Statement Of Cash Flows [Abstract]
| Concept |
As at 2022-04-30 |
2021-05-02 to 2022-04-30 |
2020-05-03 to 2021-05-01 |
As at 2021-05-01 |
|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||
| Cash flows from (used in) operating activities [abstract] | ||||
| Classes of cash payments from operating activities [abstract] | ||||
| Payments to and on behalf of employees | — |
78,000,000
GBP
|
4 7
GBP
|
— |
| Cash flows from (used in) operations | — |
524,000,000
GBP
|
926,000,000
GBP
|
— |
| Income taxes paid (refund), classified as operating activities | — |
1 8
GBP
|
3 5
GBP
|
— |
| Cash flows from (used in) operating activities | — |
4 28
GBP
|
844,000,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | ||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — |
1,000,000
GBP
|
2,000,000
GBP
|
— |
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
2,000,000
GBP
|
1,000,000
GBP
|
— |
| Cash flows from (used in) investing activities | — |
1 3 4
GBP
|
10 3
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | ||||
| Payments of lease liabilities, classified as financing activities | — |
20 8
GBP
|
2 32
GBP
|
— |
| Dividends paid, classified as financing activities | — |
4 6
GBP
|
–
GBP
|
— |
| Interest paid, classified as financing activities | — |
87,000,000
GBP
|
1 0 1
GBP
|
— |
| Cash flows from (used in) financing activities | — |
3 4 0
GBP
|
67 2
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
4 6
GBP
|
69,000,000
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||
| Effect of exchange rate changes on cash and cash equivalents | — |
1,000,000
GBP
|
2 0
GBP
|
— |
| Cash and cash equivalents |
1 26
GBP
|
— | — |
175,000,000
GBP
|