Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of fair value measurement [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of assets [line items] | ||||||||||||||||||||||||||||||||||||||||
| Assets | — | — |
1,7 6 8 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1,7 9 6 . 2
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,949 .6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, assets [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [line items] | ||||||||||||||||||||||||||||||||||||||||
| Liabilities | — | — |
50 6 . 8
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
576 . 5
GBP
|
— | — | — | — | — | — | — | — | — | — |
647,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of equity [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of equity [line items] | ||||||||||||||||||||||||||||||||||||||||
| Equity |
9 57. 5
GBP
|
0 .7
GBP
|
1,261. 3
GBP
|
3 . 5
GBP
|
3 .1
GBP
|
231,400,000
GBP
|
66. 2
GBP
|
5,800,000
GBP
|
882 .6
GBP
|
1 .9
GBP
|
6 .0
GBP
|
3 .1
GBP
|
9 8.0
GBP
|
231,400,000
GBP
|
1 , 2 1 9.7
GBP
|
0. 5
GBP
|
1, 321. 5
GBP
|
6,000,000
GBP
|
3 .1
GBP
|
–
GBP
|
18 .9
GBP
|
18 .9
GBP
|
98 .6
GBP
|
231,400,000
GBP
|
3 .1
GBP
|
1 , 302 .6
GBP
|
98,600,000
GBP
|
96 4.4
GBP
|
0. 5
GBP
|
2 31.4
GBP
|
1. 4
GBP
|
1 .4
GBP
|
–
GBP
|
–
GBP
|
6,000,000
GBP
|
500,000
GBP
|
–
GBP
|
–
GBP
|
983. 3
GBP
|
–
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |