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
|
11. 2
GBP
|
–
GBP
|
6 . 2
GBP
|
–
GBP
|
–
GBP
|
11. 2
GBP
|
5,000,000
GBP
|
–
GBP
|
4 .9
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
117. 0
GBP
|
121,900,000
GBP
|
117. 0
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 | — | — | — |
1. 5
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1. 6
GBP
|
— |
| Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans | — | — | — |
12 . 1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
58,200,000
GBP
|
— |
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||
| Exchange differences on translation [abstract] | ||||||||||||||||||
| Reclassification adjustments on exchange differences on translation of foreign operations, before tax | — | — | — |
9 9. 0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
10 8 . 2
GBP
|
— |
| Other comprehensive income, before tax, exchange differences on translation of foreign operations | — | — | — |
1 32.4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
10 4 . 2
GBP
|
— |
| Cash flow hedges [abstract] | ||||||||||||||||||
| Other comprehensive income, before tax, cash flow hedges | — | — | — |
8,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
18,500,000
GBP
|
— |
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract] | ||||||||||||||||||
| Income tax relating to investments in equity instruments included in other comprehensive income | — | — | — |
0. 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— |
| Income tax relating to remeasurements of defined benefit plans included in other comprehensive income | — | — | — |
0 . 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
400,000
GBP
|
— |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract] | ||||||||||||||||||
| Income tax relating to cash flow hedges included in other comprehensive income | — | — | — |
6. 6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
2,800,000
GBP
|
— |
| Other comprehensive income |
–
GBP
|
2 81.9
GBP
|
293,600,000
GBP
|
288,000,000
GBP
|
–
GBP
|
–
GBP
|
11 . 7
GBP
|
6 .1
GBP
|
–
GBP
|
800,000
GBP
|
–
GBP
|
–
GBP
|
2 2.0
GBP
|
–
GBP
|
–
GBP
|
7 9. 8
GBP
|
7 9. 0
GBP
|
5 7. 8
GBP
|
| Comprehensive income |
–
GBP
|
270. 7
GBP
|
293,600,000
GBP
|
2 81. 8
GBP
|
–
GBP
|
–
GBP
|
2 2 .9
GBP
|
11 .1
GBP
|
–
GBP
|
4 .1
GBP
|
–
GBP
|
–
GBP
|
22. 0
GBP
|
–
GBP
|
–
GBP
|
19 6 . 8
GBP
|
2 0 0 .9
GBP
|
174 . 8
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — |
270. 7
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
19 6 . 8
GBP
|
— |
| Comprehensive income, attributable to non-controlling interests | — | — | — |
11 . 1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
4 .1
GBP
|
— |