Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
As at 2022-01-31 |
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As at 2021-01-31 |
As at 2021-01-31 |
As at 2021-01-31 |
As at 2021-01-31 |
As at 2021-01-31 |
As at 2021-01-31 |
As at 2021-01-31 |
As at 2020-01-31 |
As at 2020-01-31 |
As at 2020-01-31 |
As at 2020-01-31 |
As at 2020-01-31 |
As at 2020-01-31 |
As at 2020-01-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of fair value measurement [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of assets [line items] | |||||||||||||||||||||
| Assets | — | — | — | — | — | — |
2,302,400,000
GBP
|
— | — | — | — |
2,212,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, assets [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of liabilities [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [line items] | |||||||||||||||||||||
| Liabilities | — | — | — | — | — | — |
1,649,500,000
GBP
|
— | — | — | — |
1,532,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, liabilities [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of equity [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of equity [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of equity [line items] | |||||||||||||||||||||
| Equity |
21,100,000
GBP
|
700,000
GBP
|
648,300,000
GBP
|
22,400,000
GBP
|
7,400,000
GBP
|
800,000
GBP
|
652,900,000
GBP
|
1,900,000
GBP
|
21,000,000
GBP
|
648,300,000
GBP
|
200,000
GBP
|
680,700,000
GBP
|
5,800,000
GBP
|
7,300,000
GBP
|
4,900,000
GBP
|
7,800,000
GBP
|
65,400,000
GBP
|
20,400,000
GBP
|
11,200,000
GBP
|
519,300,000
GBP
|
588,200,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |