Disclosure Of Fair Value Measurement [Text Block]
| Concept |
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 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 |
As at 2021-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | — | — | — |
2,511,900,000
GBP
|
— | — | — | — | — |
2,593,600,000
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 | — | — | — |
712,300,000
GBP
|
— | — | — | — | — |
87 4.1
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 |
181,100,000
GBP
|
295,500,000
GBP
|
1,300,300,000
GBP
|
1,7 99.6
GBP
|
32,600,000
GBP
|
9,900,000
GBP
|
9,600,000
GBP
|
1,219,400,000
GBP
|
33. 1
GBP
|
1,719,500,000
GBP
|
181,100,000
GBP
|
295,500,000
GBP
|
32,200,000
GBP
|
1,998,000,000
GBP
|
295,400,000
GBP
|
9,600,000
GBP
|
1 80.7
GBP
|
1,499,300,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |