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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | |||||||||||||||
| Revenue [abstract] | |||||||||||||||
| Interest income |
12,439,000,000
GBP
|
— | — | — | — |
11,617,000,000
GBP
|
— | — | — | — | — | — |
6,708,000,000
GBP
|
— | — |
| Material income and expense [abstract] | |||||||||||||||
| Interest expense |
8,127,000,000
GBP
|
— | — | — | — |
6,959,000,000
GBP
|
— | — | — | — | — | — |
2,283,000,000
GBP
|
— | — |
| Interest income (expense) |
4,312,000,000
GBP
|
— | — | — | — |
4,658,000,000
GBP
|
— | — | — | — | — | — |
4,425,000,000
GBP
|
— | — |
| Other operating income (expense) |
93,000,000
GBP
|
— | — | — | — |
135,000,000
GBP
|
— | — | — | — | — | — |
201,000,000
GBP
|
— | — |
| Revenue and other operating income |
4,657,000,000
GBP
|
— | — | — | — |
5,096,000,000
GBP
|
— | — | — | — | — | — |
4,956,000,000
GBP
|
— | — |
| Fee and commission income (expense) [abstract] | |||||||||||||||
| Fee and commission income [abstract] | |||||||||||||||
| Fee and commission income |
733,000,000
GBP
|
— | — | — | — |
804,000,000
GBP
|
— | — | — | — | — | — |
839,000,000
GBP
|
— | — |
| Fee and commission expense [abstract] | |||||||||||||||
| Fee and commission expense |
481,000,000
GBP
|
— | — | — | — |
501,000,000
GBP
|
— | — | — | — | — | — |
509,000,000
GBP
|
— | — |
| Fee and commission income (expense) |
252,000,000
GBP
|
— | — | — | — |
303,000,000
GBP
|
— | — | — | — | — | — |
330,000,000
GBP
|
— | — |
| Expenses by nature [abstract] | |||||||||||||||
| Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract] | |||||||||||||||
| Impairment loss (reversal of impairment loss) recognised in profit or loss |
71,000,000
GBP
|
— | — | — | — |
205,000,000
GBP
|
— | — | — | — | — | — |
320,000,000
GBP
|
— | — |
| Comprehensive income, continuing and discontinued operations [abstract] | |||||||||||||||
| Comprehensive income |
690,000,000
GBP
|
31,000,000
GBP
|
11,000,000
GBP
|
670,000,000
GBP
|
690,000,000
GBP
|
1,868,000,000
GBP
|
780,000,000
GBP
|
1,099,000,000
GBP
|
1,868,000,000
GBP
|
11,000,000
GBP
|
1,235,000,000
GBP
|
296,000,000
GBP
|
296,000,000
GBP
|
20,000,000
GBP
|
959,000,000
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | |||||||||||||||
| Comprehensive income, attributable to owners of parent |
690,000,000
GBP
|
— | — | — | — |
1,868,000,000
GBP
|
— | — | — | — | — | — |
296,000,000
GBP
|
— | — |