Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2024-09-30 |
As at 2024-09-30 |
As at 2024-09-30 |
As at 2024-09-30 |
As at 2024-09-30 |
As at 2024-09-30 |
As at 2024-09-30 |
2023-10-01 to 2024-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
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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 |
3,742,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
3,722,300,000
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 |
1,849,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,793,700,000
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 |
1,893,700,000
GBP
|
20,100,000
GBP
|
37,200,000
GBP
|
4,400,000
GBP
|
817,900,000
GBP
|
1,013,800,000
GBP
|
300,000
GBP
|
— |
20,000,000
GBP
|
20,100,000
GBP
|
1,033,200,000
GBP
|
817,800,000
GBP
|
37,200,000
GBP
|
1,928,600,000
GBP
|
300,000
GBP
|
32,100,000
GBP
|
20,100,000
GBP
|
817,600,000
GBP
|
1,966,800,000
GBP
|
1,059,600,000
GBP
|
37,100,000
GBP
|
300,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |