Statement Of Cash Flows [Abstract]
| Concept |
As at 2023-03-31 |
2022-04-01 to 2023-03-31 |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||
| Cash flows from (used in) operating activities [abstract] | ||||
| Income taxes paid (refund), classified as operating activities | — |
75,000,000
GBP
|
107,000,000
GBP
|
— |
| Cash flows from (used in) operating activities | — |
291,000,000
GBP
|
605,000,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | ||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — |
187,000,000
GBP
|
160,000,000
GBP
|
— |
| Other cash receipts from sales of interests in joint ventures, classified as investing activities | — |
2,000,000
GBP
|
–
GBP
|
— |
| Purchase of property, plant and equipment, classified as investing activities | — |
253,000,000
GBP
|
358,000,000
GBP
|
— |
| Purchase of intangible assets, classified as investing activities | — |
63,000,000
GBP
|
95,000,000
GBP
|
— |
| Proceeds from sales of other long-term assets, classified as investing activities | — |
8,000,000
GBP
|
1,000,000
GBP
|
— |
| Proceeds from government grants, classified as investing activities | — |
7,000,000
GBP
|
–
GBP
|
— |
| Interest received, classified as investing activities | — |
28,000,000
GBP
|
32,000,000
GBP
|
— |
| Cash flows from (used in) investing activities | — |
101,000,000
GBP
|
260,000,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | ||||
| Payments to acquire or redeem entity's shares | — |
45,000,000
GBP
|
155,000,000
GBP
|
— |
| Proceeds from borrowings, classified as financing activities | — |
672,000,000
GBP
|
9,000,000
GBP
|
— |
| Repayments of borrowings, classified as financing activities | — |
281,000,000
GBP
|
140,000,000
GBP
|
— |
| Payments of lease liabilities, classified as financing activities | — |
14,000,000
GBP
|
14,000,000
GBP
|
— |
| Interest paid, classified as financing activities | — |
94,000,000
GBP
|
111,000,000
GBP
|
— |
| Cash flows from (used in) financing activities | — |
97,000,000
GBP
|
550,000,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
287,000,000
GBP
|
205,000,000
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||
| Effect of exchange rate changes on cash and cash equivalents | — |
4,000,000
GBP
|
6,000,000
GBP
|
— |
| Cash and cash equivalents |
650,000,000
GBP
|
— | — |
391,000,000
GBP
|