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 |
83,700,000
GBP
|
113,800,000
GBP
|
| Intangible assets and goodwill [abstract] | ||
| Intangible assets and goodwill |
822,200,000
GBP
|
822,500,000
GBP
|
| Investment property [abstract] | ||
| Investment property |
278,500,000
GBP
|
317,000,000
GBP
|
| Categories of financial assets [abstract] | ||
| Financial assets |
3,698,500,000
GBP
|
4,633,600,000
GBP
|
| Cash and cash equivalents [abstract] | ||
| Cash and cash equivalents |
1,003,600,000
GBP
|
955,700,000
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 or as held for distribution to owners |
40,900,000
GBP
|
41,200,000
GBP
|
| Miscellaneous assets [abstract] | ||
| Net defined benefit asset |
1,600,000
GBP
|
12,100,000
GBP
|
| Derivative financial assets |
31,300,000
GBP
|
35,900,000
GBP
|
| Classes of other provisions [abstract] | ||
| Other provisions [abstract] | ||
| Other provisions |
64,300,000
GBP
|
96,400,000
GBP
|
| Borrowings [abstract] | ||
| Borrowings |
65,200,000
GBP
|
59,200,000
GBP
|
| Borrowings, by type [abstract] | ||
| Trade and other payables [abstract] | ||
| Trade and other payables |
457,800,000
GBP
|
457,300,000
GBP
|
| Miscellaneous liabilities [abstract] | ||
| Derivative financial liabilities |
29,600,000
GBP
|
19,500,000
GBP
|
| Subordinated liabilities [abstract] | ||
| Subordinated liabilities |
258,600,000
GBP
|
513,600,000
GBP
|
| Net assets (liabilities) [abstract] | ||
| Assets |
8,354,600,000
GBP
|
9,308,600,000
GBP
|
| Liabilities |
6,074,100,000
GBP
|
6,411,900,000
GBP
|
| Assets less current liabilities [abstract] |