Statement Of Cash Flows [Abstract]
| Concept |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
As at 2021-03-31 |
2020-04-01 to 2021-03-31 |
|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||
| Cash flows from (used in) operating activities [abstract] | ||||
| Income taxes paid (refund), classified as operating activities |
1 07
GBP
|
— | — |
65,000,000
GBP
|
| Cash flows from (used in) operating activities |
605,000,000
GBP
|
— | — |
769,000,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | ||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities |
160,000,000
GBP
|
— | — |
19,000,000
GBP
|
| Purchase of property, plant and equipment, classified as investing activities |
3 58
GBP
|
— | — |
304,000,000
GBP
|
| Purchase of intangible assets, classified as investing activities |
95,000,000
GBP
|
— | — |
77,000,000
GBP
|
| Proceeds from sales of other long-term assets, classified as investing activities |
1,000,000
GBP
|
— | — |
5,000,000
GBP
|
| Interest received, classified as investing activities |
32,000,000
GBP
|
— | — |
66,000,000
GBP
|
| Cash flows from (used in) investing activities |
260,000,000
GBP
|
— | — |
291,000,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||||
| Payments to acquire or redeem entity's shares |
155,000,000
GBP
|
— | — |
–
GBP
|
| Proceeds from borrowings, classified as financing activities |
9,000,000
GBP
|
— | — |
368,000,000
GBP
|
| Repayments of borrowings, classified as financing activities |
140,000,000
GBP
|
— | — |
2 98
GBP
|
| Payments of lease liabilities, classified as financing activities |
14,000,000
GBP
|
— | — |
14,000,000
GBP
|
| Interest paid, classified as financing activities |
111,000,000
GBP
|
— | — |
1 59
GBP
|
| Cash flows from (used in) financing activities |
550,000,000
GBP
|
— | — |
202,000,000
GBP
|
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes |
205,000,000
GBP
|
— | — |
276,000,000
GBP
|
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||
| Effect of exchange rate changes on cash and cash equivalents |
6,000,000
GBP
|
— | — |
4,000,000
GBP
|
| Cash and cash equivalents | — |
391,000,000
GBP
|
581,000,000
GBP
|
— |