Statement Of Changes In Net Assets Available For Benefits [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
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] | |||
| Tax expense (income) |
517,000,000
GBP
|
499,000,000
GBP
|
197,000,000
GBP
|