Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
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 |
187,000,000
GBP
|
236,000,000
GBP
|
| Intangible assets and goodwill [abstract] | ||
| Intangible assets and goodwill |
704,000,000
GBP
|
501,000,000
GBP
|
| Investments accounted for using equity method [abstract] | ||
| Investments accounted for using equity method |
274,000,000
GBP
|
1,371,000,000
GBP
|
| Trade and other receivables [abstract] | ||
| Trade and other receivables |
680,000,000
GBP
|
621,000,000
GBP
|
| Categories of financial assets [abstract] | ||
| Financial assets |
4,316,000,000
GBP
|
3,110,000,000
GBP
|
| Cash and cash equivalents [abstract] | ||
| Cash and cash equivalents |
1,904,000,000
GBP
|
1,519,000,000
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 |
–
GBP
|
19,000,000
GBP
|
| Miscellaneous assets [abstract] | ||
| Net defined benefit asset |
1,607,000,000
GBP
|
1,474,000,000
GBP
|
| Other assets |
105,000,000
GBP
|
46,000,000
GBP
|
| Miscellaneous liabilities [abstract] | ||
| Net defined benefit liability |
38,000,000
GBP
|
55,000,000
GBP
|
| Derivative financial liabilities |
5,000,000
GBP
|
13,000,000
GBP
|
| Subordinated liabilities [abstract] | ||
| Subordinated liabilities |
644,000,000
GBP
|
638,000,000
GBP
|
| Investment contracts liabilities |
1,088,000,000
GBP
|
1,042,000,000
GBP
|
| Other liabilities |
8,000,000
GBP
|
6,000,000
GBP
|
| Issued capital [abstract] | ||
| Issued capital |
305,000,000
GBP
|
306,000,000
GBP
|
| Retained earnings [abstract] | ||
| Retained earnings |
5,775,000,000
GBP
|
4,970,000,000
GBP
|
| Net assets (liabilities) [abstract] | ||
| Assets |
11,418,000,000
GBP
|
10,478,000,000
GBP
|
| Liabilities |
3,562,000,000
GBP
|
3,665,000,000
GBP
|
| Assets less current liabilities [abstract] |