Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2022-04-30 |
As at 2022-04-30 |
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As at 2021-05-01 |
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As at 2021-04-30 |
As at 2021-04-30 |
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As at 2020-05-01 |
As at 2020-05-01 |
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As at 2020-05-01 |
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As at 2020-05-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | — | — | — | — |
6,587 .7
GBP
|
— | — | — | — | — | — | — | — |
5,552,200,000
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 | — | — | — | — |
3,451,600,000
GBP
|
— | — | — | — | — | — | — | — |
2,37 6.8
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 |
4,016. 1
GBP
|
49,800,000
GBP
|
6,500,000
GBP
|
25,000,000
GBP
|
3, 136. 1
GBP
|
961,300,000
GBP
|
49,800,000
GBP
|
24,900,000
GBP
|
6,600,000
GBP
|
961,300,000
GBP
|
3, 175.4
GBP
|
4,055,400,000
GBP
|
961,300,000
GBP
|
3, 175.4
GBP
|
49,800,000
GBP
|
4,055,400,000
GBP
|
6,600,000
GBP
|
2 4.9
GBP
|
3,981,600,000
GBP
|
3, 101.6
GBP
|
961,300,000
GBP
|
6,800,000
GBP
|
24. 7
GBP
|
49,800,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |