Statement Of Cash Flows [Abstract]
| Concept |
2021-10-01 to 2022-09-30 |
As at 2022-09-30 |
As at 2021-09-30 |
2020-10-01 to 2021-09-30 |
As at 2020-09-30 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operations |
368,000,000
GBP
|
— | — |
476,000,000
GBP
|
— |
| Interest paid, classified as operating activities |
21,000,000
GBP
|
— | — |
19,000,000
GBP
|
— |
| Income taxes paid (refund), classified as operating activities |
62,000,000
GBP
|
— | — |
81,000,000
GBP
|
— |
| Cash flows from (used in) operating activities |
285,000,000
GBP
|
— | — |
376,000,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities |
42,000,000
GBP
|
— | — |
135,000,000
GBP
|
— |
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities |
285,000,000
GBP
|
— | — |
–
GBP
|
— |
| Other cash receipts from sales of equity or debt instruments of other entities, classified as investing activities |
–
GBP
|
— | — |
3,000,000
GBP
|
— |
| Purchase of property, plant and equipment, classified as investing activities |
12,000,000
GBP
|
— | — |
39,000,000
GBP
|
— |
| Purchase of intangible assets, classified as investing activities |
40,000,000
GBP
|
— | — |
17,000,000
GBP
|
— |
| Interest received, classified as investing activities |
1,000,000
GBP
|
— | — |
1,000,000
GBP
|
— |
| Cash flows from (used in) investing activities |
284,000,000
GBP
|
— | — |
62,000,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||
| Payments to acquire or redeem entity's shares |
249,000,000
GBP
|
— | — |
353,000,000
GBP
|
— |
| Payments of other equity instruments |
32,000,000
GBP
|
— | — |
–
GBP
|
— |
| Proceeds from borrowings, classified as financing activities |
51 6
GBP
|
— | — |
344,000,000
GBP
|
— |
| Repayments of borrowings, classified as financing activities |
16 6
GBP
|
— | — |
481,000,000
GBP
|
— |
| Payments of lease liabilities, classified as financing activities |
19,000,000
GBP
|
— | — |
22,000,000
GBP
|
— |
| Cash flows from (used in) financing activities |
127,000,000
GBP
|
— | — |
694,000,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes |
126,000,000
GBP
|
— | — |
256,000,000
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents |
48,000,000
GBP
|
— | — |
25,000,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes |
78,000,000
GBP
|
— | — |
281,000,000
GBP
|
— |
| Cash and cash equivalents | — |
489,000,000
GBP
|
567,000,000
GBP
|
— |
848,000,000
GBP
|