Analysis Of Income And Expense [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||
| Revenue [abstract] | ||||||||||||
| Revenue | — |
1 6 5 . 5
GBP
|
— | — | — | — | — |
1 5 5 . 9
GBP
|
— | — | — | — |
| Material income and expense [abstract] | ||||||||||||
| Investment income | — |
52,700,000
GBP
|
— | — | — | — | — |
71 .7
GBP
|
— | — | — | — |
| Other operating income (expense) | — |
133,600,000
GBP
|
— | — | — | — | — |
149,900,000
GBP
|
— | — | — | — |
| Fee and commission income (expense) [abstract] | ||||||||||||
| Fee and commission income [abstract] | ||||||||||||
| Fee and commission income | — |
104,200,000
GBP
|
— | — | — | — | — |
89,400,000
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 |
–
GBP
|
15,300,000
GBP
|
–
GBP
|
–
GBP
|
15,300,000
GBP
|
–
GBP
|
–
GBP
|
7,800,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
7,800,000
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||
| Comprehensive income |
–
GBP
|
1 1 . 0
GBP
|
–
GBP
|
–
GBP
|
14 . 9
GBP
|
3 . 9
GBP
|
–
GBP
|
1 0. 2
GBP
|
–
GBP
|
18 . 6
GBP
|
–
GBP
|
8 . 4
GBP
|