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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||||||||
| Interest income | — | — | — | — | — |
19,414,000,000
GBP
|
— | — |
17,782,000,000
GBP
|
— | — | — | — | — | — | — |
6,535,000,000
GBP
|
— | — | — | — | — | — | — |
| Material income and expense [abstract] | ||||||||||||||||||||||||
| Interest expense | — | — | — | — | — |
18,429,000,000
GBP
|
— | — |
15,631,000,000
GBP
|
— | — | — | — | — | — | — |
4,631,000,000
GBP
|
— | — | — | — | — | — | — |
| Interest expense on other financial liabilities | — | — | — | — | — |
9,000,000
GBP
|
— | — |
42,000,000
GBP
|
— | — | — | — | — | — | — |
422,000,000
GBP
|
— | — | — | — | — | — | — |
| Interest income (expense) | — | — | — | — | — |
985,000,000
GBP
|
— | — |
2,151,000,000
GBP
|
— | — | — | — | — | — | — |
1,904,000,000
GBP
|
— | — | — | — | — | — | — |
| Other operating income (expense) | — | — | — | — | — |
106,000,000
GBP
|
— | — |
190,000,000
GBP
|
— | — | — | — | — | — | — |
135,000,000
GBP
|
— | — | — | — | — | — | — |
| Selling, general and administrative expense [abstract] | ||||||||||||||||||||||||
| Selling, general and administrative expense | — | — | — | — | — |
3,440,000,000
GBP
|
— | — |
3,375,000,000
GBP
|
— | — | — | — | — | — | — |
3,425,000,000
GBP
|
— | — | — | — | — | — | — |
| Revenue and other operating income | — | — | — | — | — |
7,473,000,000
GBP
|
— | — |
7,506,000,000
GBP
|
— | — | — | — | — | — | — |
4,304,000,000
GBP
|
— | — | — | — | — | — | — |
| Operating expense | — | — | — | — | — |
5,260,000,000
GBP
|
— | — |
5,142,000,000
GBP
|
— | — | — | — | — | — | — |
5,251,000,000
GBP
|
— | — | — | — | — | — | — |
| Fee and commission income (expense) [abstract] | ||||||||||||||||||||||||
| Fee and commission income [abstract] | ||||||||||||||||||||||||
| Fee and commission income | — | — | — | — | — |
2,758,000,000
GBP
|
— | — |
2,594,000,000
GBP
|
— | — | — | — | — | — | — |
2,593,000,000
GBP
|
— | — | — | — | — | — | — |
| Fee and commission expense [abstract] | ||||||||||||||||||||||||
| Fee and commission expense | — | — | — | — | — |
1,483,000,000
GBP
|
— | — |
1,365,000,000
GBP
|
— | — | — | — | — | — | — |
1,298,000,000
GBP
|
— | — | — | — | — | — | — |
| Fee and commission income (expense) | — | — | — | — | — |
1,275,000,000
GBP
|
— | — |
1,229,000,000
GBP
|
— | — | — | — | — | — | — |
1,295,000,000
GBP
|
— | — | — | — | — | — | — |
| Trading income (expense) [abstract] | ||||||||||||||||||||||||
| Trading income (expense) | — | — | — | — | — |
4,726,000,000
GBP
|
— | — |
3,395,000,000
GBP
|
— | — | — | — | — | — | — |
2,875,000,000
GBP
|
— | — | — | — | — | — | — |
| Expenses by nature [abstract] | ||||||||||||||||||||||||
| Classes of employee benefits expense [abstract] | ||||||||||||||||||||||||
| Employee benefits expense | — | — | — | — | — |
1,672,000,000
GBP
|
— | — |
1,706,000,000
GBP
|
— | — | — | — | — | — | — |
1,698,000,000
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 | — | — | — | — | — |
491,000,000
GBP
|
— | — |
302,000,000
GBP
|
— | — | — | — | — | — | — |
672,000,000
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 | — | — | — | — | — |
18,000,000
GBP
|
— | — |
43,000,000
GBP
|
— | — | — | — | — | — | — |
30,000,000
GBP
|
— | — | — | — | — | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||||||||
| Comprehensive income |
136,000,000
GBP
|
863,000,000
GBP
|
493,000,000
GBP
|
1,213,000,000
GBP
|
24,000,000
GBP
|
887,000,000
GBP
|
103,000,000
GBP
|
176,000,000
GBP
|
2,092,000,000
GBP
|
288,000,000
GBP
|
2,070,000,000
GBP
|
22,000,000
GBP
|
1,569,000,000
GBP
|
294,000,000
GBP
|
422,000,000
GBP
|
661,000,000
GBP
|
935,000,000
GBP
|
196,000,000
GBP
|
12,000,000
GBP
|
943,000,000
GBP
|
1,408,000,000
GBP
|
1,881,000,000
GBP
|
947,000,000
GBP
|
665,000,000
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — |
863,000,000
GBP
|
— | — |
2,070,000,000
GBP
|
— | — | — | — | — | — | — |
947,000,000
GBP
|
— | — | — | — | — | — | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — |
24,000,000
GBP
|
— | — |
22,000,000
GBP
|
— | — | — | — | — | — | — |
12,000,000
GBP
|
— | — | — | — | — | — | — |