Statement Of Comprehensive Income [Abstract]
| Concept |
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 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||
| Profit (loss) |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
7 8 7. 2
GBP
|
7 8 7. 2
GBP
|
638,400,000
GBP
|
–
GBP
|
638,400,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
| Other comprehensive income [abstract] | ||||||||||||
| Other comprehensive income |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
58,500,000
GBP
|
58,500,000
GBP
|
36. 0
GBP
|
–
GBP
|
36,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
| Comprehensive income | — | — | — | — |
8 45 .7
GBP
|
— | — | — |
602,400,000
GBP
|
— | — | — |