Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
89,800,000
GBP
|
103,200,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
248,300,000
GBP
|
179,900,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
297,000,000
GBP
|
372,700,000
GBP
|
351,700,000
GBP
|
| Miscellaneous assets [abstract] | |||
| Investments other than investments accounted for using equity method |
3,411,200,000
GBP
|
3,742,600,000
GBP
|
— |
| Loans and advances | — | — | — |
| Loans and advances to customers |
823,900,000
GBP
|
556,800,000
GBP
|
— |
| Trade and other payables [abstract] | |||
| Trade and other payables |
2,158,000,000
GBP
|
1,960,000,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
300,000
GBP
|
300,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
1,114,500,000
GBP
|
1,348,800,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
8,938,500,000
GBP
|
8,359,700,000
GBP
|
— |
| Liabilities |
7,983,100,000
GBP
|
6,951,200,000
GBP
|
— |
| Assets less current liabilities [abstract] |