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 |
1 40.5
GBP
|
1 1 8.6
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
1 65.4
GBP
|
1 7 3.0
GBP
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in subsidiaries reported in separate financial statements |
—
GBP
|
—
GBP
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments accounted for using equity method |
1. 0
GBP
|
300,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
6,900,000
GBP
|
300,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
12 7. 1
GBP
|
1 55.9
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
1 82.0
GBP
|
1 93.2
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
3,70 1 .2
GBP
|
3,462,900,000
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
420,100,000
GBP
|
86 1 .6
GBP
|
1 ,2 46.6
GBP
|
| Trade and other non-current payables [abstract] | |||
| Trade and other non-current payables |
1 78.7
GBP
|
2 1 4.8
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
82 1 .7
GBP
|
94 9.4
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
31 . 9
GBP
|
31 . 9
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
2,847 .7
GBP
|
2,868,500,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Capital redemption reserve |
236,500,000
GBP
|
2 36.5
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
4,7 87 .8
GBP
|
5,03 4.1
GBP
|
— |
| Liabilities |
1 ,369.3
GBP
|
1 ,59 4.8
GBP
|
— |
| Assets (liabilities) |
3,4 1 8.5
GBP
|
3,439,300,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
4,308,200,000
GBP
|
4,546,400,000
GBP
|
— |
| Current liabilities |
948,900,000
GBP
|
1 ,09 1 .5
GBP
|
— |
| Assets less current liabilities [abstract] |