Analysis Of Income And Expense [Abstract]
| Concept |
2023-08-01 to 2024-07-31 |
2023-08-01 to 2024-07-31 |
2023-08-01 to 2024-07-31 |
2023-08-01 to 2024-07-31 |
2023-08-01 to 2024-07-31 |
2023-08-01 to 2024-07-31 |
2023-08-01 to 2024-07-31 |
2023-08-01 to 2024-07-31 |
2023-08-01 to 2024-07-31 |
2023-08-01 to 2024-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
2022-08-01 to 2023-07-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||||
| Interest income | — | — |
–
GBP
|
— |
26,000,000
GBP
|
26,000,000
GBP
|
— | — | — | — | — |
–
GBP
|
36,000,000
GBP
|
— | — | — |
36,000,000
GBP
|
— | — | — |
| Revenue | — | — |
–
GBP
|
— |
3,132,000,000
GBP
|
3,132,000,000
GBP
|
— | — | — | — | — |
–
GBP
|
3,037,000,000
GBP
|
— | — | — |
3,037,000,000
GBP
|
— | — | — |
| Material income and expense [abstract] | ||||||||||||||||||||
| Finance income (cost) | — | — |
5,000,000
GBP
|
— |
38,000,000
GBP
|
43,000,000
GBP
|
— | — | — | — | — |
8,000,000
GBP
|
35,000,000
GBP
|
— | — | — |
43,000,000
GBP
|
— | — | — |
| Other finance income (cost) | — | — |
11,000,000
GBP
|
— |
–
GBP
|
11,000,000
GBP
|
— | — | — | — | — |
8,000,000
GBP
|
–
GBP
|
— | — | — |
8,000,000
GBP
|
— | — | — |
| Other finance income | — | — |
6,000,000
GBP
|
— |
–
GBP
|
6,000,000
GBP
|
— | — | — | — | — |
7,000,000
GBP
|
–
GBP
|
— | — | — |
7,000,000
GBP
|
— | — | — |
| Interest expense | — | — |
–
GBP
|
— |
64,000,000
GBP
|
64,000,000
GBP
|
— | — | — | — | — |
7,000,000
GBP
|
71,000,000
GBP
|
— | — | — |
78,000,000
GBP
|
— | — | — |
| Operating expense | — | — |
111,000,000
GBP
|
— |
2,606,000,000
GBP
|
2,717,000,000
GBP
|
— | — | — | — | — |
98,000,000
GBP
|
2,536,000,000
GBP
|
— | — | — |
2,634,000,000
GBP
|
— | — | — |
| Miscellaneous other comprehensive income [abstract] | ||||||||||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations |
1,000,000
GBP
|
–
GBP
|
— |
–
GBP
|
— |
33,000,000
GBP
|
33,000,000
GBP
|
32,000,000
GBP
|
1,000,000
GBP
|
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
2,000,000
GBP
|
99,000,000
GBP
|
101,000,000
GBP
|
101,000,000
GBP
|
2,000,000
GBP
|
–
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| Comprehensive income |
97,000,000
GBP
|
4,000,000
GBP
|
— |
–
GBP
|
— |
68,000,000
GBP
|
33,000,000
GBP
|
68,000,000
GBP
|
–
GBP
|
–
GBP
|
14,000,000
GBP
|
— | — |
–
GBP
|
133,000,000
GBP
|
46,000,000
GBP
|
45,000,000
GBP
|
101,000,000
GBP
|
1,000,000
GBP
|
–
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — |
68,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
46,000,000
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
|
— | — | — |