Profit Or Loss [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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Profit or loss [abstract] | ||||||||||||
| Profit (loss) [abstract] | ||||||||||||
| Employee benefits expense |
3,901,000,000
GBP
|
— | — | — | — |
3,716,000,000
GBP
|
— | — | — | — |
3,676,000,000
GBP
|
— |
| Depreciation and amortisation expense |
934,000,000
GBP
|
— | — | — | — |
833,000,000
GBP
|
— | — | — | — |
923,000,000
GBP
|
— |
| Impairment loss (reversal of impairment loss) recognised in profit or loss |
578,000,000
GBP
|
— | — | — | — |
337,000,000
GBP
|
— | — | — | — |
1,173,000,000
GBP
|
— |
| Profit (loss) before tax |
6,178,000,000
GBP
|
— | — | — | — |
5,132,000,000
GBP
|
— | — | — | — |
3,844,000,000
GBP
|
— |
| Tax expense (income) |
1,434,000,000
GBP
|
— | — | — | — |
1,275,000,000
GBP
|
— | — | — | — |
996,000,000
GBP
|
— |
| Profit (loss) from continuing operations |
4,744,000,000
GBP
|
4,000,000
GBP
|
4,748,000,000
GBP
|
4,748,000,000
GBP
|
3,851,000,000
GBP
|
3,857,000,000
GBP
|
3,851,000,000
GBP
|
6,000,000
GBP
|
44,000,000
GBP
|
2,804,000,000
GBP
|
2,848,000,000
GBP
|
2,804,000,000
GBP
|
| Profit (loss) from discontinued operations |
112,000,000
GBP
|
— |
112,000,000
GBP
|
112,000,000
GBP
|
262,000,000
GBP
|
262,000,000
GBP
|
262,000,000
GBP
|
— | — |
464,000,000
GBP
|
464,000,000
GBP
|
464,000,000
GBP
|
| Profit (loss) |
4,632,000,000
GBP
|
— | — | — | — |
3,595,000,000
GBP
|
— | — | — | — |
3,312,000,000
GBP
|
— |
| Profit (loss), attributable to [abstract] | ||||||||||||
| Profit (loss), attributable to non-controlling interests |
4,000,000
GBP
|
— | — | — | — |
6,000,000
GBP
|
— | — | — | — |
44,000,000
GBP
|
— |
| Earnings per share [text block] | — | — | — | — | — | — | — | — | — | — | — | — |
| Earnings per share [abstract] | ||||||||||||
| Earnings per share [line items] | ||||||||||||
| Basic earnings per share [abstract] | ||||||||||||
| Basic earnings (loss) per share from continuing operations |
0.492
|
— | — | — | — |
0.365
|
— | — | — | — |
0.230
|
— |
| Basic earnings (loss) per share from discontinued operations |
0.012
|
— | — | — | — |
0.027
|
— | — | — | — |
0.043
|
— |
| Basic earnings (loss) per share |
0.479
|
— | — | — | — |
0.338
|
— | — | — | — |
0.273
|
— |
| Diluted earnings per share [abstract] | ||||||||||||
| Diluted earnings (loss) per share from continuing operations |
0.489
|
— | — | — | — |
0.362
|
— | — | — | — |
0.229
|
— |
| Diluted earnings (loss) per share from discontinued operations |
0.012
|
— | — | — | — |
0.026
|
— | — | — | — |
0.043
|
— |
| Diluted earnings (loss) per share |
0.477
|
— | — | — | — |
0.336
|
— | — | — | — |
0.272
|
— |