Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2024-12-31 |
As at 2024-12-31 |
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2024-01-01 to 2024-12-31 |
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As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
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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 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 |
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| Disclosure of fair value measurement [text block] | — | — | — | — | — | — |
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| 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, 827
GBP
|
579,000,000
GBP
|
109,000,000
GBP
|
259,000,000
GBP
|
1 91
GBP
|
3, 475
GBP
|
— |
151,000,000
GBP
|
3,73 4
GBP
|
3,833,000,000
GBP
|
3, 488
GBP
|
1 87
GBP
|
4 57
GBP
|
577,000,000
GBP
|
11 4
GBP
|
99 0
GBP
|
3 , 3 76
GBP
|
4 ,1 60
GBP
|
285,000,000
GBP
|
479,000,000
GBP
|
5 76
GBP
|
3 , 76 0
GBP
|
1 ,0 54
GBP
|
114,000,000
GBP
|
3,681,000,000
GBP
|
1 ,11 2
GBP
|
4 ,366
GBP
|
3 3 6
GBP
|
4 ,06 8
GBP
|
3,615,000,000
GBP
|
575,000,000
GBP
|
4 53
GBP
|
122,000,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |