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 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2021-04-01 |
As at 2021-04-01 |
As at 2021-04-01 |
As at 2021-04-01 |
As at 2021-04-01 |
As at 2021-04-01 |
As at 2021-04-01 |
As at 2021-04-01 |
As at 2021-04-01 |
As at 2021-04-01 |
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 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2020-04-01 |
As at 2020-04-01 |
As at 2020-04-01 |
As at 2020-04-01 |
As at 2020-04-01 |
As at 2020-04-01 |
As at 2020-04-01 |
As at 2020-04-01 |
As at 2020-04-01 |
As at 2020-04-01 |
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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 | — | — | — | — | — | — | — |
2,197,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,877,900,000
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 | — | — | — | — | — | — | — |
793,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
710,300,000
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 |
200,000
GBP
|
30,700,000
GBP
|
400,000
GBP
|
38,000,000
GBP
|
117,100,000
GBP
|
23,600,000
GBP
|
1,274,800,000
GBP
|
1,403,100,000
GBP
|
400,000
GBP
|
19,900,000
GBP
|
1,065,800,000
GBP
|
23,600,000
GBP
|
1,167,600,000
GBP
|
600,000
GBP
|
38,000,000
GBP
|
20,900,000
GBP
|
700,000
GBP
|
73,200,000
GBP
|
13,600,000
GBP
|
200,000
GBP
|
200,000
GBP
|
20,900,000
GBP
|
1,065,800,000
GBP
|
13,600,000
GBP
|
1,167,600,000
GBP
|
38,000,000
GBP
|
23,600,000
GBP
|
700,000
GBP
|
600,000
GBP
|
73,200,000
GBP
|
200,000
GBP
|
148,700,000
GBP
|
23,600,000
GBP
|
38,000,000
GBP
|
7,700,000
GBP
|
700,000
GBP
|
14,300,000
GBP
|
949,200,000
GBP
|
1,136,900,000
GBP
|
100,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |