Analysis Of Income And Expense [Abstract]
| Concept |
2021-01-31 to 2022-01-29 |
2021-01-31 to 2022-01-29 |
2021-01-31 to 2022-01-29 |
2021-01-31 to 2022-01-29 |
2021-01-31 to 2022-01-29 |
2021-01-31 to 2022-01-29 |
2021-01-31 to 2022-01-29 |
2021-01-31 to 2022-01-29 |
2021-01-31 to 2022-01-29 |
2021-01-31 to 2022-01-29 |
2020-01-26 to 2021-01-30 |
2020-01-26 to 2021-01-30 |
2020-01-26 to 2021-01-30 |
2020-01-26 to 2021-01-30 |
2020-01-26 to 2021-01-30 |
2020-01-26 to 2021-01-30 |
2020-01-26 to 2021-01-30 |
2020-01-26 to 2021-01-30 |
2020-01-26 to 2021-01-30 |
2020-01-26 to 2021-01-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||||
| Revenue | — | — | — | — | — | — |
4,376,500,000
GBP
|
— | — | — | — | — | — | — |
3,284,100,000
GBP
|
— | — | — | — | — |
| Material income and expense [abstract] | ||||||||||||||||||||
| Impairment loss (reversal of impairment loss) on trade receivables [abstract] | ||||||||||||||||||||
| Impairment loss (reversal of impairment loss) recognised in profit or loss, trade receivables | — | — | — | — | — | — |
28,600,000
GBP
|
— | — | — | — | — | — | — |
54,800,000
GBP
|
— | — | — | — | — |
| Trading income (expense) [abstract] | ||||||||||||||||||||
| Trading income (expense) | — | — | — | — | — | — |
900,600,000
GBP
|
— | — | — | — | — | — | — |
444,000,000
GBP
|
— | — | — | — | — |
| Miscellaneous other comprehensive income [abstract] | ||||||||||||||||||||
| 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 | — | — | — | — | — | — |
2,400,000
GBP
|
— | — | — | — | — | — | — |
2,500,000
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 | — | — | — | — | — | — |
4,800,000
GBP
|
— | — | — | — | — | — | — |
500,000
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 | — | — | — | — | — | — |
7,200,000
GBP
|
— | — | — | — | — | — | — |
2,800,000
GBP
|
— | — | — | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| Comprehensive income |
718,800,000
GBP
|
–
GBP
|
29,900,000
GBP
|
–
GBP
|
2,400,000
GBP
|
600,000
GBP
|
746,900,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
2,500,000
GBP
|
400,000
GBP
|
240,400,000
GBP
|
–
GBP
|
226,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
11,500,000
GBP
|