Statement Of Financial Position [Abstract]
| Concept |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements | — | — | — | — | — | — | — | — | — | — |
703,000,000
GBP
|
665,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — | — | — | — | — | — | — | — |
895,000,000
GBP
|
1,278,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Cash and cash equivalents | — | — | — | — | — | — | — | — | — | — |
162,928,000,000
GBP
|
177,037,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
189,907,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
140,923,000,000
GBP
|
— | — | — | — | — | — | — | — |
| Assets | — | — | — | — | — | — | — | — | — | — |
727,330,000,000
GBP
|
702,970,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Issued capital | — | — | — | — | — | — | — | — | — | — |
797,000,000
GBP
|
797,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — | — | — | — | — | — | — | — |
25,040,000,000
GBP
|
24,724,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium | — | — | — | — | — | — | — | — | — | — |
3,582,000,000
GBP
|
1,004,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other equity interest | — | — | — | — | — | — | — | — | — | — |
3,921,000,000
GBP
|
3,930,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves | — | — | — | — | — | — | — | — | — | — |
6,445,000,000
GBP
|
6,096,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — | — | — | — | — | — | — | — | — |
26,895,000,000
GBP
|
24,359,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests | — | — | — | — | — | — | — | — | — | — |
158,000,000
GBP
|
146,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
480,000,000
GBP
|
7,692,000,000
GBP
|
25,040,000,000
GBP
|
4,379,000,000
GBP
|
158,000,000
GBP
|
1,686,000,000
GBP
|
26,895,000,000
GBP
|
227,000,000
GBP
|
3,921,000,000
GBP
|
692,000,000
GBP
|
27,053,000,000
GBP
|
24,505,000,000
GBP
|
616,000,000
GBP
|
24,724,000,000
GBP
|
146,000,000
GBP
|
2,178,000,000
GBP
|
1,801,000,000
GBP
|
24,359,000,000
GBP
|
868,000,000
GBP
|
330,000,000
GBP
|
7,692,000,000
GBP
|
3,930,000,000
GBP
|
23,233,000,000
GBP
|
894,000,000
GBP
|
7,692,000,000
GBP
|
1,217,000,000
GBP
|
131,000,000
GBP
|
24,368,000,000
GBP
|
1,613,000,000
GBP
|
23,102,000,000
GBP
|
278,000,000
GBP
|
3,930,000,000
GBP
|
950,000,000
GBP
|
24,157,000,000
GBP
|
3,722,000,000
GBP
|
23,145,000,000
GBP
|
7,000,000
GBP
|
514,000,000
GBP
|
7,692,000,000
GBP
|
797,000,000
GBP
|
1,603,000,000
GBP
|
23,014,000,000
GBP
|
131,000,000
GBP
|
948,000,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Deferred tax liabilities | — | — | — | — | — | — | — | — | — | — |
5,000,000
GBP
|
6,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Liabilities included in disposal groups classified as held for sale | — | — | — | — | — | — | — | — | — | — |
23,110,000,000
GBP
|
20,684,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — | — | — | — | — | — | — | — |
700,277,000,000
GBP
|
678,465,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities | — | — | — | — | — | — | — | — | — | — |
727,330,000,000
GBP
|
702,970,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |