Statement Of Cash Flows [Abstract]
| Concept |
As at 2022-04-04 |
2021-04-05 to 2022-04-04 |
2021-04-05 to 2022-04-04 |
2021-04-05 to 2022-04-04 |
2021-04-05 to 2022-04-04 |
2021-04-05 to 2022-04-04 |
2021-04-05 to 2022-04-04 |
2021-04-05 to 2022-04-04 |
2021-04-05 to 2022-04-04 |
2020-04-05 to 2021-04-04 |
2020-04-05 to 2021-04-04 |
2020-04-05 to 2021-04-04 |
2020-04-05 to 2021-04-04 |
2020-04-05 to 2021-04-04 |
2020-04-05 to 2021-04-04 |
2020-04-05 to 2021-04-04 |
2020-04-05 to 2021-04-04 |
As at 2021-04-04 |
As at 2020-04-04 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||||||||
| Profit (loss) | — |
1,252,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
1,252,000,000
GBP
|
-
GBP
|
-
GBP
|
618,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
618,000,000
GBP
|
-
GBP
|
-
GBP
|
— | — |
| Adjustments to reconcile profit (loss) [abstract] | |||||||||||||||||||
| Other adjustments for non-cash items | — | — | — | — | — | — |
524,000,000
GBP
|
— | — | — | — | — | — | — |
1,009,000,000
GBP
|
— | — | — | — |
| Income taxes paid (refund), classified as operating activities | — | — | — | — | — | — |
378,000,000
GBP
|
— | — | — | — | — | — | — |
138,000,000
GBP
|
— | — | — | — |
| Cash flows from (used in) operating activities | — | — | — | — | — | — |
13,772,000,000
GBP
|
— | — | — | — | — | — | — |
11,062,000,000
GBP
|
— | — | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||||||||
| 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 | — | — | — | — | — | — |
20,000,000
GBP
|
— | — | — | — | — | — | — |
23,000,000
GBP
|
— | — | — | — |
| Purchase of property, plant and equipment, classified as investing activities | — | — | — | — | — | — |
68,000,000
GBP
|
— | — | — | — | — | — | — |
96,000,000
GBP
|
— | — | — | — |
| Purchase of intangible assets, classified as investing activities | — | — | — | — | — | — |
210,000,000
GBP
|
— | — | — | — | — | — | — |
245,000,000
GBP
|
— | — | — | — |
| Cash flows from (used in) investing activities | — | — | — | — | — | — |
1,058,000,000
GBP
|
— | — | — | — | — | — | — |
7,505,000,000
GBP
|
— | — | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||||||||
| Proceeds from issuing shares | — | — | — | — | — | — |
-
GBP
|
— | — | — | — | — | — | — |
9,000,000
GBP
|
— | — | — | — |
| Proceeds from issuing other equity instruments | — | — | — | — | — | — |
-
GBP
|
— | — | — | — | — | — | — |
743,000,000
GBP
|
— | — | — | — |
| Payments of lease liabilities, classified as financing activities | — | — | — | — | — | — |
27,000,000
GBP
|
— | — | — | — | — | — | — |
27,000,000
GBP
|
— | — | — | — |
| Cash flows from (used in) financing activities | — | — | — | — | — | — |
389,000,000
GBP
|
— | — | — | — | — | — | — |
271,000,000
GBP
|
— | — | — | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — | — | — | — | — | — |
16,000,000
GBP
|
— | — | — | — | — | — | — |
55,000,000
GBP
|
— | — | — | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — | — | — | — | — | — |
13,119,000,000
GBP
|
— | — | — | — | — | — | — |
3,231,000,000
GBP
|
— | — | — | — |
| Cash and cash equivalents |
30,824,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
17,705,000,000
GBP
|
14,474,000,000
GBP
|