Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2022-07-02 |
As at 2022-07-02 |
As at 2022-07-02 |
As at 2022-07-02 |
As at 2022-07-02 |
As at 2022-07-02 |
As at 2022-07-02 |
As at 2021-06-26 |
As at 2021-06-26 |
As at 2021-06-26 |
As at 2021-06-26 |
As at 2021-06-26 |
As at 2021-06-26 |
As at 2021-06-26 |
As at 2020-06-28 |
As at 2020-06-28 |
As at 2020-06-28 |
As at 2020-06-28 |
As at 2020-06-28 |
As at 2020-06-28 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
737,900,000.0
GBP
|
— | — | — | — | — | — |
766,700,000.0
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 |
559,600,000.0
GBP
|
— | — | — | — | — | — |
485,500,000.0
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 | — |
1,700,000.0
GBP
|
2,000,000.0
GBP
|
43,200,000.0
GBP
|
20,200,000.0
GBP
|
111,200,000.0
GBP
|
178,300,000.0
GBP
|
— |
281,200,000.0
GBP
|
238,700,000.0
GBP
|
1,600,000.0
GBP
|
2,000,000.0
GBP
|
4,300,000.0
GBP
|
43,200,000.0
GBP
|
1,600,000.0
GBP
|
2,000,000.0
GBP
|
173,400,000.0
GBP
|
43,200,000.0
GBP
|
121,300,000.0
GBP
|
5,300,000.0
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |