Statement Of Financial Position [Abstract]
| Concept |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2023-09-30 |
As at 2022-10-01 |
As at 2022-10-01 |
As at 2022-10-01 |
As at 2022-10-01 |
As at 2022-10-01 |
As at 2022-10-01 |
As at 2022-10-01 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2022-09-30 |
As at 2021-10-01 |
As at 2021-10-01 |
As at 2021-10-01 |
As at 2021-10-01 |
As at 2021-10-01 |
As at 2021-10-01 |
As at 2021-10-01 |
As at 2021-10-01 |
As at 2021-10-01 |
As at 2021-10-01 |
As at 2021-10-01 |
As at 2021-10-01 |
As at 2021-10-01 |
As at 2021-10-01 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
As at 2021-09-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Property, plant and equipment | — | — | — | — | — | — |
1,617,000,000
GBP
|
— | — | — | — | — | — | — | — |
1,659,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets | — | — | — | — | — | — |
326,000,000
GBP
|
— | — | — | — | — | — | — | — |
228,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Investments accounted for using equity method | — | — | — | — | — | — |
55,000,000
GBP
|
— | — | — | — | — | — | — | — |
56,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other non-current receivables | — | — | — | — | — | — |
63,000,000
GBP
|
— | — | — | — | — | — | — | — |
67,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — | — | — | — |
653,000,000
GBP
|
— | — | — | — | — | — | — | — |
439,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets | — | — | — | — | — | — |
20,896,000,000
GBP
|
— | — | — | — | — | — | — | — |
22,037,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Current inventories | — | — | — | — | — | — |
4,522,000,000
GBP
|
— | — | — | — | — | — | — | — |
4,140,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current receivables | — | — | — | — | — | — |
2,490,000,000
GBP
|
— | — | — | — | — | — | — | — |
2,543,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — | — | — |
1,345,000,000
GBP
|
— | — | — | — | — | — | — | — |
1,850,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,287,000,000
GBP
|
— | — |
| Current assets | — | — | — | — | — | — |
8,595,000,000
GBP
|
— | — | — | — | — | — | — | — |
8,921,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets | — | — | — | — | — | — |
29,491,000,000
GBP
|
— | — | — | — | — | — | — | — |
30,958,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Issued capital | — | — | — | — | — | — |
97,000,000
GBP
|
— | — | — | — | — | — | — | — |
103,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — | — | — | — |
674,000,000
GBP
|
— | — | — | — | — | — | — | — |
443,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — | — | — | — | — |
6,021,000,000
GBP
|
— | — | — | — | — | — | — | — |
6,860,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests | — | — | — | — | — | — |
621,000,000
GBP
|
— | — | — | — | — | — | — | — |
613,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
5,843,000,000
GBP
|
755,000,000
GBP
|
674,000,000
GBP
|
621,000,000
GBP
|
6,021,000,000
GBP
|
97,000,000
GBP
|
6,642,000,000
GBP
|
103,000,000
GBP
|
443,000,000
GBP
|
1,363,000,000
GBP
|
6,860,000,000
GBP
|
5,837,000,000
GBP
|
7,473,000,000
GBP
|
613,000,000
GBP
|
5,837,000,000
GBP
|
7,473,000,000
GBP
|
6,860,000,000
GBP
|
443,000,000
GBP
|
613,000,000
GBP
|
103,000,000
GBP
|
1,363,000,000
GBP
|
103,000,000
GBP
|
766,000,000
GBP
|
200,000,000
GBP
|
5,962,000,000
GBP
|
588,000,000
GBP
|
5,374,000,000
GBP
|
–
GBP
|
22,000,000
GBP
|
–
GBP
|
–
GBP
|
22,000,000
GBP
|
–
GBP
|
5,837,000,000
GBP
|
22,000,000
GBP
|
200,000,000
GBP
|
588,000,000
GBP
|
5,352,000,000
GBP
|
788,000,000
GBP
|
5,940,000,000
GBP
|
5,837,000,000
GBP
|
103,000,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Non-current provisions [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Non-current provisions | — | — | — | — | — | — |
266,000,000
GBP
|
— | — | — | — | — | — | — | — |
223,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other non-current payables | — | — | — | — | — | — |
27,000,000
GBP
|
— | — | — | — | — | — | — | — |
10,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities | — | — | — | — | — | — |
871,000,000
GBP
|
— | — | — | — | — | — | — | — |
961,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities | — | — | — | — | — | — |
10,950,000,000
GBP
|
— | — | — | — | — | — | — | — |
12,346,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Current provisions [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Current provisions | — | — | — | — | — | — |
148,000,000
GBP
|
— | — | — | — | — | — | — | — |
203,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current payables | — | — | — | — | — | — |
9,579,000,000
GBP
|
— | — | — | — | — | — | — | — |
9,506,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities | — | — | — | — | — | — |
11,899,000,000
GBP
|
— | — | — | — | — | — | — | — |
11,139,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — | — | — | — |
22,849,000,000
GBP
|
— | — | — | — | — | — | — | — |
23,485,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |