Analysis Of Income And Expense [Abstract]
| Concept |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||
| Interest income | — |
897,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
690,000,000
GBP
|
— | — | — |
| Material income and expense [abstract] | ||||||||||||||||||
| Interest expense | — |
304,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
112,000,000
GBP
|
— | — | — |
| Interest income (expense) | — |
592,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
578,000,000
GBP
|
— | — | — |
| Revenue and other operating income | — |
932,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
936,100,000
GBP
|
— | — | — |
| Fee and commission income (expense) [abstract] | ||||||||||||||||||
| Fee and commission income [abstract] | ||||||||||||||||||
| Fee and commission income | — |
262,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
259,500,000
GBP
|
— | — | — |
| Fee and commission expense [abstract] | ||||||||||||||||||
| Fee and commission expense | — |
17,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
17,200,000
GBP
|
— | — | — |
| Trading income (expense) [abstract] | ||||||||||||||||||
| Trading income (expense) | — |
58,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
81,600,000
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 | — |
700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
500,000
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 | — |
1,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
300,000
GBP
|
— | — | — |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — |
4,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
7,900,000
GBP
|
— | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income |
200,000
GBP
|
87,100,000
GBP
|
–
GBP
|
77,000,000
GBP
|
2,800,000
GBP
|
–
GBP
|
87,100,000
GBP
|
–
GBP
|
12,700,000
GBP
|
700,000
GBP
|
–
GBP
|
200,000
GBP
|
–
GBP
|
22,000,000
GBP
|
186,500,000
GBP
|
–
GBP
|
165,400,000
GBP
|
186,500,000
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — |
87,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
186,500,000
GBP
|
— | — | — |