Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2022-12-31 |
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As at 2020-12-31 |
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| Disclosure of fair value measurement [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 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 |
4 ,1 60 . 4
GBP
|
285,200,000
GBP
|
4 7 9. 6
GBP
|
575 .9
GBP
|
3,75 9 .7
GBP
|
1 ,0 5 4 .1
GBP
|
1 14 .1
GBP
|
3,6 80.8
GBP
|
1 ,11 2 .1
GBP
|
4 , 3 67. 3
GBP
|
3 3 5.9
GBP
|
4 , 0 6 9. 0
GBP
|
3,61 6.4
GBP
|
4 52. 6
GBP
|
5 74 . 7
GBP
|
122. 4
GBP
|
570. 3
GBP
|
4 ,9 5 9. 2
GBP
|
3 1 8 .1
GBP
|
1 2 9. 6
GBP
|
4,732. 0
GBP
|
191. 2
GBP
|
1 ,1 1 8 . 3
GBP
|
5, 0 5 0 .1
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |