Statement Of Financial Position [Abstract]
| Concept |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||||||||||||
| Other financial assets |
31,944,000,000
GBP
|
— | — | — | — | — | — | — | — |
14,546,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets |
415,468,000,000
GBP
|
— | — | — | — | — | — | — | — |
409,469,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||||||||||||
| Equity attributable to owners of parent |
21,395,000,000
GBP
|
— | — | — | — | — | — | — | — |
20,066,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests |
35,000,000
GBP
|
— | — | — | — | — | — | — | — |
10,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
21,430,000,000
GBP
|
14,871,000,000
GBP
|
35,000,000
GBP
|
28,000,000
GBP
|
21,395,000,000
GBP
|
600,000,000
GBP
|
41,000,000
GBP
|
2,518,000,000
GBP
|
104,000,000
GBP
|
20,076,000,000
GBP
|
10,000,000
GBP
|
2,225,000,000
GBP
|
820,000,000
GBP
|
13,302,000,000
GBP
|
1,678,000,000
GBP
|
77,000,000
GBP
|
20,066,000,000
GBP
|
76,000,000
GBP
|
2,518,000,000
GBP
|
391,000,000
GBP
|
87,000,000
GBP
|
13,507,000,000
GBP
|
820,000,000
GBP
|
2,377,000,000
GBP
|
1,000,000
GBP
|
192,000,000
GBP
|
14,000,000
GBP
|
85,000,000
GBP
|
10,000,000
GBP
|
2,225,000,000
GBP
|
1,678,000,000
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||||||||||||
| Other financial liabilities |
9,011,000,000
GBP
|
— | — | — | — | — | — | — | — |
5,384,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
394,038,000,000
GBP
|
— | — | — | — | — | — | — | — |
389,393,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities |
415,468,000,000
GBP
|
— | — | — | — | — | — | — | — |
409,469,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |