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 |
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] | |||||||||||||||||||
| Material income and expense [abstract] | |||||||||||||||||||
| Investment income |
8,634,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
14,009,000,000
GBP
|
— |
| Finance income (cost) |
2,313,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2,297,000,000
GBP
|
— |
| Other finance income (cost) |
6,214,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
18,097,000,000
GBP
|
— |
| Interest income (expense) |
7,279,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
11,351,000,000
GBP
|
— |
| Fee and commission income (expense) [abstract] | |||||||||||||||||||
| Fee and commission income [abstract] | |||||||||||||||||||
| Fee and commission income |
1,003,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,037,000,000
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 |
12,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
20,000,000
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 |
23,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
38,000,000
GBP
|
— |
| Comprehensive income, continuing and discontinued operations [abstract] | |||||||||||||||||||
| Comprehensive income |
201,000,000
GBP
|
—
GBP
|
193,000,000
GBP
|
8,000,000
GBP
|
8,000,000
GBP
|
201,000,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
20,000,000
GBP
|
2,013,000,000
GBP
|
2,046,000,000
GBP
|
13,000,000
GBP
|
2,026,000,000
GBP
|
—
GBP
|
2,013,000,000
GBP
|
—
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | |||||||||||||||||||
| Comprehensive income, attributable to owners of parent |
193,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2,026,000,000
GBP
|
— |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | |||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests |
8,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
13,000,000
GBP
|
— |