Statement Of Cash Flows [Abstract]
| Concept |
As at 2025-03-31 |
2024-04-05 to 2025-03-31 |
2023-04-05 to 2024-04-04 |
As at 2024-04-04 |
As at 2023-04-04 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Interest paid, classified as operating activities | — |
10,978,000,000
GBP
|
7,828,000,000
GBP
|
— | — |
| Interest received, classified as operating activities | — |
16,263,000,000
GBP
|
12,963,000,000
GBP
|
— | — |
| Income taxes paid (refund), classified as operating activities | — |
225,000,000
GBP
|
479,000,000
GBP
|
— | — |
| Cash flows from (used in) operating activities | — |
7,914,000,000
GBP
|
2,281,000,000
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — |
-
GBP
|
33,000,000
GBP
|
— | — |
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
7,430,000,000
GBP
|
-
GBP
|
— | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
8,000,000
GBP
|
4,000,000
GBP
|
— | — |
| Purchase of property, plant and equipment, classified as investing activities | — |
98,000,000
GBP
|
85,000,000
GBP
|
— | — |
| Purchase of intangible assets, classified as investing activities | — |
303,000,000
GBP
|
298,000,000
GBP
|
— | — |
| Cash flows from (used in) investing activities | — |
10,773,000,000
GBP
|
792,000,000
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||
| Payments of lease liabilities, classified as financing activities | — |
41,000,000
GBP
|
34,000,000
GBP
|
— | — |
| Cash flows from (used in) financing activities | — |
1,442,000,000
GBP
|
152,000,000
GBP
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents | — |
121,000,000
GBP
|
110,000,000
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
4,180,000,000
GBP
|
1,751,000,000
GBP
|
— | — |
| Cash and cash equivalents |
28,525,000,000
GBP
|
— | — |
24,345,000,000
GBP
|
26,096,000,000
GBP
|