Statement Of Comprehensive Income [Abstract]
| Concept |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
2021-08-01 to 2022-07-31 |
2020-08-01 to 2021-07-31 |
2020-08-01 to 2021-07-31 |
2020-08-01 to 2021-07-31 |
2020-08-01 to 2021-07-31 |
2020-08-01 to 2021-07-31 |
2020-08-01 to 2021-07-31 |
2020-08-01 to 2021-07-31 |
2020-08-01 to 2021-07-31 |
2020-08-01 to 2021-07-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||||
| Profit (loss) |
–
GBP
|
–
GBP
|
165,200,000
GBP
|
–
GBP
|
165,200,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
165,200,000
GBP
|
202,100,000
GBP
|
202,100,000
GBP
|
–
GBP
|
–
GBP
|
202,100,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
| Other comprehensive income [abstract] | ||||||||||||||||||
| Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||
| Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans | — | — |
100,000
GBP
|
— | — | — | — | — | — |
500,000
GBP
|
— | — | — | — | — | — | — | — |
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||
| Exchange differences on translation [abstract] | ||||||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations | — | — |
500,000
GBP
|
— | — | — | — | — | — |
1,100,000
GBP
|
— | — | — | — | — | — | — | — |
| Cash flow hedges [abstract] | ||||||||||||||||||
| Other comprehensive income, before tax, cash flow hedges | — | — |
30,600,000
GBP
|
— | — | — | — | — | — |
7,400,000
GBP
|
— | — | — | — | — | — | — | — |
| Financial assets measured at fair value through other comprehensive income [abstract] | ||||||||||||||||||
| Gains (losses) on financial assets measured at fair value through other comprehensive income, before tax | — | — |
1,100,000
GBP
|
— | — | — | — | — | — |
900,000
GBP
|
— | — | — | — | — | — | — | — |
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract] | ||||||||||||||||||
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss | — | — |
300,000
GBP
|
— | — | — | — | — | — |
600,000
GBP
|
— | — | — | — | — | — | — | — |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract] | ||||||||||||||||||
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — | — |
7,900,000
GBP
|
— | — | — | — | — | — |
1,200,000
GBP
|
— | — | — | — | — | — | — | — |
| Other comprehensive income |
700,000
GBP
|
–
GBP
|
21,300,000
GBP
|
–
GBP
|
200,000
GBP
|
22,000,000
GBP
|
–
GBP
|
200,000
GBP
|
21,300,000
GBP
|
5,900,000
GBP
|
5,900,000
GBP
|
–
GBP
|
–
GBP
|
100,000
GBP
|
–
GBP
|
–
GBP
|
600,000
GBP
|
5,400,000
GBP
|
| Comprehensive income |
700,000
GBP
|
–
GBP
|
186,500,000
GBP
|
–
GBP
|
165,400,000
GBP
|
22,000,000
GBP
|
–
GBP
|
200,000
GBP
|
186,500,000
GBP
|
208,000,000
GBP
|
208,000,000
GBP
|
–
GBP
|
–
GBP
|
202,000,000
GBP
|
–
GBP
|
–
GBP
|
600,000
GBP
|
5,400,000
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — |
186,500,000
GBP
|
— | — | — | — | — | — |
208,000,000
GBP
|
— | — | — | — | — | — | — | — |