Statement Of Changes In Net Assets Available For Benefits [Abstract]
| Concept |
2022-01-01 to 2022-12-31 |
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] | ||
| Investment income |
51,600,000
GBP
|
146,300,000
GBP
|
| Other income |
55,300,000
GBP
|
46,700,000
GBP
|
| Tax expense (income) |
5,600,000
GBP
|
102,300,000
GBP
|