Analysis Of Income And Expense [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 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||||
| Revenue | — | — | — | — |
7, 6 4 0 .1
GBP
|
–
GBP
|
— | — |
7, 6 4 0 .1
GBP
|
— |
6,83 7 .8
GBP
|
— |
6,83 7 .8
GBP
|
–
GBP
|
— | — | — | — | — | — |
| Material income and expense [abstract] | ||||||||||||||||||||
| Operating expense | — | — | — | — |
812,800,000
GBP
|
101. 2
GBP
|
— | — |
9 14 . 0
GBP
|
— |
97 0.8
GBP
|
— |
725 .3
GBP
|
245,500,000
GBP
|
— | — | — | — | — | — |
| Miscellaneous other comprehensive income [abstract] | ||||||||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations | — | — | — | — | — | — | — | — |
10 4 . 3
GBP
|
— |
4 2 . 8
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 | — | — | — | — |
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
— |
–
GBP
|
— |
–
GBP
|
–
GBP
|
— | — | — | — | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| Comprehensive income |
4 .1
GBP
|
22,000,000
GBP
|
19 6 . 8
GBP
|
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
2 0 0 .9
GBP
|
174 . 8
GBP
|
18 6 . 0
GBP
|
13 0 . 0
GBP
|
— | — |
59,300,000
GBP
|
–
GBP
|
3,300,000
GBP
|
–
GBP
|
18 9. 3
GBP
|
–
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — | — | — | — |
19 6 . 8
GBP
|
— |
18 9. 3
GBP
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — | — | — | — |
4 .1
GBP
|
— |
3,300,000
GBP
|
— | — | — | — | — | — | — | — | — |