Statement Of Changes In Net Assets Available For Benefits [Abstract]
| Concept |
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 |
|---|---|---|---|---|---|---|
| Statement of changes in net assets available for benefits [abstract] | ||||||
| Reconciliation of changes in net assets available for benefits [abstract] | ||||||
| Changes in net assets available for benefits [abstract] | ||||||
| Administrative expenses |
15,700,000
GBP
|
–
GBP
|
15,700,000
GBP
|
1,200,000
GBP
|
16,200,000
GBP
|
15,000,000
GBP
|
| Other expense, by function |
16,200,000
GBP
|
–
GBP
|
16,200,000
GBP
|
–
GBP
|
14,400,000
GBP
|
14,400,000
GBP
|
| Tax expense (income) |
100,000
GBP
|
–
GBP
|
100,000
GBP
|
42,000,000
GBP
|
28,000,000
GBP
|
14,000,000
GBP
|