Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
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 |
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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 |
2,431,100,000
GBP
|
15,500,000
GBP
|
707,700,000
GBP
|
1,645,700,000
GBP
|
15,100,000
GBP
|
47,100,000
GBP
|
1,765,900,000
GBP
|
1,073,000,000
GBP
|
43,800,000
GBP
|
12,800,000
GBP
|
707,700,000
GBP
|
16,200,000
GBP
|
1,595,100,000
GBP
|
842,600,000
GBP
|
16,200,000
GBP
|
9,300,000
GBP
|
19,300,000
GBP
|
707,700,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |