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 |
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 |
2021-01-01 to 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||||||
| Profit (loss) |
–
GBP
|
–
GBP
|
82,500,000
GBP
|
8 5 .1
GBP
|
2 .6
GBP
|
25 5. 5
GBP
|
–
GBP
|
338 . 0
GBP
|
–
GBP
|
–
GBP
|
0. 5
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1 0 5 .1
GBP
|
25,900,000
GBP
|
–
GBP
|
–
GBP
|
7 9. 2
GBP
|
7 9 .7
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 4 .4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
3 0 .7
GBP
|
— |
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||||
| Cash flow hedges [abstract] | ||||||||||||||||||||
| Gains (losses) on cash flow hedges, before tax | — | — |
5 9 3 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
18 2 . 0
GBP
|
— |
| Reclassification adjustments on cash flow hedges, before tax | — | — |
432. 9
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
12 . 6
GBP
|
— |
| Cost of hedging [abstract] | ||||||||||||||||||||
| Change in value of foreign currency basis spreads [abstract] | ||||||||||||||||||||
| Other comprehensive income, before tax, change in value of foreign currency basis spreads | — | — |
1 9. 0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1 7. 3
GBP
|
— |
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract] | ||||||||||||||||||||
| Income tax relating to remeasurements of defined benefit plans included in other comprehensive income | — | — |
6 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
7 .2
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 | — | — |
43 .9
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
3 7. 6
GBP
|
— |
| Income tax relating to change in value of foreign currency basis spreads included in other comprehensive income | — | — |
2,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
7. 7
GBP
|
— |
| Other comprehensive income |
–
GBP
|
42,400,000
GBP
|
50,400,000
GBP
|
18 . 3
GBP
|
3,400,000
GBP
|
— |
39 .7
GBP
|
— |
16 . 8
GBP
|
–
GBP
|
2,600,000
GBP
|
9,600,000
GBP
|
8 .7
GBP
|
–
GBP
|
— | — |
127 . 1
GBP
|
–
GBP
|
82 . 5
GBP
|
28 .9
GBP
|
| Comprehensive income |
–
GBP
|
42,400,000
GBP
|
13 2 . 9
GBP
|
66. 8
GBP
|
0. 8
GBP
|
— |
3 9.7
GBP
|
— |
16 . 8
GBP
|
–
GBP
|
3 .1
GBP
|
9,600,000
GBP
|
8,700,000
GBP
|
–
GBP
|
— | — |
1 2 7.1
GBP
|
–
GBP
|
3,300,000
GBP
|
10 8 .6
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — |
13 2 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
0 . 2
GBP
|
— |
| Comprehensive income, attributable to non-controlling interests | — | — |
800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
3 .1
GBP
|
— |