Analysis Of Income And Expense [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 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||
| Revenue [abstract] | ||||||||||||||||
| Revenue | — | — | — |
19,750,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
16,997,000,000
GBP
|
— | — |
| Material income and expense [abstract] | ||||||||||||||||
| Gains (losses) on disposals of non-current assets [abstract] | ||||||||||||||||
| Gains (losses) on disposals of non-current assets | — | — | — |
28,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
7,000,000
GBP
|
— | — |
| Finance income (cost) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other finance income (cost) | — | — | — |
40,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
13,000,000
GBP
|
— | — |
| Miscellaneous other comprehensive income [abstract] | ||||||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||||||
| Other comprehensive income, net of tax, hedges of net investments in foreign operations |
1,000,000
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
1,000,000
GBP
|
1,000,000
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
–
GBP
|
| Other comprehensive income, before tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations |
448,000,000
GBP
|
–
GBP
|
22,000,000
GBP
|
470,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
448,000,000
GBP
|
–
GBP
|
429,000,000
GBP
|
429,000,000
GBP
|
–
GBP
|
11,000,000
GBP
|
440,000,000
GBP
|
–
GBP
|
–
GBP
|
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||||||||||||||||
| Share of profit (loss) of associates and joint ventures accounted for using equity method | — | — | — |
124,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
109,000,000
GBP
|
— | — |
| Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax [abstract] | ||||||||||||||||
| Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax |
18,000,000
GBP
|
–
GBP
|
–
GBP
|
18,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
18,000,000
GBP
|
–
GBP
|
28,000,000
GBP
|
28,000,000
GBP
|
–
GBP
|
–
GBP
|
28,000,000
GBP
|
–
GBP
|
–
GBP
|
| Income tax relating to components of other comprehensive income [abstract] | ||||||||||||||||
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — |
1,000,000
GBP
|
— | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||
| Comprehensive income |
397,000,000
GBP
|
1,081,000,000
GBP
|
2,000,000
GBP
|
399,000,000
GBP
|
–
GBP
|
–
GBP
|
220,000,000
GBP
|
464,000,000
GBP
|
391,000,000
GBP
|
456,000,000
GBP
|
2,219,000,000
GBP
|
1,369,000,000
GBP
|
31,000,000
GBP
|
2,250,000,000
GBP
|
3,000,000
GBP
|
–
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — |
397,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
2,219,000,000
GBP
|
— | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — | — |
2,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
31,000,000
GBP
|
— | — |