Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2022-12-30 |
As at 2022-12-30 |
As at 2022-12-30 |
As at 2022-12-30 |
As at 2022-12-30 |
As at 2022-12-30 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2020-12-25 |
As at 2020-12-25 |
As at 2020-12-25 |
As at 2020-12-25 |
As at 2020-12-25 |
As at 2020-12-25 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | — | — |
1,592,300,000
GBP
|
— | — | — |
1,892,000,000
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 | — | — |
2,014,500,000
GBP
|
— | — | — |
2,043,100,000
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 |
2,000,000
GBP
|
141,700,000
GBP
|
422,200,000
GBP
|
581,100,000
GBP
|
13,000,000
GBP
|
6,200,000
GBP
|
151,100,000
GBP
|
309,600,000
GBP
|
6,200,000
GBP
|
141,700,000
GBP
|
2,300,000
GBP
|
12,900,000
GBP
|
335,100,000
GBP
|
3,000,000
GBP
|
177,500,000
GBP
|
6,200,000
GBP
|
141,700,000
GBP
|
12,700,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |