Statement Of Comprehensive Income [Abstract]
| Concept |
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 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||||
| Profit (loss) |
–
GBP
|
1, 5 91
GBP
|
–
GBP
|
1, 6 74
GBP
|
–
GBP
|
1, 5 91
GBP
|
83,000,000
GBP
|
–
GBP
|
1, 674
GBP
|
15 4
GBP
|
–
GBP
|
–
GBP
|
1, 9 12
GBP
|
–
GBP
|
–
GBP
|
1, 7 5 8
GBP
|
1, 9 12
GBP
|
1, 75 8
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) on remeasurements of defined benefit plans | — | — | — |
2 , 8 51
GBP
|
— | — | — |
–
GBP
|
2 , 8 51
GBP
|
— | — |
–
GBP
|
2 , 4 51
GBP
|
— | — | — |
2 , 4 51
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 | — | — | — |
1 ,17 2
GBP
|
— | — | — |
1 ,1 7 2
GBP
|
–
GBP
|
— | — |
32,000,000
GBP
|
–
GBP
|
— | — | — |
32,000,000
GBP
|
— |
| Reclassification adjustments on exchange differences on translation of foreign operations, before tax | — | — | — |
17,000,000
GBP
|
— | — | — |
17,000,000
GBP
|
–
GBP
|
— | — |
9,000,000
GBP
|
–
GBP
|
— | — | — |
9,000,000
GBP
|
— |
| Cash flow hedges [abstract] | ||||||||||||||||||
| Gains (losses) on cash flow hedges, before tax | — | — | — |
10 2
GBP
|
— | — | — |
10 2
GBP
|
–
GBP
|
— | — |
11,000,000
GBP
|
–
GBP
|
— | — | — |
11,000,000
GBP
|
— |
| Reclassification adjustments on cash flow hedges, before tax | — | — | — |
5,000,000
GBP
|
— | — | — |
5,000,000
GBP
|
–
GBP
|
— | — |
32,000,000
GBP
|
–
GBP
|
— | — | — |
32,000,000
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 | — | — | — |
357,000,000
GBP
|
— | — | — |
–
GBP
|
357,000,000
GBP
|
— | — |
–
GBP
|
39 4
GBP
|
— | — | — |
39 4
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 | — | — | — |
24,000,000
GBP
|
— | — | — |
24,000,000
GBP
|
–
GBP
|
— | — |
4,000,000
GBP
|
–
GBP
|
— | — | — |
4,000,000
GBP
|
— |
| Other comprehensive income |
–
GBP
|
3, 6 48
GBP
|
1, 0 53
GBP
|
3,684,000,000
GBP
|
–
GBP
|
2, 595
GBP
|
36,000,000
GBP
|
1, 0 74
GBP
|
2 , 61 0
GBP
|
2,000,000
GBP
|
–
GBP
|
2,000,000
GBP
|
2 ,12 1
GBP
|
3,000,000
GBP
|
–
GBP
|
2 ,12 1
GBP
|
2 ,12 3
GBP
|
2 ,12 4
GBP
|
| Comprehensive income |
–
GBP
|
5,239,000,000
GBP
|
1, 0 53
GBP
|
5, 358
GBP
|
–
GBP
|
4 ,18 6
GBP
|
11 9
GBP
|
1, 0 74
GBP
|
4,28 4
GBP
|
15 6
GBP
|
–
GBP
|
2,000,000
GBP
|
4 ,033
GBP
|
3,000,000
GBP
|
–
GBP
|
3, 879
GBP
|
4,035,000,000
GBP
|
3,8 8 2
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — |
5,2 39
GBP
|
— | — | — |
1,0 53
GBP
|
4 ,1 8 6
GBP
|
— | — |
3,000,000
GBP
|
3,8 8 2
GBP
|
— | — | — |
3, 879
GBP
|
— |
| Comprehensive income, attributable to non-controlling interests | — | — | — |
119,000,000
GBP
|
— | — | — |
21,000,000
GBP
|
98,000,000
GBP
|
— | — |
5,000,000
GBP
|
151,000,000
GBP
|
— | — | — |
15 6
GBP
|
— |