Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2025-03-29 |
As at 2025-03-29 |
As at 2025-03-29 |
As at 2025-03-29 |
As at 2025-03-29 |
As at 2025-03-29 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2023-04-01 |
As at 2023-04-01 |
As at 2023-04-01 |
As at 2023-04-01 |
As at 2023-04-01 |
As at 2023-04-01 |
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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 | — |
2,251,700,000
GBP
|
— | — | — | — | — | — | — | — |
2,332,000,000
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 | — |
809,700,000
GBP
|
— | — | — | — | — | — | — | — |
1,005,100,000
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 |
86,900,000
GBP
|
1,442,000,000
GBP
|
351,700,000
GBP
|
9,300,000
GBP
|
1,010,000,000
GBP
|
2,700,000
GBP
|
894,900,000
GBP
|
86,900,000
GBP
|
351,700,000
GBP
|
2,700,000
GBP
|
1,326,900,000
GBP
|
9,300,000
GBP
|
86,800,000
GBP
|
1,406,000,000
GBP
|
9,300,000
GBP
|
2,500,000
GBP
|
974,300,000
GBP
|
351,700,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |