Profit Or Loss [Abstract]
| Concept |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2021-02-01 to 2022-01-31 |
2020-02-01 to 2021-01-31 |
2020-02-01 to 2021-01-31 |
2020-02-01 to 2021-01-31 |
2020-02-01 to 2021-01-31 |
2020-02-01 to 2021-01-31 |
2020-02-01 to 2021-01-31 |
2020-02-01 to 2021-01-31 |
2020-02-01 to 2021-01-31 |
2020-02-01 to 2021-01-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Profit or loss [abstract] | ||||||||||||||||||
| Profit (loss) [abstract] | ||||||||||||||||||
| Revenue | — |
–
GBP
|
13,183,000,000
GBP
|
— | — | — | — |
13,183,000,000
GBP
|
— | — | — |
–
GBP
|
12,343,000,000
GBP
|
— | — | — |
12,343,000,000
GBP
|
— |
| Cost of sales | — |
–
GBP
|
8,248,000,000
GBP
|
— | — | — | — |
8,248,000,000
GBP
|
— | — | — |
–
GBP
|
7,770,000,000
GBP
|
— | — | — |
7,770,000,000
GBP
|
— |
| Gross profit | — |
–
GBP
|
4,935,000,000
GBP
|
— | — | — | — |
4,935,000,000
GBP
|
— | — | — |
–
GBP
|
4,573,000,000
GBP
|
— | — | — |
4,573,000,000
GBP
|
— |
| Other income | — |
3,000,000
GBP
|
23,000,000
GBP
|
— | — | — | — |
26,000,000
GBP
|
— | — | — |
13,000,000
GBP
|
19,000,000
GBP
|
— | — | — |
32,000,000
GBP
|
— |
| Administrative expenses | — |
13,000,000
GBP
|
836,000,000
GBP
|
— | — | — | — |
823,000,000
GBP
|
— | — | — |
6,000,000
GBP
|
809,000,000
GBP
|
— | — | — |
815,000,000
GBP
|
— |
| Other expense, by function | — |
–
GBP
|
–
GBP
|
— | — | — | — |
–
GBP
|
— | — | — |
49,000,000
GBP
|
–
GBP
|
— | — | — |
49,000,000
GBP
|
— |
| Profit (loss) from operating activities | — |
58,000,000
GBP
|
1,086,000,000
GBP
|
— | — | — | — |
1,144,000,000
GBP
|
— | — | — |
30,000,000
GBP
|
946,000,000
GBP
|
— | — | — |
916,000,000
GBP
|
— |
| Finance income | — |
–
GBP
|
11,000,000
GBP
|
— | — | — | — |
11,000,000
GBP
|
— | — | — |
–
GBP
|
20,000,000
GBP
|
— | — | — |
20,000,000
GBP
|
— |
| Finance costs | — |
–
GBP
|
148,000,000
GBP
|
— | — | — | — |
148,000,000
GBP
|
— | — | — |
–
GBP
|
180,000,000
GBP
|
— | — | — |
180,000,000
GBP
|
— |
| Share of profit (loss) of associates and joint ventures accounted for using equity method | — |
–
GBP
|
5,000,000
GBP
|
— | — | — | — |
5,000,000
GBP
|
— | — | — |
–
GBP
|
6,000,000
GBP
|
— | — | — |
6,000,000
GBP
|
— |
| Profit (loss) before tax | — |
58,000,000
GBP
|
949,000,000
GBP
|
— | — | — | — |
1,007,000,000
GBP
|
— | — | — |
30,000,000
GBP
|
786,000,000
GBP
|
— | — | — |
756,000,000
GBP
|
— |
| Tax expense (income) | — |
48,000,000
GBP
|
212,000,000
GBP
|
— | — | — | — |
164,000,000
GBP
|
— | — | — |
18,000,000
GBP
|
182,000,000
GBP
|
— | — | — |
164,000,000
GBP
|
— |
| Profit (loss) |
–
GBP
|
106,000,000
GBP
|
737,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
843,000,000
GBP
|
843,000,000
GBP
|
–
GBP
|
592,000,000
GBP
|
12,000,000
GBP
|
604,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
592,000,000
GBP
|
–
GBP
|
| Earnings per share [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Earnings per share [abstract] | ||||||||||||||||||
| Earnings per share [line items] | ||||||||||||||||||
| Basic earnings per share [abstract] | ||||||||||||||||||
| Basic earnings (loss) per share | — | — | — | — | — | — | — |
0.403
|
— | — | — | — | — | — | — | — |
0.281
|
— |
| Diluted earnings per share [abstract] | ||||||||||||||||||
| Diluted earnings (loss) per share | — | — | — | — | — | — | — |
0.398
|
— | — | — | — | — | — | — | — |
0.279
|
— |