Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2022-01-29 |
As at 2022-01-29 |
As at 2022-01-29 |
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As at 2022-01-29 |
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As at 2021-01-30 |
As at 2021-01-30 |
As at 2021-01-30 |
As at 2021-01-30 |
As at 2021-01-30 |
As at 2021-01-30 |
As at 2021-01-30 |
As at 2021-01-30 |
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As at 2021-01-30 |
As at 2020-01-25 |
As at 2020-01-25 |
As at 2020-01-25 |
As at 2020-01-25 |
As at 2020-01-25 |
As at 2020-01-25 |
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As at 2020-01-25 |
As at 2020-01-25 |
As at 2020-01-25 |
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| 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 | — | — | — | — | — | — |
3,981,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
3,758,000,000
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 | — | — | — | — | — | — |
2,971,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
3,097,100,000
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 |
13,300,000
GBP
|
16,600,000
GBP
|
900,000
GBP
|
27,900,000
GBP
|
331,700,000
GBP
|
2,731,000,000
GBP
|
1,010,000,000
GBP
|
700,000
GBP
|
1,443,800,000
GBP
|
4,900,000
GBP
|
16,600,000
GBP
|
19,700,000
GBP
|
271,200,000
GBP
|
100,000
GBP
|
1,443,800,000
GBP
|
2,367,200,000
GBP
|
660,900,000
GBP
|
13,300,000
GBP
|
2,500,000
GBP
|
900,000
GBP
|
441,500,000
GBP
|
900,000
GBP
|
2,163,600,000
GBP
|
1,443,800,000
GBP
|
13,300,000
GBP
|
16,600,000
GBP
|
284,900,000
GBP
|
500,000
GBP
|
24,700,000
GBP
|
–
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |