Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-12-31 |
As at 2022-12-31 |
|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||
| Property, plant and equipment [abstract] | ||
| Property, plant and equipment |
163,000,000
GBP
|
201,000,000
GBP
|
| Intangible assets and goodwill [abstract] | ||
| Intangible assets and goodwill |
1 ,578
GBP
|
1,619,000,000
GBP
|
| Investments accounted for using equity method [abstract] | ||
| Investments accounted for using equity method |
229,000,000
GBP
|
232,000,000
GBP
|
| Trade and other receivables [abstract] | ||
| Trade and other receivables |
1,071,000,000
GBP
|
907,000,000
GBP
|
| Categories of financial assets [abstract] | ||
| Financial assets |
2,047,000,000
GBP
|
2 ,939
GBP
|
| Cash and cash equivalents [abstract] | ||
| Cash and cash equivalents |
1,196,000,000
GBP
|
1 ,133
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 |
19,000,000
GBP
|
87,000,000
GBP
|
| Miscellaneous assets [abstract] | ||
| Net defined benefit asset |
740,000,000
GBP
|
831,000,000
GBP
|
| Other assets |
77,000,000
GBP
|
92,000,000
GBP
|
| Classes of other provisions [abstract] | ||
| Other provisions [abstract] | ||
| Other provisions |
66,000,000
GBP
|
97,000,000
GBP
|
| Miscellaneous liabilities [abstract] | ||
| Net defined benefit liability |
12,000,000
GBP
|
12,000,000
GBP
|
| Derivative financial liabilities |
9,000,000
GBP
|
1,000,000
GBP
|
| Subordinated liabilities [abstract] | ||
| Subordinated liabilities |
599,000,000
GBP
|
621,000,000
GBP
|
| Investment contracts liabilities |
684,000,000
GBP
|
773,000,000
GBP
|
| Other liabilities |
4,000,000
GBP
|
8,000,000
GBP
|
| Issued capital [abstract] | ||
| Issued capital |
257,000,000
GBP
|
280,000,000
GBP
|
| Retained earnings [abstract] | ||
| Retained earnings |
4,449,000,000
GBP
|
4,986,000,000
GBP
|
| Net assets (liabilities) [abstract] | ||
| Assets |
8,031,000,000
GBP
|
9,212,000,000
GBP
|
| Liabilities |
2,941,000,000
GBP
|
3,370,000,000
GBP
|
| Assets less current liabilities [abstract] |