Statement Of Changes In Net Assets Available For Benefits [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 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|---|
| 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 |
300,000
GBP
|
355,700,000
GBP
|
356,000,000
GBP
|
359,600,000
GBP
|
60,600,000
GBP
|
298,500,000
GBP
|
500,000
GBP
|
| Tax expense (income) |
–
GBP
|
14,700,000
GBP
|
14. 7
GBP
|
9,400,000
GBP
|
–
GBP
|
9,500,000
GBP
|
100,000
GBP
|