Statement Of Comprehensive Income [Abstract]
| Concept |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2023-05-01 to 2024-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||||||||
| Profit (loss) |
–
GBP
|
–
GBP
|
385,000,000
GBP
|
–
GBP
|
–
GBP
|
385,000,000
GBP
|
–
GBP
|
385,000,000
GBP
|
2,000,000
GBP
|
383,000,000
GBP
|
–
GBP
|
503,000,000
GBP
|
–
GBP
|
1,000,000
GBP
|
504,000,000
GBP
|
–
GBP
|
502,000,000
GBP
|
502,000,000
GBP
|
–
GBP
|
1,000,000
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 |
–
GBP
|
–
GBP
|
2,000,000
GBP
|
–
GBP
|
–
GBP
|
2,000,000
GBP
|
–
GBP
|
2,000,000
GBP
|
— | — |
–
GBP
|
11,000,000
GBP
|
–
GBP
|
— | — |
–
GBP
|
11,000,000
GBP
|
11,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||||||
| Exchange differences on translation [abstract] | ||||||||||||||||||||||
| Reclassification adjustments on exchange differences on translation of foreign operations, before tax | — | — | — | — | — | — | — |
–
GBP
|
— | — | — |
3,000,000
GBP
|
–
GBP
|
— | — |
–
GBP
|
3,000,000
GBP
|
3,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
| Other comprehensive income, before tax, exchange differences on translation of foreign operations |
–
GBP
|
–
GBP
|
147,000,000
GBP
|
147,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
147,000,000
GBP
|
— | — |
–
GBP
|
194,000,000
GBP
|
–
GBP
|
— | — |
–
GBP
|
194,000,000
GBP
|
–
GBP
|
194,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
| Cash flow hedges [abstract] | ||||||||||||||||||||||
| Reclassification adjustments on cash flow hedges, before tax |
25,000,000
GBP
|
–
GBP
|
25,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
25,000,000
GBP
|
— | — |
–
GBP
|
573,000,000
GBP
|
–
GBP
|
— | — |
–
GBP
|
573,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
573,000,000
GBP
|
| Other comprehensive income, before tax, cash flow hedges |
236,000,000
GBP
|
–
GBP
|
236,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
236,000,000
GBP
|
— | — |
–
GBP
|
72,000,000
GBP
|
–
GBP
|
— | — |
–
GBP
|
72,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
72,000,000
GBP
|
| Hedges of net investment in foreign operations [abstract] | ||||||||||||||||||||||
| Other comprehensive income, before tax, hedges of net investments in foreign operations |
–
GBP
|
–
GBP
|
41,000,000
GBP
|
41,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
41,000,000
GBP
|
— | — |
–
GBP
|
74,000,000
GBP
|
–
GBP
|
— | — |
–
GBP
|
74,000,000
GBP
|
–
GBP
|
74,000,000
GBP
|
–
GBP
|
–
GBP
|
–
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 | — | — | — | — | — | — | — |
1,000,000
GBP
|
— | — | — |
2,000,000
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 | — | — | — | — | — | — | — |
43,000,000
GBP
|
— | — | — |
149,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — |
275,000,000
GBP
|
— | — | — |
370,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
170,000,000
GBP
|
–
GBP
|
110,000,000
GBP
|
104,000,000
GBP
|
–
GBP
|
384,000,000
GBP
|
–
GBP
|
110,000,000
GBP
|
— | — |
–
GBP
|
133,000,000
GBP
|
–
GBP
|
— | — |
–
GBP
|
132,000,000
GBP
|
508,000,000
GBP
|
120,000,000
GBP
|
1,000,000
GBP
|
–
GBP
|
496,000,000
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — | — | — |
110,000,000
GBP
|
— | — | — |
132,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — | — | — |
–
GBP
|
— | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |