Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
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 |
1,000,700,000
GBP
|
896 .4
GBP
|
| Intangible assets and goodwill [abstract] | ||
| Intangible assets other than goodwill [abstract] | ||
| Intangible assets other than goodwill |
1, 4 51 .9
GBP
|
1 , 3 5 9. 5
GBP
|
| Goodwill |
8, 453. 4
GBP
|
7,612,300,000
GBP
|
| Investments accounted for using equity method [abstract] | ||
| Investments accounted for using equity method |
3 05 .1
GBP
|
41 2 .9
GBP
|
| Trade and other non-current receivables [abstract] | ||
| Trade and other non-current receivables |
218,600,000
GBP
|
152 .6
GBP
|
| Trade and other current receivables [abstract] | ||
| Trade and other current receivables |
1 2 , 4 9 9. 7
GBP
|
11, 3 62. 3
GBP
|
| Cash and cash equivalents [abstract] | ||
| Cash and cash equivalents |
2 , 491 . 5
GBP
|
3 , 8 8 2 .9
GBP
|
| Miscellaneous assets [abstract] | ||
| Investments other than investments accounted for using equity method |
3 6 9. 8
GBP
|
318,300,000
GBP
|
| Borrowings [abstract] | ||
| Non-current portion of non-current borrowings |
3, 8 01 . 8
GBP
|
4 , 21 6. 8
GBP
|
| Current borrowings and current portion of non-current borrowings [abstract] | ||
| Current borrowings |
1 ,1 6 9. 0
GBP
|
567 .2
GBP
|
| Non-current portion of non-current borrowings, by type [abstract] | ||
| Trade and other non-current payables [abstract] | ||
| Trade and other non-current payables |
4 90 .9
GBP
|
619,900,000
GBP
|
| Trade and other current payables [abstract] | ||
| Trade and other current payables |
15,83 4 . 9
GBP
|
15,252. 3
GBP
|
| Miscellaneous non-current liabilities [abstract] | ||
| Non-current net defined benefit liability |
137,500,000
GBP
|
136,600,000
GBP
|
| Issued capital [abstract] | ||
| Issued capital |
1 1 4 .1
GBP
|
12 2.4
GBP
|
| Retained earnings [abstract] | ||
| Retained earnings |
3,75 9 .7
GBP
|
4 , 3 67. 3
GBP
|
| Net assets (liabilities) [abstract] | ||
| Assets (liabilities) |
4 ,1 60 . 4
GBP
|
4 , 0 6 9. 0
GBP
|
| Net current assets (liabilities) [abstract] | ||
| Current assets |
15,09 8. 3
GBP
|
15, 33 5.6
GBP
|
| Current liabilities |
17 ,708.3
GBP
|
16 ,485.4
GBP
|
| Current assets (liabilities) |
2 , 61 0. 0
GBP
|
1 ,1 4 9. 8
GBP
|
| Assets less current liabilities [abstract] | ||
| Assets less current liabilities |
11,114 .2
GBP
|
11, 385 .4
GBP
|