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 |
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 |
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] | ||||||||||||||||||
| Material income and expense [abstract] | ||||||||||||||||||
| Investment income | — |
8,686,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
8,634,000,000
GBP
|
— | — | — | — | — | — |
| Finance income (cost) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other finance income (cost) | — |
5,813,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
6,214,000,000
GBP
|
— | — | — | — | — | — |
| Fee and commission income (expense) [abstract] | ||||||||||||||||||
| Fee and commission income [abstract] | ||||||||||||||||||
| Fee and commission income | — |
1,029,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,003,000,000
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 | — |
16,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
12,000,000
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 | — |
24,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
23,000,000
GBP
|
— | — | — | — | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income |
12,000,000
GBP
|
324,000,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
15,000,000
GBP
|
321,000,000
GBP
|
336,000,000
GBP
|
—
GBP
|
—
GBP
|
201,000,000
GBP
|
—
GBP
|
8,000,000
GBP
|
201,000,000
GBP
|
—
GBP
|
193,000,000
GBP
|
8,000,000
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — |
336,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
193,000,000
GBP
|
— | — | — | — | — | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — |
12,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
8,000,000
GBP
|
— | — | — | — | — | — |