Statement Of Changes In Net Assets Available For Benefits [Abstract]
| Concept |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2022-05-01 to 2023-04-30 |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
|---|---|---|---|---|---|---|
| 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) |
3,000,000
GBP
|
172,000,000
GBP
|
169,000,000
GBP
|
98,000,000
GBP
|
2,000,000
GBP
|
100,000,000
GBP
|