Statement Of Cash Flows [Abstract]
| Concept |
2022-09-18 to 2023-09-16 |
2022-09-18 to 2023-09-16 |
2022-09-18 to 2023-09-16 |
2022-09-18 to 2023-09-16 |
As at 2023-09-16 |
2022-09-18 to 2023-09-16 |
2022-09-18 to 2023-09-16 |
2022-09-18 to 2023-09-16 |
2022-09-18 to 2023-09-16 |
2021-09-19 to 2022-09-17 |
2021-09-19 to 2022-09-17 |
As at 2022-09-17 |
2021-09-19 to 2022-09-17 |
2021-09-19 to 2022-09-17 |
2021-09-19 to 2022-09-17 |
2021-09-19 to 2022-09-17 |
2021-09-19 to 2022-09-17 |
2021-09-19 to 2022-09-17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||||||||||
| Profit (loss) |
1,044,000,000
GBP
|
1,044,000,000
GBP
|
24,000,000
GBP
|
1,068,000,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— |
700,000,000
GBP
|
700,000,000
GBP
|
20,000,000
GBP
|
720,000,000
GBP
|
–
GBP
|
–
GBP
|
| Adjustments to reconcile profit (loss) [abstract] | ||||||||||||||||||
| Adjustments for finance costs | — | — | — |
128,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
111,000,000
GBP
|
— | — |
| Adjustments for decrease (increase) in inventories | — | — | — |
94,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
953,000,000
GBP
|
— | — |
| Adjustments for provisions | — | — | — |
27,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
7,000,000
GBP
|
— | — |
| Adjustments for share-based payments | — | — | — |
18,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
19,000,000
GBP
|
— | — |
| Adjustments for losses (gains) on disposal of non-current assets | — | — | — |
28,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
7,000,000
GBP
|
— | — |
| Cash flows from (used in) operations | — | — | — |
1,995,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1,457,000,000
GBP
|
— | — |
| Income taxes paid (refund), classified as operating activities | — | — | — |
341,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
304,000,000
GBP
|
— | — |
| Cash flows from (used in) operating activities | — | — | — |
1,654,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1,153,000,000
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | ||||||||||||||||||
| Proceeds from sales of property, plant and equipment, classified as investing activities | — | — | — |
48,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
30,000,000
GBP
|
— | — |
| Purchase of property, plant and equipment, classified as investing activities | — | — | — |
997,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
680,000,000
GBP
|
— | — |
| Purchase of intangible assets, classified as investing activities | — | — | — |
76,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
89,000,000
GBP
|
— | — |
| Interest received, classified as investing activities | — | — | — |
44,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
17,000,000
GBP
|
— | — |
| Cash flows from (used in) investing activities | — | — | — |
906,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
744,000,000
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | ||||||||||||||||||
| Payments to acquire or redeem entity's shares | — | — | — |
448,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — |
| Payments of lease liabilities, classified as financing activities | — | — | — |
308,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
321,000,000
GBP
|
— | — |
| Interest paid, classified as financing activities | — | — | — |
118,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
114,000,000
GBP
|
— | — |
| Cash flows from (used in) financing activities | — | — | — |
1,282,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
677,000,000
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — | — | — |
534,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
268,000,000
GBP
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — | — | — |
73,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
74,000,000
GBP
|
— | — |
| Cash and cash equivalents | — | — | — | — |
1,457,000,000
GBP
|
— | — | — | — | — | — |
2,121,000,000
GBP
|
— | — | — | — | — | — |