Statement Of Comprehensive Income [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
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 |
2023-01-01 to 2023-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||||
| Profit (loss) |
85,000,000
GBP
|
2 , 0 41
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
2 , 0 41
GBP
|
–
GBP
|
1, 9 5 6
GBP
|
1, 9 56
GBP
|
–
GBP
|
1, 9 4 0
GBP
|
83,000,000
GBP
|
1, 8 5 7
GBP
|
–
GBP
|
–
GBP
|
1, 9 4 0
GBP
|
1, 8 5 7
GBP
|
–
GBP
|
| Other comprehensive income [abstract] | ||||||||||||||||||
| Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||
| Other comprehensive income, before tax, gains (losses) from investments in equity instruments | — |
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — | — | — |
11,000,000
GBP
|
— | — | — |
–
GBP
|
11,000,000
GBP
|
— | — |
| Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans | — |
414,000,000
GBP
|
— | — |
–
GBP
|
414,000,000
GBP
|
— | — | — | — |
658,000,000
GBP
|
— | — | — |
–
GBP
|
65 8
GBP
|
— | — |
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||
| Exchange differences on translation [abstract] | ||||||||||||||||||
| Gains (losses) on exchange differences on translation of foreign operations, before tax | — |
4,000,000
GBP
|
— | — |
4,000,000
GBP
|
–
GBP
|
— | — | — | — |
51 0
GBP
|
— | — | — |
51 0
GBP
|
–
GBP
|
— | — |
| Reclassification adjustments on exchange differences on translation of foreign operations, before tax | — |
3,000,000
GBP
|
— | — |
3,000,000
GBP
|
–
GBP
|
— | — | — | — |
–
GBP
|
— | — | — |
–
GBP
|
–
GBP
|
— | — |
| Cash flow hedges [abstract] | ||||||||||||||||||
| Gains (losses) on cash flow hedges, before tax | — |
3 6
GBP
|
— | — |
3 6
GBP
|
–
GBP
|
— | — | — | — |
4,000,000
GBP
|
— | — | — |
4,000,000
GBP
|
–
GBP
|
— | — |
| Reclassification adjustments on cash flow hedges, before tax | — |
69,000,000
GBP
|
— | — |
69,000,000
GBP
|
–
GBP
|
— | — | — | — |
19,000,000
GBP
|
— | — | — |
19,000,000
GBP
|
–
GBP
|
— | — |
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract] | ||||||||||||||||||
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss | — |
2 5
GBP
|
— | — |
–
GBP
|
25,000,000
GBP
|
— | — | — | — |
4,000,000
GBP
|
— | — | — |
–
GBP
|
4,000,000
GBP
|
— | — |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract] | ||||||||||||||||||
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — |
7,000,000
GBP
|
— | — |
7,000,000
GBP
|
–
GBP
|
— | — | — | — |
3,000,000
GBP
|
— | — | — |
3,000,000
GBP
|
–
GBP
|
— | — |
| Other comprehensive income |
2,000,000
GBP
|
4 41
GBP
|
–
GBP
|
–
GBP
|
37,000,000
GBP
|
404,000,000
GBP
|
38,000,000
GBP
|
4 01
GBP
|
439,000,000
GBP
|
–
GBP
|
1, 2 0 9
GBP
|
16,000,000
GBP
|
6 82
GBP
|
–
GBP
|
519,000,000
GBP
|
69 0
GBP
|
1 ,19 3
GBP
|
511,000,000
GBP
|
| Comprehensive income |
87,000,000
GBP
|
2, 482
GBP
|
–
GBP
|
–
GBP
|
37,000,000
GBP
|
2 ,4 45
GBP
|
38,000,000
GBP
|
2 ,3 57
GBP
|
2 , 395
GBP
|
–
GBP
|
7 31
GBP
|
67,000,000
GBP
|
1,1 7 5
GBP
|
–
GBP
|
51 9
GBP
|
1, 25 0
GBP
|
664,000,000
GBP
|
5 11
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — |
2, 395
GBP
|
— | — |
38,000,000
GBP
|
2, 357
GBP
|
— | — | — | — |
66 4
GBP
|
— | — | — |
5 11
GBP
|
1,17 5
GBP
|
— | — |
| Comprehensive income, attributable to non-controlling interests | — |
87,000,000
GBP
|
— | — |
1,000,000
GBP
|
88,000,000
GBP
|
— | — | — | — |
67,000,000
GBP
|
— | — | — |
8,000,000
GBP
|
75,000,000
GBP
|
— | — |