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 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||||||||
| Non-current assets [abstract] | |||||||||||||||||||||||||||
| Property, plant and equipment |
1, 953
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
2,536,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Investment property |
16, 505
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
19,698,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Investments accounted for using equity method |
413,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
4 69
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
6 51
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
11 9
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||||||||||||||||
| Cash and cash equivalents |
4 ,884
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
6,908,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
6,7 76
GBP
|
| Assets |
191, 560
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
2 1 9 ,1 3 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||||||||
| Issued capital |
11 9
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
130,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
14 ,02 3
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
16, 55 0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium |
370,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
370,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Treasury shares |
47,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves |
1 1 , 61 3
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1 1,660
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
2,782,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
5,29 6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests |
48,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
49,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
2, 830
GBP
|
11 , 6 1 3
GBP
|
48,000,000
GBP
|
370,000,000
GBP
|
14 ,02 3
GBP
|
47,000,000
GBP
|
119,000,000
GBP
|
2,782,000,000
GBP
|
7 0
GBP
|
1,000,000
GBP
|
16, 550
GBP
|
93,000,000
GBP
|
1 1 , 6 6 0
GBP
|
5 ,345
GBP
|
5, 296
GBP
|
3 70
GBP
|
49,000,000
GBP
|
130,000,000
GBP
|
16, 85 3
GBP
|
8,000,000
GBP
|
117,000,000
GBP
|
5,57 7
GBP
|
13 0
GBP
|
1,000,000
GBP
|
11 , 6 5 8
GBP
|
370,000,000
GBP
|
5,585,000,000
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||||||||
| Non-current liabilities [abstract] | |||||||||||||||||||||||||||
| Deferred tax liabilities |
780,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1, 419
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | |||||||||||||||||||||||||||
| Liabilities included in disposal groups classified as held for sale |
172,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
18 8,7 30
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
21 3 ,78 9
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities |
191, 560
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
2 1 9 ,1 3 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |