Statement Of Financial Position [Abstract]
| Concept |
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 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 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] | |||||||||||||||||||||||||||||||||||||
| Non-current assets [abstract] | |||||||||||||||||||||||||||||||||||||
| Property, plant and equipment |
350,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
428,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Investment property |
5,899,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
7,003,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Goodwill |
2,072,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,741,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill |
2,089,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,950,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
611,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
138,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||||||||||||||||||||||||||
| Cash and cash equivalents |
22,505,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
12,485,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets |
315,316,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
358,474,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||||||||||||||||||
| Issued capital |
1,124,000,000
GBP
|
— | — | — | — | — | — |
924,000,000
GBP
|
— | — | — | — |
200,000,000
GBP
|
— | — | — |
1,141,000,000
GBP
|
— | — | — | — |
941,000,000
GBP
|
200,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
327,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
7,556,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium |
1,263,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,248,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Treasury shares |
85,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
51,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves |
130,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
66,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
12,585,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
19,202,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests |
310,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
252,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
12,895,000,000
GBP
|
130,000,000
GBP
|
200,000,000
GBP
|
924,000,000
GBP
|
496,000,000
GBP
|
10,342,000,000
GBP
|
310,000,000
GBP
|
— |
327,000,000
GBP
|
85,000,000
GBP
|
511,000,000
GBP
|
12,585,000,000
GBP
|
— |
51,000,000
GBP
|
7,556,000,000
GBP
|
66,000,000
GBP
|
19,454,000,000
GBP
|
941,000,000
GBP
|
200,000,000
GBP
|
10,308,000,000
GBP
|
—
GBP
|
— | — |
19,202,000,000
GBP
|
252,000,000
GBP
|
314,000,000
GBP
|
7,468,000,000
GBP
|
1,006,000,000
GBP
|
19,554,000,000
GBP
|
6,000,000
GBP
|
862,000,000
GBP
|
212,000,000
GBP
|
10,260,000,000
GBP
|
20,560,000,000
GBP
|
200,000,000
GBP
|
—
GBP
|
982,000,000
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||||||||||||||||||
| Non-current liabilities [abstract] | |||||||||||||||||||||||||||||||||||||
| Deferred tax liabilities |
825,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,983,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
302,421,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
339,020,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities |
315,316,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
358,474,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |