Profit Or Loss [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|
| Profit or loss [abstract] | ||||||
| Profit (loss) [abstract] | ||||||
| Employee benefits expense | — |
2,815,000,000
GBP
|
— | — |
2,823,000,000
GBP
|
— |
| Depreciation and amortisation expense | — |
776,000,000
GBP
|
— | — |
841,000,000
GBP
|
— |
| Impairment loss (impairment gain and reversal of impairment loss) determined in accordance with IFRS 9 | — |
813,000,000
GBP
|
— | — |
2,169,000,000
GBP
|
— |
| Profit (loss) before tax | — |
3,883,000,000
GBP
|
— | — |
602,000,000
GBP
|
— |
| Tax expense (income) | — |
976,000,000
GBP
|
— | — |
66,000,000
GBP
|
— |
| Profit (loss) | — |
2,907,000,000
GBP
|
— | — |
536,000,000
GBP
|
— |
| Profit (loss), attributable to [abstract] | ||||||
| Profit (loss), attributable to owners of parent | — | — |
2,902,000,000
GBP
|
532,000,000
GBP
|
— | — |
| Profit (loss), attributable to non-controlling interests |
5,000,000
GBP
|
5,000,000
GBP
|
— | — |
4,000,000
GBP
|
4,000,000
GBP
|