Statement Of Changes In Equity [Abstract]
| Concept |
2021-05-02 to 2022-04-30 |
2021-05-02 to 2022-04-30 |
2021-05-02 to 2022-04-30 |
As at 2022-04-30 |
As at 2022-04-30 |
As at 2022-04-30 |
As at 2022-04-30 |
As at 2022-04-30 |
2021-05-02 to 2022-04-30 |
2021-05-02 to 2022-04-30 |
2020-05-03 to 2021-05-01 |
2020-05-03 to 2021-05-01 |
2020-05-03 to 2021-05-01 |
2020-05-03 to 2021-05-01 |
2020-05-03 to 2021-05-01 |
As at 2021-05-01 |
As at 2021-05-01 |
As at 2021-05-01 |
As at 2021-05-01 |
As at 2021-05-01 |
As at 2020-05-02 |
As at 2020-05-02 |
As at 2020-05-02 |
As at 2020-05-02 |
As at 2020-05-02 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||
| Equity | — | — | — |
8 03
GBP
|
1 ,040
GBP
|
2 , 26 3
GBP
|
1,000,000
GBP
|
2, 501
GBP
|
— | — | — | — | — | — | — |
1,000,000
GBP
|
76 4
GBP
|
2 , 26 3
GBP
|
2 , 381
GBP
|
881,000,000
GBP
|
1,000,000
GBP
|
7 75
GBP
|
2 , 26 3
GBP
|
2, 28 0
GBP
|
791,000,000
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||
| Profit (loss) |
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — |
71,000,000
GBP
|
71,000,000
GBP
|
12,000,000
GBP
|
12,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
–
GBP
|
50,000,000
GBP
|
–
GBP
|
— | — | — | — | — |
117,000,000
GBP
|
1 67
GBP
|
57,000,000
GBP
|
43,000,000
GBP
|
–
GBP
|
14,000,000
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
–
GBP
|
5 0
GBP
|
–
GBP
|
— | — | — | — | — |
188,000,000
GBP
|
23 8
GBP
|
69,000,000
GBP
|
55,000,000
GBP
|
–
GBP
|
1 4
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — |
4 6
GBP
|
4 6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
–
GBP
|
24,000,000
GBP
|
–
GBP
|
— | — | — | — | — |
23,000,000
GBP
|
1,000,000
GBP
|
21,000,000
GBP
|
17,000,000
GBP
|
–
GBP
|
4,000,000
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — |