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 |
1, 953
GBP
|
2,536,000,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
1, 877
GBP
|
1,61 5
GBP
|
— |
| Investment property [abstract] | |||
| Investment property |
16, 505
GBP
|
19,698,000,000
GBP
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments accounted for using equity method |
413,000,000
GBP
|
4 69
GBP
|
— |
| Categories of financial assets [abstract] | |||
| Loans and receivables |
3,3 30
GBP
|
5,809,000,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
4 ,884
GBP
|
6,908,000,000
GBP
|
6,7 76
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 |
684,000,000
GBP
|
1,023,000,000
GBP
|
— |
| Miscellaneous assets [abstract] | |||
| Net defined benefit asset |
155,000,000
GBP
|
38,000,000
GBP
|
— |
| Derivative financial assets |
2, 850
GBP
|
3 ,373
GBP
|
— |
| Equity instruments held |
7 0 ,1 2 7
GBP
|
74 , 0 6 9
GBP
|
— |
| Debt instruments held [abstract] | |||
| Debt instruments held |
62 ,821
GBP
|
81,059,000,000
GBP
|
— |
| Miscellaneous liabilities [abstract] | |||
| Net defined benefit liability |
—
GBP
|
84,000,000
GBP
|
— |
| Derivative financial liabilities |
4 ,1 8 5
GBP
|
2 ,689
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
11 9
GBP
|
130,000,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
14 ,02 3
GBP
|
16, 55 0
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
191, 560
GBP
|
2 1 9 ,1 3 4
GBP
|
— |
| Liabilities |
18 8,7 30
GBP
|
21 3 ,78 9
GBP
|
— |
| Assets less current liabilities [abstract] |