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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | |||||||||||||||||||||||
| Revenue [abstract] | |||||||||||||||||||||||
| Interest income |
17,782,000,000
GBP
|
— | — | — | — | — | — | — |
6,535,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
3,149,000,000
GBP
|
— |
| Material income and expense [abstract] | |||||||||||||||||||||||
| Interest expense |
15,631,000,000
GBP
|
— | — | — | — | — | — | — |
4,631,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,395,000,000
GBP
|
— |
| Interest expense on other financial liabilities |
42,000,000
GBP
|
— | — | — | — | — | — | — |
422,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
659,000,000
GBP
|
— |
| Interest income (expense) |
2,151,000,000
GBP
|
— | — | — | — | — | — | — |
1,904,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,754,000,000
GBP
|
— |
| Other operating income (expense) |
190,000,000
GBP
|
— | — | — | — | — | — | — |
135,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
527,000,000
GBP
|
— |
| Selling, general and administrative expense [abstract] | |||||||||||||||||||||||
| Selling, general and administrative expense |
3,375,000,000
GBP
|
— | — | — | — | — | — | — |
3,425,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
3,265,000,000
GBP
|
— |
| Revenue and other operating income |
7,506,000,000
GBP
|
— | — | — | — | — | — | — |
4,304,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
6,120,000,000
GBP
|
— |
| Operating expense |
5,142,000,000
GBP
|
— | — | — | — | — | — | — |
5,251,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
5,462,000,000
GBP
|
— |
| Fee and commission income (expense) [abstract] | |||||||||||||||||||||||
| Fee and commission income [abstract] | |||||||||||||||||||||||
| Fee and commission income |
2,594,000,000
GBP
|
— | — | — | — | — | — | — |
2,593,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
2,706,000,000
GBP
|
— |
| Fee and commission expense [abstract] | |||||||||||||||||||||||
| Fee and commission expense |
1,365,000,000
GBP
|
— | — | — | — | — | — | — |
1,298,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,293,000,000
GBP
|
— |
| Fee and commission income (expense) |
1,229,000,000
GBP
|
— | — | — | — | — | — | — |
1,295,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,413,000,000
GBP
|
— |
| Trading income (expense) [abstract] | |||||||||||||||||||||||
| Trading income (expense) |
3,395,000,000
GBP
|
— | — | — | — | — | — | — |
2,875,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,733,000,000
GBP
|
— |
| Expenses by nature [abstract] | |||||||||||||||||||||||
| Classes of employee benefits expense [abstract] | |||||||||||||||||||||||
| Employee benefits expense |
1,706,000,000
GBP
|
— | — | — | — | — | — | — |
1,698,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
2,023,000,000
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 |
302,000,000
GBP
|
300,000,000
GBP
|
10,000,000
GBP
|
2,000,000
GBP
|
— |
294,000,000
GBP
|
14,000,000
GBP
|
2,000,000
GBP
|
672,000,000
GBP
|
— |
7,000,000
GBP
|
— | — | — |
665,000,000
GBP
|
665,000,000
GBP
|
8,000,000
GBP
|
— |
595,000,000
GBP
|
595,000,000
GBP
|
— |
603,000,000
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 |
43,000,000
GBP
|
— | — | — | — | — | — | — |
30,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
191,000,000
GBP
|
— |
| Comprehensive income, continuing and discontinued operations [abstract] | |||||||||||||||||||||||
| Comprehensive income |
2,092,000,000
GBP
|
2,070,000,000
GBP
|
288,000,000
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
|
4,000,000
GBP
|
165,000,000
GBP
|
93,000,000
GBP
|
595,000,000
GBP
|
234,000,000
GBP
|
89,000,000
GBP
|
1,087,000,000
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | |||||||||||||||||||||||
| Comprehensive income, attributable to owners of parent |
2,070,000,000
GBP
|
— | — | — | — | — | — | — |
947,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
93,000,000
GBP
|
— |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | |||||||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests |
22,000,000
GBP
|
— | — | — | — | — | — | — |
12,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
4,000,000
GBP
|
— |