Disclosure Of Fair Value Measurement [Text Block]
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| 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 | — |
2 8 , 3 4 7. 9
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2 8 ,17 3 . 4
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 | — |
2 5 , 9 0 7. 9
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
25, 683. 0
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 7 7. 0
GBP
|
2,440,000,000
GBP
|
348 .4
GBP
|
2,800,000
GBP
|
5 9 7. 1
GBP
|
32 2. 4
GBP
|
4 . 3
GBP
|
2 , 119. 5
GBP
|
94,600,000
GBP
|
1. 9
GBP
|
103. 9
GBP
|
1,056 .6
GBP
|
1 .9
GBP
|
2 ,19 8 . 3
GBP
|
103 . 8
GBP
|
5 9 7. 1
GBP
|
94. 5
GBP
|
294. 0
GBP
|
2 , 490 . 4
GBP
|
3. 3
GBP
|
348 .4
GBP
|
5 .4
GBP
|
2 , 0 2 7. 8
GBP
|
0. 8
GBP
|
94. 5
GBP
|
597 .1
GBP
|
2, 321 . 0
GBP
|
885 .9
GBP
|
10 3. 5
GBP
|
34 8.4
GBP
|
6 .0
GBP
|
294 .0
GBP
|
4,400,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |