Statement Of Changes In Equity [Abstract]
| Concept |
2021-06-27 to 2022-07-02 |
2021-06-27 to 2022-07-02 |
2021-06-27 to 2022-07-02 |
2021-06-27 to 2022-07-02 |
2021-06-27 to 2022-07-02 |
2021-06-27 to 2022-07-02 |
2021-06-27 to 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 |
2020-06-28 to 2021-06-26 |
2020-06-28 to 2021-06-26 |
2020-06-28 to 2021-06-26 |
2020-06-28 to 2021-06-26 |
2020-06-28 to 2021-06-26 |
2020-06-28 to 2021-06-26 |
2020-06-28 to 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||
| Equity | — | — | — | — | — | — | — |
1,700,000.0
GBP
|
2,000,000.0
GBP
|
20,200,000.0
GBP
|
43,200,000.0
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
|
43,200,000.0
GBP
|
121,300,000.0
GBP
|
5,300,000.0
GBP
|
173,400,000.0
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||
| Profit (loss) |
171,200,000.0
GBP
|
—
GBP
|
—
GBP
|
171,200,000.0
GBP
|
—
GBP
|
—
GBP
|
171,200,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
128,900,000.0
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
128,900,000.0
GBP
|
—
GBP
|
128,900,000.0
GBP
|
— | — | — | — | — | — |
| Other comprehensive income |
27,100,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
15,500,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
198,300,000.0
GBP
|
—
GBP
|
—
GBP
|
171,200,000.0
GBP
|
27,100,000.0
GBP
|
—
GBP
|
198,300,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
113,400,000.0
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
128,900,000.0
GBP
|
15,500,000.0
GBP
|
113,400,000.0
GBP
|
— | — | — | — | — | — |
| Dividends recognised as distributions to owners | — |
—
GBP
|
—
GBP
|
282,100,000.0
GBP
|
—
GBP
|
—
GBP
|
282,100,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
—
GBP
|
24,300,000.0
GBP
|
—
GBP
|
24,300,000.0
GBP
|
— | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — |
—
GBP
|
—
GBP
|
3,900,000.0
GBP
|
—
GBP
|
—
GBP
|
3,900,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
—
GBP
|
1,800,000.0
GBP
|
—
GBP
|
1,800,000.0
GBP
|
— | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
—
GBP
|
—
GBP
|
4,800,000.0
GBP
|
—
GBP
|
—
GBP
|
4,800,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
—
GBP
|
7,500,000.0
GBP
|
—
GBP
|
7,500,000.0
GBP
|
— | — | — | — | — | — |
| Amount removed from reserve of cash flow hedges and included in initial cost or other carrying amount of non-financial asset (liability) or firm commitment for which fair value hedge accounting is applied | — |
—
GBP
|
—
GBP
|
—
GBP
|
2,600,000.0
GBP
|
—
GBP
|
2,600,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
5,900,000.0
GBP
|
5,900,000.0
GBP
|
— | — | — | — | — | — |
| Increase (decrease) in equity | — |
—
GBP
|
100,000.0
GBP
|
298,700,000.0
GBP
|
2,600,000.0
GBP
|
—
GBP
|
301,200,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
—
GBP
|
—
GBP
|
—
GBP
|
11,500,000.0
GBP
|
5,900,000.0
GBP
|
5,600,000.0
GBP
|
— | — | — | — | — | — |