Analysis Of Income And Expense [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||||
| Interest income | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Interest income on loans and advances to customers |
94,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
58,700,000
GBP
|
— | — | — | — | — | — | — | — |
| Material income and expense [abstract] | ||||||||||||||||||||
| Impairment loss (reversal of impairment loss) recognised in profit or loss, loans and advances [abstract] | ||||||||||||||||||||
| Impairment loss (reversal of impairment loss) recognised in profit or loss, loans and advances |
31,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
18,900,000
GBP
|
— | — | — | — | — | — | — | — |
| Investment income |
122,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
64,600,000
GBP
|
— | — | — | — | — | — | — | — |
| Finance income (cost) |
20,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
12,000,000
GBP
|
— | — | — | — | — | — | — | — |
| Interest expense |
26,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
12,600,000
GBP
|
— | — | — | — | — | — | — | — |
| Interest income (expense) |
68,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
46,100,000
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 |
3,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
4,300,000
GBP
|
— | — | — | — | — | — | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| Comprehensive income |
350,500,000
GBP
|
69,200,000
GBP
|
351,300,000
GBP
|
800,000
GBP
|
338,000,000
GBP
|
–
GBP
|
3,700,000
GBP
|
–
GBP
|
92,400,000
GBP
|
13,600,000
GBP
|
–
GBP
|
211,500,000
GBP
|
286,500,000
GBP
|
1,100,000
GBP
|
18,100,000
GBP
|
155,000,000
GBP
|
242,600,000
GBP
|
212,600,000
GBP
|
–
GBP
|
4,400,000
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| Comprehensive income, attributable to owners of parent |
351,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
212,600,000
GBP
|
— | — | — | — | — | — | — | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests |
800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,100,000
GBP
|
— | — | — | — | — | — | — | — |