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 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 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Property, plant and equipment |
1,513,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1,548,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Cash and cash equivalents |
46,484,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
49,254,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
46,697,000,000
GBP
|
— | — | — | — | — |
27,871,000,000
GBP
|
— | — | — | — | — |
| Assets |
285,213,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
287,098,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Issued capital |
3,105,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
3,105,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
4,848,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
5,053,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium |
5,620,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
5,620,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other equity interest |
1,956,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
2,191,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves |
1,122,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
133,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
14,407,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
16,102,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
14,407,000,000
GBP
|
—
GBP
|
5,620,000,000
GBP
|
4,848,000,000
GBP
|
3,105,000,000
GBP
|
1,000,000
GBP
|
14,407,000,000
GBP
|
5,000,000
GBP
|
1,956,000,000
GBP
|
1,128,000,000
GBP
|
5,053,000,000
GBP
|
2,191,000,000
GBP
|
16,102,000,000
GBP
|
107,000,000
GBP
|
25,000,000
GBP
|
16,102,000,000
GBP
|
5,620,000,000
GBP
|
—
GBP
|
1,000,000
GBP
|
3,105,000,000
GBP
|
4,348,000,000
GBP
|
162,000,000
GBP
|
481,000,000
GBP
|
15,774,000,000
GBP
|
3,105,000,000
GBP
|
2,191,000,000
GBP
|
1,000,000
GBP
|
5,620,000,000
GBP
|
15,936,000,000
GBP
|
28,000,000
GBP
|
15,857,000,000
GBP
|
2,191,000,000
GBP
|
160,000,000
GBP
|
1,000,000
GBP
|
16,017,000,000
GBP
|
5,620,000,000
GBP
|
4,546,000,000
GBP
|
23,000,000
GBP
|
371,000,000
GBP
|
3,105,000,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Liabilities |
270,806,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
270,996,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities |
285,213,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
287,098,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |