Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
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 |
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As at 2022-12-31 |
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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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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 assets [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [abstract] | |||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of assets [line items] | |||||||||||||||||||||||||||||||
| Assets | — | — |
5,028,000,000
GBP
|
— | — | — | — | — | — | — |
4,600,600,000
GBP
|
5,509,400,000
GBP
|
— | — | — | — | — | — | — |
4,110,200,000
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 | — | — |
1,519,200,000
GBP
|
— | — | — | — | — | — | — |
3,168,100,000
GBP
|
1,433,900,000
GBP
|
— | — | — | — | — | — | — |
2,779,900,000
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 |
196,600,000
GBP
|
— |
3,508,800,000
GBP
|
2,367,300,000
GBP
|
939,300,000
GBP
|
196,600,000
GBP
|
304,100,000
GBP
|
5,600,000
GBP
|
926,200,000
GBP
|
5,600,000
GBP
|
1,432,500,000
GBP
|
4,075,500,000
GBP
|
941,900,000
GBP
|
202,200,000
GBP
|
196,600,000
GBP
|
2,931,400,000
GBP
|
5,600,000
GBP
|
196,600,000
GBP
|
925,900,000
GBP
|
1,330,300,000
GBP
|
5,600,000
GBP
|
3,299,700,000
GBP
|
941,100,000
GBP
|
5,600,000
GBP
|
195,400,000
GBP
|
925,600,000
GBP
|
255,700,000
GBP
|
4,441,800,000
GBP
|
195,400,000
GBP
|
5,600,000
GBP
|
1,382,300,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |