Analysis Of Income And Expense [Abstract]
| Concept |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||
| Revenue | — | — | — | — |
8 , 5 4 5
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1 7, 7 7 2
GBP
|
— |
| Material income and expense [abstract] | ||||||||||||||||||
| Investment income | — | — | — | — |
15,656,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
12 ,9 09
GBP
|
— |
| Fee and commission income (expense) [abstract] | ||||||||||||||||||
| Fee and commission income [abstract] | ||||||||||||||||||
| Fee and commission income | — | — | — | — |
1,037,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
983,000,000
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 | — | — | — | — |
20,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1 3
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 | — | — | — | — |
38,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
81,000,000
GBP
|
— |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income |
—
GBP
|
1,588,000,000
GBP
|
—
GBP
|
20,000,000
GBP
|
1 , 5 7 5
GBP
|
—
GBP
|
1 , 6 0 8
GBP
|
13,000,000
GBP
|
—
GBP
|
9,000,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
1 3
GBP
|
—
GBP
|
120,000,000
GBP
|
129,000,000
GBP
|
13 3
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — |
1, 588
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
120,000,000
GBP
|
— |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — | — | — |
13,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
9,000,000
GBP
|
— |