Statement Of Cash Flows [Abstract]
| Concept |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
As at 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
2022-04-05 to 2023-04-04 |
2022-04-05 to 2023-04-04 |
2022-04-05 to 2023-04-04 |
2022-04-05 to 2023-04-04 |
2022-04-05 to 2023-04-04 |
2022-04-05 to 2023-04-04 |
2022-04-05 to 2023-04-04 |
2022-04-05 to 2023-04-04 |
As at 2023-04-04 |
As at 2022-04-04 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||||||||
| Profit (loss) |
-
GBP
|
-
GBP
|
1,300,000,000
GBP
|
— |
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
1,300,000,000
GBP
|
1,664,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
1,664,000,000
GBP
|
-
GBP
|
-
GBP
|
— | — |
| Adjustments to reconcile profit (loss) [abstract] | |||||||||||||||||||
| Other adjustments for non-cash items | — | — |
965,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
839,000,000
GBP
|
— | — | — | — |
| Income taxes paid (refund), classified as operating activities | — | — |
479,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
558,000,000
GBP
|
— | — | — | — |
| Cash flows from (used in) operating activities | — | — |
1,994,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
455,000,000
GBP
|
— | — | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||||||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — | — |
33,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
-
GBP
|
— | — | — | — |
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — | — |
-
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
-
GBP
|
— | — | — | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — | — |
4,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
21,000,000
GBP
|
— | — | — | — |
| Purchase of property, plant and equipment, classified as investing activities | — | — |
85,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
63,000,000
GBP
|
— | — | — | — |
| Purchase of intangible assets, classified as investing activities | — | — |
298,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
283,000,000
GBP
|
— | — | — | — |
| Cash flows from (used in) investing activities | — | — |
792,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
2,267,000,000
GBP
|
— | — | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||||||||
| Payments to acquire or redeem entity's shares | — | — |
76,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
101,000,000
GBP
|
— | — | — | — |
| Payments of lease liabilities, classified as financing activities | — | — |
34,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
33,000,000
GBP
|
— | — | — | — |
| Cash flows from (used in) financing activities | — | — |
152,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
2,137,000,000
GBP
|
— | — | — | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — | — |
110,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
10,000,000
GBP
|
— | — | — | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — | — |
1,464,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
4,869,000,000
GBP
|
— | — | — | — |
| Cash and cash equivalents | — | — | — |
24,491,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
25,955,000,000
GBP
|
30,824,000,000
GBP
|