Statement Of Comprehensive Income [Abstract]
| Concept |
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 |
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 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||||
| Profit (loss) |
–
GBP
|
561,000,000
GBP
|
–
GBP
|
54 9
GBP
|
–
GBP
|
1,000,000
GBP
|
5 61
GBP
|
11,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
994,000,000
GBP
|
995,000,000
GBP
|
99 4
GBP
|
| Other comprehensive income [abstract] | ||||||||||||||||||
| Other comprehensive income that will not be reclassified to profit or loss, net of tax | — | — | — |
793,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
132,000,000
GBP
|
— |
| Other comprehensive income that will be reclassified to profit or loss, net of tax | — | — | — |
13,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
9,000,000
GBP
|
— |
| Other comprehensive income |
–
GBP
|
780,000,000
GBP
|
41,000,000
GBP
|
780,000,000
GBP
|
–
GBP
|
–
GBP
|
8 21
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
22,000,000
GBP
|
–
GBP
|
141,000,000
GBP
|
141,000,000
GBP
|
119,000,000
GBP
|
| Comprehensive income |
–
GBP
|
1, 341
GBP
|
41,000,000
GBP
|
1, 3 29
GBP
|
–
GBP
|
1,000,000
GBP
|
1, 382
GBP
|
11,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
22,000,000
GBP
|
–
GBP
|
1,135,000,000
GBP
|
1,136,000,000
GBP
|
1,113,000,000
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — |
1, 341
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,135,000,000
GBP
|
— |
| Comprehensive income, attributable to non-controlling interests | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,000,000
GBP
|
— |