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 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 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 |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Other financial assets | — | — |
51,102,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
30,895,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — |
118,824,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
158,449,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
190,706,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
139,199,000,000
GBP
|
— |
| Assets | — | — |
692,673,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
720,053,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Treasury shares |
358,800,000
GBP
|
— | — |
503,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
258,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
371,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — |
37,157,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
36,488,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests | — | — |
31,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
8,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity | — |
10,844,000,000
GBP
|
37,188,000,000
GBP
|
2,004,000,000
GBP
|
10,645,000,000
GBP
|
31,000,000
GBP
|
841,000,000
GBP
|
10,881,000,000
GBP
|
37,157,000,000
GBP
|
1,899,000,000
GBP
|
49,000,000
GBP
|
3,890,000,000
GBP
|
11,700,000,000
GBP
|
36,496,000,000
GBP
|
8,000,000
GBP
|
10,019,000,000
GBP
|
1,478,000,000
GBP
|
10,881,000,000
GBP
|
36,488,000,000
GBP
|
102,000,000
GBP
|
3,890,000,000
GBP
|
2,771,000,000
GBP
|
1,393,000,000
GBP
|
12,629,000,000
GBP
|
12,966,000,000
GBP
|
3,890,000,000
GBP
|
41,803,000,000
GBP
|
395,000,000
GBP
|
269,000,000
GBP
|
10,881,000,000
GBP
|
41,796,000,000
GBP
|
7,000,000
GBP
|
1,205,000,000
GBP
|
351,000,000
GBP
|
24,000,000
GBP
|
12,567,000,000
GBP
|
36,000,000
GBP
|
13,240,000,000
GBP
|
229,000,000
GBP
|
4,999,000,000
GBP
|
43,860,000,000
GBP
|
10,881,000,000
GBP
|
1,608,000,000
GBP
|
43,824,000,000
GBP
|
360,000,000
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Other financial liabilities | — | — |
55,089,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
49,107,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — |
655,485,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
683,557,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities | — | — |
692,673,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
720,053,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |