Statement Of Changes In Net Assets Available For Benefits [Abstract]
| Concept |
2022-09-01 to 2023-09-03 |
2022-09-01 to 2023-09-03 |
2022-09-01 to 2023-09-03 |
2021-09-01 to 2022-08-31 |
2021-09-01 to 2022-08-31 |
2021-09-01 to 2022-08-31 |
|---|---|---|---|---|---|---|
| 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] | ||||||
| Other income |
2 .0
GBP
|
–
GBP
|
2,000,000
GBP
|
2 0.6
GBP
|
–
GBP
|
20 .6
GBP
|
| Administrative expenses |
1, 2 7 9 . 8
GBP
|
11 5 .1
GBP
|
1,164,700,000
GBP
|
1, 2 2 4 . 2
GBP
|
53,900,000
GBP
|
1 ,17 0 . 3
GBP
|
| Tax expense (income) |
73,600,000
GBP
|
56,200,000
GBP
|
17. 4
GBP
|
1 .1
GBP
|
6,400,000
GBP
|
5 . 3
GBP
|