000
GBP
|
2,300,000
GBP
|
— |
| Trade and other non-current payables |
24,900,000
GBP
|
16,300,000
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 including current contract liabilities |
972,800,000
GBP
|
834,500,000
GBP
|
— |
| Trade and other current payables |
635,700,000
GBP
|
661,900,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
6,400,000
GBP
|
6,700,000
GBP
|
— |
| Non-current derivative financial liabilities |
77,900,000
GBP
|
168,100,000
GBP
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Current derivative financial liabilities |
–
GBP
|
1,100,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
1,400,000
GBP
|
1,400,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
2,853,500,000
GBP
|
3,168,400,000
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
75,600,000
GBP
|
175,500,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
11,524,200,000
GBP
|
12,145,700,000
GBP
|
— |
| Liabilities |
4,339,600,000
GBP
|
4,679,400,000
GBP
|
— |
| Assets (liabilities) |
7,184,600,000
GBP
|
7,466,300,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
1,055,500,000
GBP
|
2,624,000,000
GBP
|
— |
| Current liabilities |
1,789,200,000
GBP
|
2,008,800,000
GBP
|
— |
| Assets less current liabilities [abstract] |