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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||||||||
| Interest income |
21,026,000,000
GBP
|
— | — | — | — | — | — | — |
12,637,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
9,234,000,000
GBP
|
— |
| Material income and expense [abstract] | ||||||||||||||||||||||||
| Interest expense |
9,977,000,000
GBP
|
— | — | — | — | — | — | — |
2,795,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
1,699,000,000
GBP
|
— |
| Interest income (expense) |
11,049,000,000
GBP
|
— | — | — | — | — | — | — |
9,842,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
7,535,000,000
GBP
|
— |
| Other operating income (expense) |
579,000,000
GBP
|
— | — | — | — | — | — | — |
111,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
451,000,000
GBP
|
— |
| Revenue and other operating income |
14,752,000,000
GBP
|
— | — | — | — | — | — | — |
13,156,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
10,429,000,000
GBP
|
— |
| Operating expense |
7,996,000,000
GBP
|
— | — | — | — | — | — | — |
7,687,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
7,758,000,000
GBP
|
— |
| Fee and commission income (expense) [abstract] | ||||||||||||||||||||||||
| Fee and commission income [abstract] | ||||||||||||||||||||||||
| Fee and commission income |
2,983,000,000
GBP
|
— | — | — | — | — | — | — |
2,915,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
2,694,000,000
GBP
|
— |
| Fee and commission expense [abstract] | ||||||||||||||||||||||||
| Fee and commission expense |
653,000,000
GBP
|
— | — | — | — | — | — | — |
623,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
574,000,000
GBP
|
— |
| Trading income (expense) [abstract] | ||||||||||||||||||||||||
| Trading income (expense) |
794,000,000
GBP
|
— | — | — | — | — | — | — |
1,133,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
323,000,000
GBP
|
— |
| Expenses by nature [abstract] | ||||||||||||||||||||||||
| Classes of employee benefits expense [abstract] | ||||||||||||||||||||||||
| Employee benefits expense |
3,901,000,000
GBP
|
— | — | — | — | — | — | — |
3,716,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
3,676,000,000
GBP
|
— |
| Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract] | ||||||||||||||||||||||||
| Depreciation and amortisation expense [abstract] | ||||||||||||||||||||||||
| Depreciation and amortisation expense |
934,000,000
GBP
|
— | — | — | — | — | — | — |
833,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
923,000,000
GBP
|
— |
| Impairment loss (reversal of impairment loss) recognised in profit or loss |
578,000,000
GBP
|
— | — | — | — | — | — | — |
337,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
1,173,000,000
GBP
|
— |
| Disclosure of attribution of expenses by nature to their function [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of attribution of expenses by nature to their function [abstract] | ||||||||||||||||||||||||
| Disclosure of attribution of expenses by nature to their function [line items] | ||||||||||||||||||||||||
| Miscellaneous other comprehensive income [abstract] | ||||||||||||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations |
619,000,000
GBP
|
— | — | — | — | — | — | — |
241,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
382,000,000
GBP
|
— |
| Income tax relating to components of other comprehensive income [abstract] | ||||||||||||||||||||||||
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss |
79,000,000
GBP
|
— | — | — | — | — | — | — |
187,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
164,000,000
GBP
|
— |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss |
361,000,000
GBP
|
— | — | — | — | — | — | — |
1,067,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
213,000,000
GBP
|
— |
| Income tax relating to components of other comprehensive income |
282,000,000
GBP
|
282,000,000
GBP
|
— |
84,000,000
GBP
|
18,000,000
GBP
|
— |
12,000,000
GBP
|
336,000,000
GBP
|
1,254,000,000
GBP
|
181,000,000
GBP
|
— |
901,000,000
GBP
|
— |
140,000,000
GBP
|
1,254,000,000
GBP
|
32,000,000
GBP
|
— | — |
224,000,000
GBP
|
377,000,000
GBP
|
17,000,000
GBP
|
1,000,000
GBP
|
377,000,000
GBP
|
171,000,000
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||||||||
| Comprehensive income |
4,686,000,000
GBP
|
4,690,000,000
GBP
|
4,000,000
GBP
|
4,402,000,000
GBP
|
637,000,000
GBP
|
-
GBP
|
53,000,000
GBP
|
872,000,000
GBP
|
625,000,000
GBP
|
3,093,000,000
GBP
|
6,000,000
GBP
|
2,376,000,000
GBP
|
-
GBP
|
371,000,000
GBP
|
619,000,000
GBP
|
273,000,000
GBP
|
48,000,000
GBP
|
-
GBP
|
624,000,000
GBP
|
1,626,000,000
GBP
|
403,000,000
GBP
|
91,000,000
GBP
|
1,674,000,000
GBP
|
2,744,000,000
GBP
|
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests |
4,000,000
GBP
|
— | — | — | — | — | — | — |
6,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
48,000,000
GBP
|
— |