Disclosure Of Financial Instruments [Text Block]
| Concept |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
2019-01-01 to 2019-12-31 |
|---|---|---|---|
| Disclosure of financial instruments [text block] | — | — | — |
| Disclosure of financial assets [text block] | — | — | — |
| Disclosure of financial assets [abstract] | |||
| Disclosure of financial assets [line items] | |||
| Impairment loss on financial assets |
233,000,000
GBP
|
638,000,000
GBP
|
199,000,000
GBP
|
| Income, expense, gains or losses of financial instruments [abstract] | |||
| Gains (losses) on financial instruments [abstract] | |||
| Other comprehensive income, before tax, financial assets measured at fair value through other comprehensive income | — | — | — |
| Gains (losses) on financial assets measured at fair value through other comprehensive income, before tax |
111,000,000
GBP
|
114,000,000
GBP
|
147,000,000
GBP
|
| Reclassification adjustments on financial assets measured at fair value through other comprehensive income, before tax |
110,000,000
GBP
|
107,000,000
GBP
|
147,000,000
GBP
|