Analysis Of Income And Expense [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||
| Revenue | — |
2 3,07 8
GBP
|
— | — | — | — | — | — | — | — | — | — |
21, 2 5 8
GBP
|
— | — | — | — | — |
| Material income and expense [abstract] | ||||||||||||||||||
| Finance income (cost) | — |
2 47
GBP
|
— | — | — | — | — | — | — | — | — | — |
395,000,000
GBP
|
— | — | — | — | — |
| Operating expense | — |
20,91 7
GBP
|
— | — | — | — | — | — | — | — | — | — |
19, 2 6 9
GBP
|
— | — | — | — | — |
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||||||||||||||||||
| Share of profit (loss) of associates and joint ventures accounted for using equity method | — |
20 8
GBP
|
— | — | — | — | — | — | — | — | — | — |
18 0
GBP
|
— | — | — | — | — |
| Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax [abstract] | ||||||||||||||||||
| Share of other comprehensive income of associates and joint ventures accounted for using equity method that will not be reclassified to profit or loss, net of tax | — |
2 5
GBP
|
— | — | — |
–
GBP
|
— |
25,000,000
GBP
|
— | — | — | — |
11 6
GBP
|
— | — | — |
–
GBP
|
11 6
GBP
|
| Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax | — |
11,000,000
GBP
|
— | — | — |
11,000,000
GBP
|
— |
–
GBP
|
— | — | — | — |
8,000,000
GBP
|
— | — | — |
8,000,000
GBP
|
–
GBP
|
| Income tax relating to components of other comprehensive income [abstract] | ||||||||||||||||||
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss | — |
4,000,000
GBP
|
— | — | — |
–
GBP
|
— |
4,000,000
GBP
|
— | — | — | — |
357,000,000
GBP
|
— | — | — |
–
GBP
|
357,000,000
GBP
|
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — |
3,000,000
GBP
|
— | — | — |
3,000,000
GBP
|
— |
–
GBP
|
— | — | — | — |
24,000,000
GBP
|
— | — | — |
24,000,000
GBP
|
–
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income |
–
GBP
|
731,000,000
GBP
|
67,000,000
GBP
|
1 ,17 5
GBP
|
–
GBP
|
519,000,000
GBP
|
664,000,000
GBP
|
1, 2 50
GBP
|
511,000,000
GBP
|
–
GBP
|
5, 239
GBP
|
1, 0 5 3
GBP
|
5, 358
GBP
|
–
GBP
|
4 ,1 8 6
GBP
|
119,000,000
GBP
|
1, 0 74
GBP
|
4, 28 4
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — |
66 4
GBP
|
— | — | — |
511,000,000
GBP
|
— |
1 ,17 5
GBP
|
— | — | — | — |
5,23 9
GBP
|
— | — | — |
1, 0 5 3
GBP
|
4 ,1 8 6
GBP
|
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — |
67,000,000
GBP
|
— | — | — |
8,000,000
GBP
|
— |
75,000,000
GBP
|
— | — | — | — |
11 9
GBP
|
— | — | — |
21,000,000
GBP
|
98,000,000
GBP
|