Analysis Of Income And Expense [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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||||||
| Revenue | — | — | — | — | — | — | — |
6,822,000,000
GBP
|
–
GBP
|
6,822,000,000
GBP
|
— |
8,221,000,000
GBP
|
— |
–
GBP
|
8,221,000,000
GBP
|
— | — | — | — | — | — | — |
| Material income and expense [abstract] | ||||||||||||||||||||||
| Finance income (cost) | — | — | — | — | — | — | — |
103,000,000
GBP
|
–
GBP
|
103,000,000
GBP
|
— |
74,000,000
GBP
|
— |
–
GBP
|
74,000,000
GBP
|
— | — | — | — | — | — | — |
| Operating expense | — | — | — | — | — | — | — |
6,121,000,000
GBP
|
–
GBP
|
6,121,000,000
GBP
|
— |
7,360,000,000
GBP
|
— |
–
GBP
|
7,360,000,000
GBP
|
— | — | — | — | — | — | — |
| Expenses by nature [abstract] | ||||||||||||||||||||||
| Classes of employee benefits expense [abstract] | ||||||||||||||||||||||
| Employee benefits expense | — | — | — | — | — | — | — |
1,000,000
GBP
|
–
GBP
|
1,000,000
GBP
|
— |
1,000,000
GBP
|
— |
–
GBP
|
1,000,000
GBP
|
— | — | — | — | — | — | — |
| Miscellaneous other comprehensive income [abstract] | ||||||||||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||||||||||||
| 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
|
| 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
|
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||||||||||||||||||||||
| Share of profit (loss) of associates and joint ventures accounted for using equity method | — | — | — | — | — | — | — |
2,000,000
GBP
|
–
GBP
|
2,000,000
GBP
|
— |
2,000,000
GBP
|
— |
–
GBP
|
2,000,000
GBP
|
— | — | — | — | — | — | — |
| Income tax relating to components of other comprehensive income [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 | — | — | — | — | — | — | — |
43,000,000
GBP
|
— | — | — |
149,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Income tax relating to components of other comprehensive income |
41,000,000
GBP
|
–
GBP
|
44,000,000
GBP
|
2,000,000
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
44,000,000
GBP
|
— | — |
–
GBP
|
147,000,000
GBP
|
–
GBP
|
— | — |
–
GBP
|
147,000,000
GBP
|
2,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
149,000,000
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||||||
| 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 owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — | — | — |
110,000,000
GBP
|
— | — | — |
132,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — | — | — |
–
GBP
|
— | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |