Disclosure Of Fair Value Measurement [Text Block]
| Concept |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
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As at 2022-12-31 |
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As at 2021-12-31 |
As at 2021-12-31 |
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As at 2021-12-31 |
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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 | — |
7, 13 9
GBP
|
— | — | — | — | — | — | — | — |
6 ,9 6 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 | — |
5 , 519
GBP
|
— | — | — | — | — | — | — | — |
5 ,397
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 | — |
1, 6 2 0
GBP
|
94 0
GBP
|
14 3
GBP
|
6 3
GBP
|
99,000,000
GBP
|
14 7
GBP
|
42,000,000
GBP
|
312,000,000
GBP
|
1, 5 2 1
GBP
|
1, 5 67
GBP
|
69,000,000
GBP
|
34,000,000
GBP
|
14 7
GBP
|
14 3
GBP
|
82 0
GBP
|
38,000,000
GBP
|
1, 5 3 3
GBP
|
316,000,000
GBP
|
1, 0 0 9
GBP
|
14 2
GBP
|
228,000,000
GBP
|
1 ,1 31
GBP
|
–
GBP
|
1 ,1 0 9
GBP
|
22,000,000
GBP
|
14 7
GBP
|
39,000,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |