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] | ||||||||||||||||||
| Revenue | — | — | — | — | — | — | — |
1 7, 7 7 2
GBP
|
— | — | — |
15 , 21 6
GBP
|
— | — | — | — | — | — |
| Material income and expense [abstract] | ||||||||||||||||||
| Investment income | — | — | — | — | — | — | — |
12, 909
GBP
|
— | — | — |
9, 255
GBP
|
— | — | — | — | — | — |
| Fee and commission income (expense) [abstract] | ||||||||||||||||||
| Fee and commission income [abstract] | ||||||||||||||||||
| Fee and commission income | — | — | — | — | — | — | — |
983,000,000
GBP
|
— | — | — |
1,031,000,000
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 3
GBP
|
— | — | — |
3,000,000
GBP
|
— | — | — | — | — | — |
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||||||||||||||||||
| Share of profit (loss) of associates and joint ventures accounted for using equity method | — | — | — | — | — | — | — |
81,000,000
GBP
|
— | — | — |
5 5
GBP
|
— | — | — | — | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income |
9,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1 3
GBP
|
–
GBP
|
120,000,000
GBP
|
129,000,000
GBP
|
133,000,000
GBP
|
1,057,000,000
GBP
|
–
GBP
|
1,06 4
GBP
|
4,000,000
GBP
|
–
GBP
|
1,06 0
GBP
|
–
GBP
|
3,000,000
GBP
|
–
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — | — | — |
120,000,000
GBP
|
— | — | — |
1,06 0
GBP
|
— | — | — | — | — | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — | — | — |
9,000,000
GBP
|
— | — | — |
4,000,000
GBP
|
— | — | — | — | — | — |