Analysis Of Income And Expense [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|
| Analysis of income and expense [abstract] | ||
| Revenue [abstract] | ||
| Interest income |
6,721,000,000
GBP
|
6,825,000,000
GBP
|
| Material income and expense [abstract] | ||
| Interest expense |
719,000,000
GBP
|
1,015,000,000
GBP
|
| Interest income (expense) |
6,002,000,000
GBP
|
5,810,000,000
GBP
|
| Other operating income (expense) |
1,785,000,000
GBP
|
1,761,000,000
GBP
|
| Operating expense |
6,199,000,000
GBP
|
6,184,000,000
GBP
|
| Fee and commission income (expense) [abstract] | ||
| Fee and commission income [abstract] | ||
| Fee and commission income |
1,862,000,000
GBP
|
1,685,000,000
GBP
|
| Fee and commission expense [abstract] | ||
| Fee and commission expense |
380,000,000
GBP
|
301,000,000
GBP
|
| Expenses by nature [abstract] | ||
| Classes of employee benefits expense [abstract] | ||
| Employee benefits expense |
2,815,000,000
GBP
|
2,823,000,000
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 |
776,000,000
GBP
|
841,000,000
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 |
22,000,000
GBP
|
7,000,000
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 |
158,000,000
GBP
|
35,000,000
GBP
|
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss |
40,000,000
GBP
|
41,000,000
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||
| Comprehensive income |
2,556,000,000
GBP
|
372,000,000
GBP
|
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||
| Comprehensive income, attributable to non-controlling interests |
5,000,000
GBP
|
4,000,000
GBP
|