Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | — |
2,922,600,000
GBP
|
— | — | — | — | — | — | — |
3,120,500,000
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 | — |
1,335,100,000
GBP
|
— | — | — | — | — | — | — |
1,330,900,000
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 |
231,600,000
GBP
|
1,587,500,000
GBP
|
924,500,000
GBP
|
296,100,000
GBP
|
135,300,000
GBP
|
294,800,000
GBP
|
231,200,000
GBP
|
345,100,000
GBP
|
918,500,000
GBP
|
1,789,600,000
GBP
|
231,200,000
GBP
|
269,200,000
GBP
|
267,200,000
GBP
|
1,530,700,000
GBP
|
763,100,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |