Analysis Of Income And Expense [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||
| Interest income | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Interest income on loans and advances to customers | — | — | — | — | — | — | — |
36,600,000
GBP
|
— | — | — |
36,800,000
GBP
|
— | — | — | — | — | — |
| Other revenue | — | — | — | — | — | — | — |
314 . 8
GBP
|
— | — | — |
329 .4
GBP
|
— | — | — | — | — | — |
| Revenue | — | — | — | — | — | — | — |
1,550 .0
GBP
|
— | — | — |
1,3 05.3
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 | — | — | — | — | — | — | — |
1 3 .3
GBP
|
— | — | — |
3 3. 6
GBP
|
— | — | — | — | — | — |
| Finance income (cost) | — | — | — | — | — | — | — |
11 .9
GBP
|
— | — | — |
1 2 . 3
GBP
|
— | — | — | — | — | — |
| Interest expense | — | — | — | — | — | — | — |
6 . 1
GBP
|
— | — | — |
7. 2
GBP
|
— | — | — | — | — | — |
| Operating expense | — | — | — | — | — | — | — |
82 4.6
GBP
|
— | — | — |
684,800,000
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 |
0. 3
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1 0 . 1
GBP
|
1 0 . 1
GBP
|
10 . 4
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
3. 5
GBP
|
3,400,000
GBP
|
100,000
GBP
|
–
GBP
|
–
GBP
|
3,400,000
GBP
|
–
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income |
1 . 5
GBP
|
–
GBP
|
6,600,000
GBP
|
4 8 .7
GBP
|
–
GBP
|
1 0 . 1
GBP
|
9 45 .7
GBP
|
94 4.2
GBP
|
9 97. 9
GBP
|
528,800,000
GBP
|
–
GBP
|
5 6 7.7
GBP
|
3,400,000
GBP
|
0 . 9
GBP
|
–
GBP
|
2 .4
GBP
|
568,600,000
GBP
|
38. 8
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — | — | — |
9 45 .7
GBP
|
— | — | — |
568,600,000
GBP
|
— | — | — | — | — | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — | — | — |
1 . 5
GBP
|
— | — | — |
0 . 9
GBP
|
— | — | — | — | — | — |