Statement Of Comprehensive Income [Abstract]
| Concept |
2022-04-03 to 2023-04-01 |
2022-04-03 to 2023-04-01 |
2022-04-03 to 2023-04-01 |
2022-04-03 to 2023-04-01 |
2022-04-03 to 2023-04-01 |
2022-04-03 to 2023-04-01 |
2022-04-03 to 2023-04-01 |
2021-03-28 to 2022-04-02 |
2021-03-28 to 2022-04-02 |
2021-03-28 to 2022-04-02 |
2021-03-28 to 2022-04-02 |
2021-03-28 to 2022-04-02 |
2021-03-28 to 2022-04-02 |
2021-03-28 to 2022-04-02 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||
| Profit (loss) |
–
GBP
|
490,000,000
GBP
|
2,000,000
GBP
|
–
GBP
|
492,000,000
GBP
|
4 90
GBP
|
–
GBP
|
3 96
GBP
|
397,000,000
GBP
|
–
GBP
|
–
GBP
|
396,000,000
GBP
|
–
GBP
|
1,000,000
GBP
|
| Other comprehensive income [abstract] | ||||||||||||||
| 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 |
1 4
GBP
|
14,000,000
GBP
|
–
GBP
|
–
GBP
|
14,000,000
GBP
|
–
GBP
|
–
GBP
|
22,000,000
GBP
|
22,000,000
GBP
|
22,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
| Cash flow hedges [abstract] | ||||||||||||||
| Other comprehensive income, before tax, cash flow hedges |
1,000,000
GBP
|
1,000,000
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
–
GBP
|
— |
1,000,000
GBP
|
— | — | — | — | — |
| Other comprehensive income | — | — | — | — |
14,000,000
GBP
|
— | — | — |
21,000,000
GBP
|
— | — | — | — | — |
| Comprehensive income |
14,000,000
GBP
|
504,000,000
GBP
|
2,000,000
GBP
|
–
GBP
|
506,000,000
GBP
|
4 90
GBP
|
–
GBP
|
41 7
GBP
|
418,000,000
GBP
|
21,000,000
GBP
|
–
GBP
|
396,000,000
GBP
|
–
GBP
|
1,000,000
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — |
504,000,000
GBP
|
— | — | — |
417,000,000
GBP
|
— | — | — | — | — |
| Comprehensive income, attributable to non-controlling interests | — | — | — | — |
2,000,000
GBP
|
— | — | — |
1,000,000
GBP
|
— | — | — | — | — |